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• 1. [Article] Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04

  Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population ...

  Citation × Citation Citation Abstract Copy Title: Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04 Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population model estimates of sustainable harvest rates (Clark 1991) and, along with mean body size, is an important predictor of the risk of overexploitation (Reynolds et al. 2005). For many U.S. west coast groundfish stocks, data on age and length at maturity is of poor quality. The age at maturity curves used in many stock assessments are currently based on macroscopic (visual) assessment of ovary condition. However, there is abundant evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). The age data that have been used to develop curves of age at maturity for some species is also based on outdated ageing methods, such as surface aging of otoliths, as opposed to the more accurate “break and burn” technique (Barss 1989, Wyllie Echeverria 1987, Chilton and Beamish 1982). For other species, such as cabezon (Scorpaenichthys marmoratus), accurate age and growth data, based on thin-sectioning of otoliths, have just recently been developed (Grebel and Cailliet 2003). Information on age and length at maturity that is based on histological evaluation of maturity status and modern ageing techniques is therefore needed for many U.S. west coast groundfish species. Histology-based maturity data has been developed for some U.S. west coast groundfish species. These include darkblotched rockfish (Sebastes crameri, Nichol and Pikitch 1994), petrale sole (Eopsetta jordani, Hannah et al. 2002), greenstriped rockfish (Sebastes elongatus, Shaw and Gunderson 2006), Pacific ocean perch (Sebastes alutus, Hannah and Parker 2007) and rosethorn rockfish (Sebastes helvomaculatus, Shaw and Gunderson 2008). We report here on the development of similar data for female yelloweye rockfish (Sebastes rubberimus) and cabezon. Title: Length and age at maturity of female yelloweye rockfish (Sebastes rubberimus) and cabezon (Scorpaenichthys marmoratus) from Oregon waters based on histological evaluation of maturity Information Report number 2009-04 Abstract -- Accurate estimates of female age or length at maturity are critical for the conservation of exploited fish stocks. Age at maturity is particularly important, as it strongly influences population model estimates of sustainable harvest rates (Clark 1991) and, along with mean body size, is an important predictor of the risk of overexploitation (Reynolds et al. 2005). For many U.S. west coast groundfish stocks, data on age and length at maturity is of poor quality. The age at maturity curves used in many stock assessments are currently based on macroscopic (visual) assessment of ovary condition. However, there is abundant evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). The age data that have been used to develop curves of age at maturity for some species is also based on outdated ageing methods, such as surface aging of otoliths, as opposed to the more accurate “break and burn” technique (Barss 1989, Wyllie Echeverria 1987, Chilton and Beamish 1982). For other species, such as cabezon (Scorpaenichthys marmoratus), accurate age and growth data, based on thin-sectioning of otoliths, have just recently been developed (Grebel and Cailliet 2003). Information on age and length at maturity that is based on histological evaluation of maturity status and modern ageing techniques is therefore needed for many U.S. west coast groundfish species. Histology-based maturity data has been developed for some U.S. west coast groundfish species. These include darkblotched rockfish (Sebastes crameri, Nichol and Pikitch 1994), petrale sole (Eopsetta jordani, Hannah et al. 2002), greenstriped rockfish (Sebastes elongatus, Shaw and Gunderson 2006), Pacific ocean perch (Sebastes alutus, Hannah and Parker 2007) and rosethorn rockfish (Sebastes helvomaculatus, Shaw and Gunderson 2008). We report here on the development of similar data for female yelloweye rockfish (Sebastes rubberimus) and cabezon. Close

• 2. [Article] Nilestun Year 2 Efficacy Monitoring Report - Juvenile Fish Response

  Abstract -- Catch per unit effort data were gathered for three salt marsh restoration sub-basins, three mainstem river reference locations, and a salt marsh reference sub-basin. Report results cover May-Aug ...

  Citation × Citation Citation Abstract Copy Title: Nilestun Year 2 Efficacy Monitoring Report - Juvenile Fish Response Abstract -- Catch per unit effort data were gathered for three salt marsh restoration sub-basins, three mainstem river reference locations, and a salt marsh reference sub-basin. Report results cover May-Aug occupancy and catch per unit effort during the second year after restoration. Results suggest significant response by age-0 and age-1 salmonids. More broad results provided in the report cover tidal inundation, exchange rates, salinity, temperature, soil moisture and plant communities. Title: Nilestun Year 2 Efficacy Monitoring Report - Juvenile Fish Response Abstract -- Catch per unit effort data were gathered for three salt marsh restoration sub-basins, three mainstem river reference locations, and a salt marsh reference sub-basin. Report results cover May-Aug occupancy and catch per unit effort during the second year after restoration. Results suggest significant response by age-0 and age-1 salmonids. More broad results provided in the report cover tidal inundation, exchange rates, salinity, temperature, soil moisture and plant communities. Close

• 3. [Article] Evaluation of Juvenile Salmonid Outmigration and Survival in the Lower Umatilla River Basin; Annual Report 2009

  Abstract -- In 2009, 3,745 natural and 28,880 hatchery smolts were collected in the juvenile bypass facility at Three Mile Falls Dam (TMFD). A total of 2,876 PIT tagged juvenile salmon and steelhead and ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of Juvenile Salmonid Outmigration and Survival in the Lower Umatilla River Basin; Annual Report 2009 Abstract -- In 2009, 3,745 natural and 28,880 hatchery smolts were collected in the juvenile bypass facility at Three Mile Falls Dam (TMFD). A total of 2,876 PIT tagged juvenile salmon and steelhead and 104 adults were detected. Mean fork length at emigration for natural summer steelhead was 168 mm. Age at emigration was 29.9% age-1 and 70.1% age-2. Condition factor for steelhead smolts was poor (< 1.00) throughout the season and Neascus sp. (black spot), continued to be prevalent. Median emigration time to TMFD and John Day Dam (JDD) for natural summer steelhead occurred in the middle of May (5/14-5/20) compared to late May (5/21-5/27) at Bonneville Dam (BON) and early June (5/28-6/3) at the Columbia River Estuary. Abundance for natural origin summer steelhead was 33,883 ± 4,262 smolts. Survival from Meacham Creek to TMFD, TMFD to JDD, and JDD to BON for the 2009 outmigration year was 47%, 60%, and 38%; respectively. For brood year 2007, we estimated the production of 16 smolts-per-female for summer steelhead. Egg-to-smolt survival for summer steelhead in brood year 2007 was 0.3% and smolt-to-adult return for outmigration year 2007 was 5.4%. The number of spawning females and egg deposition appeared to be associated with the growth, age composition, and production of summer steelhead smolts, thus providing evidence for density dependent effects. Growth appeared to be better during the first rearing season when fish densities were low, leading to a higher composition of age-1 smolts and more smolts produced per spawning female. The downward trend observed in egg-to-smolt survival and correlation between summer low flows and egg-to-smolt survival suggest that smolt production and freshwater productivity of summer steelhead is limited by the quantity and quality of available freshwater habitat. Title: Evaluation of Juvenile Salmonid Outmigration and Survival in the Lower Umatilla River Basin; Annual Report 2009 Abstract -- In 2009, 3,745 natural and 28,880 hatchery smolts were collected in the juvenile bypass facility at Three Mile Falls Dam (TMFD). A total of 2,876 PIT tagged juvenile salmon and steelhead and 104 adults were detected. Mean fork length at emigration for natural summer steelhead was 168 mm. Age at emigration was 29.9% age-1 and 70.1% age-2. Condition factor for steelhead smolts was poor (< 1.00) throughout the season and Neascus sp. (black spot), continued to be prevalent. Median emigration time to TMFD and John Day Dam (JDD) for natural summer steelhead occurred in the middle of May (5/14-5/20) compared to late May (5/21-5/27) at Bonneville Dam (BON) and early June (5/28-6/3) at the Columbia River Estuary. Abundance for natural origin summer steelhead was 33,883 ± 4,262 smolts. Survival from Meacham Creek to TMFD, TMFD to JDD, and JDD to BON for the 2009 outmigration year was 47%, 60%, and 38%; respectively. For brood year 2007, we estimated the production of 16 smolts-per-female for summer steelhead. Egg-to-smolt survival for summer steelhead in brood year 2007 was 0.3% and smolt-to-adult return for outmigration year 2007 was 5.4%. The number of spawning females and egg deposition appeared to be associated with the growth, age composition, and production of summer steelhead smolts, thus providing evidence for density dependent effects. Growth appeared to be better during the first rearing season when fish densities were low, leading to a higher composition of age-1 smolts and more smolts produced per spawning female. The downward trend observed in egg-to-smolt survival and correlation between summer low flows and egg-to-smolt survival suggest that smolt production and freshwater productivity of summer steelhead is limited by the quantity and quality of available freshwater habitat. Close

• 4. [Article] Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Report 2000

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Report 2000 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Report 2000 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 5. [Article] Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2001

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2001 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2001 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 6. [Article] LCMP - Residence Time and Seasonal Movements of Juvenile Coho Salmon in the Ecotone and Lower Estuary of Winchester Creek, South Slough, Oregon

  Abstract -- The juvenile life history of coho salmon Oncorhynchus kisutch in the stream-estuary ecotone of Winchester Creek, South Slough, Oregon, was investigated in 1999–2001. Seines and a rotary screw ...

  Citation × Citation Citation Abstract Copy Title: LCMP - Residence Time and Seasonal Movements of Juvenile Coho Salmon in the Ecotone and Lower Estuary of Winchester Creek, South Slough, Oregon Abstract -- The juvenile life history of coho salmon Oncorhynchus kisutch in the stream-estuary ecotone of Winchester Creek, South Slough, Oregon, was investigated in 1999–2001. Seines and a rotary screw trap were used to capture fish for dye-marking, and residence time within the ecotone was determined for recaptured marked fish. In the lower estuary, ultrasonic transmitters were used to document residence time and patterns of movement for smolts migrating to the ocean. Nearly half of each brood year moved to the estuary as subyearlings. A portion of age-0 juveniles that moved downstream during spring lived in the ecotone through summer for up to 8 months, then most moved back upstream to overwinter. Fish that moved to the ecotone during fall and winter had mean minimum residence times of 48 d in 1999 and 64 d in 2000. Some of the fish that moved to the ecotone during fall and winter moved into an off-channel beaver pond and resided there for a mean of 49 d. Spring age-1 smolts had a mean minimum residence time in the ecotone of 18 d for both years and used recently restored salt marshes and other off-channel habitats. Smolts implanted with ultrasonic transmitters lived in the lower estuary for an average of 5.8 d, during which their direction of movement corresponded to the direction of tidal flow. Title: LCMP - Residence Time and Seasonal Movements of Juvenile Coho Salmon in the Ecotone and Lower Estuary of Winchester Creek, South Slough, Oregon Abstract -- The juvenile life history of coho salmon Oncorhynchus kisutch in the stream-estuary ecotone of Winchester Creek, South Slough, Oregon, was investigated in 1999–2001. Seines and a rotary screw trap were used to capture fish for dye-marking, and residence time within the ecotone was determined for recaptured marked fish. In the lower estuary, ultrasonic transmitters were used to document residence time and patterns of movement for smolts migrating to the ocean. Nearly half of each brood year moved to the estuary as subyearlings. A portion of age-0 juveniles that moved downstream during spring lived in the ecotone through summer for up to 8 months, then most moved back upstream to overwinter. Fish that moved to the ecotone during fall and winter had mean minimum residence times of 48 d in 1999 and 64 d in 2000. Some of the fish that moved to the ecotone during fall and winter moved into an off-channel beaver pond and resided there for a mean of 49 d. Spring age-1 smolts had a mean minimum residence time in the ecotone of 18 d for both years and used recently restored salt marshes and other off-channel habitats. Smolts implanted with ultrasonic transmitters lived in the lower estuary for an average of 5.8 d, during which their direction of movement corresponded to the direction of tidal flow. Close

• 7. [Article] LCMP - Juvenile Salmonid Outmigration in the Little North Fork Wilson and Little South Fork Kilchis Rivers - 2001

  Abstract -- Since 1998, as part of the Oregon Plan for Salmon and Watersheds, the Oregon Department of Fish and Wildlife (ODFW) has monitored downstream migration of juvenile salmonids (Oncorhynchus spp.) ...

  Citation × Citation Citation Abstract Copy Title: LCMP - Juvenile Salmonid Outmigration in the Little North Fork Wilson and Little South Fork Kilchis Rivers - 2001 Abstract -- Since 1998, as part of the Oregon Plan for Salmon and Watersheds, the Oregon Department of Fish and Wildlife (ODFW) has monitored downstream migration of juvenile salmonids (Oncorhynchus spp.) in various streams along the coast. The goals of this program were discussed by Dalton (1998). Briefly, we examine migration timing and abundance of the various species by size and/or age class. In the Tillamook Bay watershed, the Tillamook County Performance Partnership (TCCP) and the Oregon Department of Forestry (ODFW) have provided funding for monitoring in the Little North Fork (LNF) Wilson and Little South Fork (LSF) Kilchis rivers. Data collected during the 2001 trapping season and an annual report are presented for juvenile salmonid out-migrant trapping on the LNF Wilson and LSF Kilchis rivers. Juvenile chinook salmon numbers had decreased greatly each year from 1998 to 2000 in both rivers, but in 2001 this trend was reversed. Data is presented as tables and figures within the report. Title: LCMP - Juvenile Salmonid Outmigration in the Little North Fork Wilson and Little South Fork Kilchis Rivers - 2001 Abstract -- Since 1998, as part of the Oregon Plan for Salmon and Watersheds, the Oregon Department of Fish and Wildlife (ODFW) has monitored downstream migration of juvenile salmonids (Oncorhynchus spp.) in various streams along the coast. The goals of this program were discussed by Dalton (1998). Briefly, we examine migration timing and abundance of the various species by size and/or age class. In the Tillamook Bay watershed, the Tillamook County Performance Partnership (TCCP) and the Oregon Department of Forestry (ODFW) have provided funding for monitoring in the Little North Fork (LNF) Wilson and Little South Fork (LSF) Kilchis rivers. Data collected during the 2001 trapping season and an annual report are presented for juvenile salmonid out-migrant trapping on the LNF Wilson and LSF Kilchis rivers. Juvenile chinook salmon numbers had decreased greatly each year from 1998 to 2000 in both rivers, but in 2001 this trend was reversed. Data is presented as tables and figures within the report. Close

• 8. [Article] Information Report Number 2006-02; Analysis of Factors Potentially Inflating the Marine Survival Estimate of Coho Salmon (Oncorhynchus kisutch) at Mill Creek, Yaquina River, Central Oregon Coast

  Abstract -- Scale and otolith analyses were used to determine if high marine survival estimates observed for coho salmon at an Oregon Department of Fish and Wildlife Life Cycle Monitoring Project site ...

  Citation × Citation Citation Abstract Copy Title: Information Report Number 2006-02; Analysis of Factors Potentially Inflating the Marine Survival Estimate of Coho Salmon (Oncorhynchus kisutch) at Mill Creek, Yaquina River, Central Oregon Coast Abstract -- Scale and otolith analyses were used to determine if high marine survival estimates observed for coho salmon at an Oregon Department of Fish and Wildlife Life Cycle Monitoring Project site are inflated by 1) adult coho that reared as juveniles in other tributaries straying to the site, or 2) coho dispersing out of the site as fry, rearing in nearby salt marsh habitat, then returning to the site to contribute to the adult population. Scale analysis indicated that adult straying from other tributaries in the basin was unlikely to be contributing to the high marine survival estimate at the site. Scale analysis also indicated no evidence that coho fry rearing in nearby salt marshes were smolting as age-0+ fish and returning to contribute to the adult spawner population. Analyses of otolith strontium profiles were unable to distinguish differences in habitat use for fish reared in freshwater and marsh habitat because of aberrantly high ambient strontium to calcium abundance in the freshwater environment. Therefore the method was unsuitable for determining if coho fry rearing in nearby salt marshes were smolting as age-1+ fish and returning to contribute to the adult spawner population. Title: Information Report Number 2006-02; Analysis of Factors Potentially Inflating the Marine Survival Estimate of Coho Salmon (Oncorhynchus kisutch) at Mill Creek, Yaquina River, Central Oregon Coast Abstract -- Scale and otolith analyses were used to determine if high marine survival estimates observed for coho salmon at an Oregon Department of Fish and Wildlife Life Cycle Monitoring Project site are inflated by 1) adult coho that reared as juveniles in other tributaries straying to the site, or 2) coho dispersing out of the site as fry, rearing in nearby salt marsh habitat, then returning to the site to contribute to the adult population. Scale analysis indicated that adult straying from other tributaries in the basin was unlikely to be contributing to the high marine survival estimate at the site. Scale analysis also indicated no evidence that coho fry rearing in nearby salt marshes were smolting as age-0+ fish and returning to contribute to the adult spawner population. Analyses of otolith strontium profiles were unable to distinguish differences in habitat use for fish reared in freshwater and marsh habitat because of aberrantly high ambient strontium to calcium abundance in the freshwater environment. Therefore the method was unsuitable for determining if coho fry rearing in nearby salt marshes were smolting as age-1+ fish and returning to contribute to the adult spawner population. Close

• 9. [Article] Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 1998

  Abstract -- This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program (NPPC 1994). Measure 4.3C specifies that the key indicator populations should ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 1998 Abstract -- This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program (NPPC 1994). Measure 4.3C specifies that the key indicator populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to recommendations and needs of the PATH project, the Fish and Wildlife Program, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; John Day Basin Spring Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 1998 Abstract -- This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program (NPPC 1994). Measure 4.3C specifies that the key indicator populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to recommendations and needs of the PATH project, the Fish and Wildlife Program, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 10. [Article] Maturity of female quillback (Sebastes maliger) and china rockfish (S. nebulosus) from Oregon waters based on histological evaluation of ovaries Information Reports number 2011-01

  Abstract -- Since 2000, ODFW’s Marine Resources Program has been collecting female maturity data on a variety of groundfish species in an effort to improve the maturity data available for use in stock ...

  Citation × Citation Citation Abstract Copy Title: Maturity of female quillback (Sebastes maliger) and china rockfish (S. nebulosus) from Oregon waters based on histological evaluation of ovaries Information Reports number 2011-01 Abstract -- Since 2000, ODFW’s Marine Resources Program has been collecting female maturity data on a variety of groundfish species in an effort to improve the maturity data available for use in stock assessments (e.g. Hannah et al. 2002, Hannah and Parker 2007). For many U.S. west coast groundfish stocks, data on female age and length at maturity is of questionable quality. The maturity curves currently used in some stock assessments are based on macroscopic (visual) assessment of ovary condition. However, there is strong evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). We report here on the development of histologically-based length and age at maturity data for female quillback rockfish (Sebastes maliger) and length at maturity data for female china rockfish (S. nebulosus). Title: Maturity of female quillback (Sebastes maliger) and china rockfish (S. nebulosus) from Oregon waters based on histological evaluation of ovaries Information Reports number 2011-01 Abstract -- Since 2000, ODFW’s Marine Resources Program has been collecting female maturity data on a variety of groundfish species in an effort to improve the maturity data available for use in stock assessments (e.g. Hannah et al. 2002, Hannah and Parker 2007). For many U.S. west coast groundfish stocks, data on female age and length at maturity is of questionable quality. The maturity curves currently used in some stock assessments are based on macroscopic (visual) assessment of ovary condition. However, there is strong evidence that histological evaluation of ovarian thin-sections, especially if combined with optimal seasonal sampling, is much more accurate (Gunderson et al. 1980, Wyllie Echeverria 1987, West 1990, Nichol and Pikitch 1994, Hannah and Parker 2007). We report here on the development of histologically-based length and age at maturity data for female quillback rockfish (Sebastes maliger) and length at maturity data for female china rockfish (S. nebulosus). Close

• 11. [Article] 2006 Borax Lake Chub Investigations Progress Reports 2006

  Abstract -- Borax Lake chub (Gila boraxobius) is represented by a single population that inhabits a 4.1 hectare geothermally-heated alkaline lake in Harney County, Oregon. The Borax Lake chub is a small ...

  Citation × Citation Citation Abstract Copy Title: 2006 Borax Lake Chub Investigations Progress Reports 2006 Abstract -- Borax Lake chub (Gila boraxobius) is represented by a single population that inhabits a 4.1 hectare geothermally-heated alkaline lake in Harney County, Oregon. The Borax Lake chub is a small minnow endemic to Borax Lake and adjacent wetlands in Oregon’s Alvord Basin (Williams and Bond 1980). Borax Lake is a natural lake, perched 10 meters above the desert floor on sinter deposits, which is fed almost exclusively by thermal groundwater. The Borax Lake chub was listed as endangered under the federal Endangered Species Act in 1982 (U.S. Fish and Wildlife Service 1982). Population abundance estimates obtained in 1991-1996 indicated a fluctuating population ranging from a low of 8,144 fish to a high of 34,634 fish (Salzer 1997). The basis for the Borax Lake chub’s listed status was not population size, but the security of a very limited, unique, isolated, and vulnerable habitat. Because Borax Lake is situated above salt deposits on the desert floor, alteration of the salt crust shoreline could reduce lake levels and the habitat quantity and quality available to Borax Lake chub. At the time of the listing, Borax Lake was threatened by habitat alteration caused by geothermal energy development and alteration of the lake shore crust to provide irrigation to surrounding pasture lands. The Borax Lake chub federal recovery plan, completed in 1987, advocated protection of the lake ecosystem through the acquisition of key private lands, protection of groundwater and surface waters, controls on access, and the removal of livestock grazing (U.S. Fish and Wildlife Service 1987). Numerous recovery measures implemented since listing have improved the conservation status of Borax Lake chub and protection of its habitat (Williams and Macdonald 2003). When the species was listed, critical habitat was designated on 259 hectares of land surrounding the lake, including 129 hectares of public lands and two 65- hectare parcels of private land. In 1983, the U.S. Bureau of Land Management designated the public land as an Area of Critical Environmental Concern. The Nature Conservancy began leasing the private lands in 1983 and purchased them in 1993, bringing the entire critical habitat into public or conservation ownership. The Nature Conservancy ended water diversion from the lake for irrigation and livestock grazing within the critical habitat. Passage of the Steens Mountain Cooperative Management and Protection Act of 2000 removed the public BLM lands from mineral and geothermal development within a majority of the basin. These actions, combined with detailed studies of the chub and their habitat have added substantially to our knowledge of the Borax Lake ecosystem (Scoppettone et al. 1995, Salzer 1992, Perkins et al. 1996). However, three primary threats remain. These include the threat to the fragile lake shoreline, wetlands, and soils from a recent increase in recreational use around the lake (particularly off-road vehicle usage), the threat of introduction of nonnative species, and potential negative impacts to the aquifer from geothermal groundwater withdrawal if groundwater pumping were to occur on private lands outside the protected areas (Williams and Macdonald 2003). Although an increase in abundance is not a goal in the successful recovery of this species, monitoring trends in abundance over time is an important management tool to assess species status. From 1998-2004, data describing the abundance of the Borax Lake chub population are not available. Abundance estimates were obtained from 1986- 1997 by The Nature Conservancy (Salzer 1997) (Figure 1). Abundance estimates for 1986-1990 are not comparable with those obtained in 1991-1997. Prior to 1991, estimates were obtained only from traps set around the perimeter of the lake. In 1991, estimates were obtained from traps set on a regularly spaced grid throughout the lake. A study comparing the methods suggests that prior to 1991 abundance was under estimated, perhaps by as much as 50 percent (Salzer 1992). A recent review of the conservation status of the Borax Lake chub by Williams and Macdonald (2003) cited the lack of recent and ongoing population and ecosystem monitoring as one argument against downlisting or delisting the species at this time. The chub population has experienced substantial fluctuations in abundance over the time period (1986-1997) when abundance data are available (Figure 1). At the time of the review, the most recent abundance estimates that were obtained in 1996 and 1997 were some of the lowest estimates since 1991. Borax Lake chub population abundance estimates from 1986 to 1997 and 2005 to 2006. Horizontal bars represent 95% confidence limits. In 1986-1990 (solid symbols), only the perimeter of the lake was trapped. After 1990 (open symbols) the entire lake was trapped. Estimates are not directly comparable across these time periods. There are limited data on population age structure that offer valuable insight into the productivity of Borax Lake chub. Williams and Bond (1983) examined lengthfrequency data and concluded that the population consisted primarily of age 1 fish, with few age 2 and age 3 fish present. Limited opercle bone aging of chub collected in 1992- 1993 also indicated that most Borax Lake were less than one year of age (67-79%), yet a few individuals were aged at 10+ years (Scoppettone 1995). Because Borax Lake chub are only found in one location and the population is apparently dominated by a single year-class of adults, the species has a high inherent risk of extinction. 3 The objectives of this study were to: 1) obtain a mark-recapture population estimate of Borax Lake chub, and 2) to evaluate ways to reduce handling of Borax Lake chub when monitoring population abundance both by modifying previous mark-recapture protocols and by developing snorkeling survey protocols to use as an alternative to mark-recapture estimates. In addition, we collected data regarding lake temperatures, chub size (age) structure, and the condition of the fragile lake shoreline and outflows. Title: 2006 Borax Lake Chub Investigations Progress Reports 2006 Abstract -- Borax Lake chub (Gila boraxobius) is represented by a single population that inhabits a 4.1 hectare geothermally-heated alkaline lake in Harney County, Oregon. The Borax Lake chub is a small minnow endemic to Borax Lake and adjacent wetlands in Oregon’s Alvord Basin (Williams and Bond 1980). Borax Lake is a natural lake, perched 10 meters above the desert floor on sinter deposits, which is fed almost exclusively by thermal groundwater. The Borax Lake chub was listed as endangered under the federal Endangered Species Act in 1982 (U.S. Fish and Wildlife Service 1982). Population abundance estimates obtained in 1991-1996 indicated a fluctuating population ranging from a low of 8,144 fish to a high of 34,634 fish (Salzer 1997). The basis for the Borax Lake chub’s listed status was not population size, but the security of a very limited, unique, isolated, and vulnerable habitat. Because Borax Lake is situated above salt deposits on the desert floor, alteration of the salt crust shoreline could reduce lake levels and the habitat quantity and quality available to Borax Lake chub. At the time of the listing, Borax Lake was threatened by habitat alteration caused by geothermal energy development and alteration of the lake shore crust to provide irrigation to surrounding pasture lands. The Borax Lake chub federal recovery plan, completed in 1987, advocated protection of the lake ecosystem through the acquisition of key private lands, protection of groundwater and surface waters, controls on access, and the removal of livestock grazing (U.S. Fish and Wildlife Service 1987). Numerous recovery measures implemented since listing have improved the conservation status of Borax Lake chub and protection of its habitat (Williams and Macdonald 2003). When the species was listed, critical habitat was designated on 259 hectares of land surrounding the lake, including 129 hectares of public lands and two 65- hectare parcels of private land. In 1983, the U.S. Bureau of Land Management designated the public land as an Area of Critical Environmental Concern. The Nature Conservancy began leasing the private lands in 1983 and purchased them in 1993, bringing the entire critical habitat into public or conservation ownership. The Nature Conservancy ended water diversion from the lake for irrigation and livestock grazing within the critical habitat. Passage of the Steens Mountain Cooperative Management and Protection Act of 2000 removed the public BLM lands from mineral and geothermal development within a majority of the basin. These actions, combined with detailed studies of the chub and their habitat have added substantially to our knowledge of the Borax Lake ecosystem (Scoppettone et al. 1995, Salzer 1992, Perkins et al. 1996). However, three primary threats remain. These include the threat to the fragile lake shoreline, wetlands, and soils from a recent increase in recreational use around the lake (particularly off-road vehicle usage), the threat of introduction of nonnative species, and potential negative impacts to the aquifer from geothermal groundwater withdrawal if groundwater pumping were to occur on private lands outside the protected areas (Williams and Macdonald 2003). Although an increase in abundance is not a goal in the successful recovery of this species, monitoring trends in abundance over time is an important management tool to assess species status. From 1998-2004, data describing the abundance of the Borax Lake chub population are not available. Abundance estimates were obtained from 1986- 1997 by The Nature Conservancy (Salzer 1997) (Figure 1). Abundance estimates for 1986-1990 are not comparable with those obtained in 1991-1997. Prior to 1991, estimates were obtained only from traps set around the perimeter of the lake. In 1991, estimates were obtained from traps set on a regularly spaced grid throughout the lake. A study comparing the methods suggests that prior to 1991 abundance was under estimated, perhaps by as much as 50 percent (Salzer 1992). A recent review of the conservation status of the Borax Lake chub by Williams and Macdonald (2003) cited the lack of recent and ongoing population and ecosystem monitoring as one argument against downlisting or delisting the species at this time. The chub population has experienced substantial fluctuations in abundance over the time period (1986-1997) when abundance data are available (Figure 1). At the time of the review, the most recent abundance estimates that were obtained in 1996 and 1997 were some of the lowest estimates since 1991. Borax Lake chub population abundance estimates from 1986 to 1997 and 2005 to 2006. Horizontal bars represent 95% confidence limits. In 1986-1990 (solid symbols), only the perimeter of the lake was trapped. After 1990 (open symbols) the entire lake was trapped. Estimates are not directly comparable across these time periods. There are limited data on population age structure that offer valuable insight into the productivity of Borax Lake chub. Williams and Bond (1983) examined lengthfrequency data and concluded that the population consisted primarily of age 1 fish, with few age 2 and age 3 fish present. Limited opercle bone aging of chub collected in 1992- 1993 also indicated that most Borax Lake were less than one year of age (67-79%), yet a few individuals were aged at 10+ years (Scoppettone 1995). Because Borax Lake chub are only found in one location and the population is apparently dominated by a single year-class of adults, the species has a high inherent risk of extinction. 3 The objectives of this study were to: 1) obtain a mark-recapture population estimate of Borax Lake chub, and 2) to evaluate ways to reduce handling of Borax Lake chub when monitoring population abundance both by modifying previous mark-recapture protocols and by developing snorkeling survey protocols to use as an alternative to mark-recapture estimates. In addition, we collected data regarding lake temperatures, chub size (age) structure, and the condition of the fragile lake shoreline and outflows. Close

• 12. [Article] Standard operating procedures for collection and preparation of fish scales and data management

  Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling ...

  Citation × Citation Citation Abstract Copy Title: Standard operating procedures for collection and preparation of fish scales and data management Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling through age estimations and other life history analyses and data dissemination. Title: Standard operating procedures for collection and preparation of fish scales and data management Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling through age estimations and other life history analyses and data dissemination. Close

• 13. [Article] Development of a system-wide Predator Control Program: Indexing and Fisheries Evaluation - Columbia and Snake Rivers

  Abstract -- The Northern Pikeminnow Management Program (NPMP), a fishery aimed at reducing predation on juvenile salmonids by northern pikeminnow (Ptychocheilus oregonensis), was implemented for the 16th ...

  Citation × Citation Citation Abstract Copy Title: Development of a system-wide Predator Control Program: Indexing and Fisheries Evaluation - Columbia and Snake Rivers Abstract -- The Northern Pikeminnow Management Program (NPMP), a fishery aimed at reducing predation on juvenile salmonids by northern pikeminnow (Ptychocheilus oregonensis), was implemented for the 16th consecutive year in the mainstem Columbia and Snake rivers. We report on (1) northern pikeminnow exploitation rates, predation estimates, spaghetti tag loss rates, and age validation work; (2) population parameters of northern pikeminnow, smallmouth bass (Micropterus dolomieu), and walleye (Sander vitreus) in The Dalles and John Day reservoirs, and (3) possible compensatory responses by these species. Title: Development of a system-wide Predator Control Program: Indexing and Fisheries Evaluation - Columbia and Snake Rivers Abstract -- The Northern Pikeminnow Management Program (NPMP), a fishery aimed at reducing predation on juvenile salmonids by northern pikeminnow (Ptychocheilus oregonensis), was implemented for the 16th consecutive year in the mainstem Columbia and Snake rivers. We report on (1) northern pikeminnow exploitation rates, predation estimates, spaghetti tag loss rates, and age validation work; (2) population parameters of northern pikeminnow, smallmouth bass (Micropterus dolomieu), and walleye (Sander vitreus) in The Dalles and John Day reservoirs, and (3) possible compensatory responses by these species. Close

• 14. [Article] Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016

  Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. ...

  Citation × Citation Citation Abstract Copy Title: Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016 Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. Data include rotary screw trap catch and associated trap efficiency estimates, length and weight data for spring Chinook salmon and summer steelhead, age data for summer steelhead, and water temperature and discharge data for select streams in the Grande Ronde River Subbasin. Title: Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016 Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. Data include rotary screw trap catch and associated trap efficiency estimates, length and weight data for spring Chinook salmon and summer steelhead, age data for summer steelhead, and water temperature and discharge data for select streams in the Grande Ronde River Subbasin. Close

• 15. [Article] Little Sheep Creek, Imnaha River Subbasin, Rotary Screw Trap Data - Migratory Year 2016

  Abstract -- Field data from Little Sheep Creek, Imnaha River Subbasin (northeast Oregon)for a project designed to collect tissue samples from and enumerate summer steelhead outmigrants for an ongoing study ...

  Citation × Citation Citation Abstract Copy Title: Little Sheep Creek, Imnaha River Subbasin, Rotary Screw Trap Data - Migratory Year 2016 Abstract -- Field data from Little Sheep Creek, Imnaha River Subbasin (northeast Oregon)for a project designed to collect tissue samples from and enumerate summer steelhead outmigrants for an ongoing study of the relative reproductive success (RRS) of natural and hatchery origin summer steelhead adults released to spawn in the wild. Title: Little Sheep Creek, Imnaha River Subbasin, Rotary Screw Trap Data - Migratory Year 2016 Abstract -- Field data from Little Sheep Creek, Imnaha River Subbasin (northeast Oregon)for a project designed to collect tissue samples from and enumerate summer steelhead outmigrants for an ongoing study of the relative reproductive success (RRS) of natural and hatchery origin summer steelhead adults released to spawn in the wild. Close

• 16. [Article] 2016 Oregon pink shrimp biological sampling data

  Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each ...

  Citation × Citation Citation Abstract Copy Title: 2016 Oregon pink shrimp biological sampling data Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each VPE, 1) abundance (pounds of shrimp caught in each area) and 2) catch composition (size and age of shrimp by each month and area). This data describes the catch composition by year of shrimp biological sampling. These data are raw, to allow flexible analysis. Previous data published by Zirges, then Hannah/Jones shows summaries from time periods. These data are regarding the pink shrimp delivered into Oregon ports in 2016. Title: 2016 Oregon pink shrimp biological sampling data Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each VPE, 1) abundance (pounds of shrimp caught in each area) and 2) catch composition (size and age of shrimp by each month and area). This data describes the catch composition by year of shrimp biological sampling. These data are raw, to allow flexible analysis. Previous data published by Zirges, then Hannah/Jones shows summaries from time periods. These data are regarding the pink shrimp delivered into Oregon ports in 2016. Close

• 17. [Article] A Survey of Shrimp Abundance, Sex Composition, Bycatch and Trawl Gear Performance on the Northern Oregon Shrimp Grounds - Fall 2004, Information Reports 2005-01

  Abstract -- This reports summarizes the sampling activities and results from a fall 2004 research cruise to investigate selected aspects of the ecology of the ocean shrimp (Pandalus jordani) grounds as ...

  Citation × Citation Citation Abstract Copy Title: A Survey of Shrimp Abundance, Sex Composition, Bycatch and Trawl Gear Performance on the Northern Oregon Shrimp Grounds - Fall 2004, Information Reports 2005-01 Abstract -- This reports summarizes the sampling activities and results from a fall 2004 research cruise to investigate selected aspects of the ecology of the ocean shrimp (Pandalus jordani) grounds as they relate to the commercial shrimp trawl fishery. The cruise investigated questions related to the fine-scale distribution of shrimp by age, sex and depth as well as the species composition of juvenile rockfish bycatch in the fishery. Title: A Survey of Shrimp Abundance, Sex Composition, Bycatch and Trawl Gear Performance on the Northern Oregon Shrimp Grounds - Fall 2004, Information Reports 2005-01 Abstract -- This reports summarizes the sampling activities and results from a fall 2004 research cruise to investigate selected aspects of the ecology of the ocean shrimp (Pandalus jordani) grounds as they relate to the commercial shrimp trawl fishery. The cruise investigated questions related to the fine-scale distribution of shrimp by age, sex and depth as well as the species composition of juvenile rockfish bycatch in the fishery. Close

• 18. [Article] 2017 Oregon pink shrimp biological sampling data

  Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each ...

  Citation × Citation Citation Abstract Copy Title: 2017 Oregon pink shrimp biological sampling data Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each VPE, 1) abundance (pounds of shrimp caught in each area) and 2) catch composition (size and age of shrimp by each month and area). This data describes the catch composition by year of shrimp biological sampling. These data are raw, to allow flexible analysis. Previous data published by Zirges, then Hannah/Jones shows summaries from time periods. These data are regarding the pink shrimp delivered into Oregon ports in 2017. Title: 2017 Oregon pink shrimp biological sampling data Abstract -- The Oregon pink shrimp fishery depends on Virtual Population Analysis (VPA) to form a Virtual Population Estimate (VPE) for appropriate management. Two key metrics are incorporated into each VPE, 1) abundance (pounds of shrimp caught in each area) and 2) catch composition (size and age of shrimp by each month and area). This data describes the catch composition by year of shrimp biological sampling. These data are raw, to allow flexible analysis. Previous data published by Zirges, then Hannah/Jones shows summaries from time periods. These data are regarding the pink shrimp delivered into Oregon ports in 2017. Close

• 19. [Article] Abundance and life history characteristics of steelhead (Oncorhynchus mykiss) and Coho Salmon (Oncorhynchus kisutch) smolts in two direct ocean tributaries on the central Oregon coast, Information Report 2018-07

  Abstract -- In 1991, the Oregon Department of Fish and Wildlife (ODFW) began an intensive research study at Tenmile Creek on the central Oregon coast to evaluate the effects of a large wood addition on ...

  Citation × Citation Citation Abstract Copy Title: Abundance and life history characteristics of steelhead (Oncorhynchus mykiss) and Coho Salmon (Oncorhynchus kisutch) smolts in two direct ocean tributaries on the central Oregon coast, Information Report 2018-07 Abstract -- In 1991, the Oregon Department of Fish and Wildlife (ODFW) began an intensive research study at Tenmile Creek on the central Oregon coast to evaluate the effects of a large wood addition on juvenile salmonid populations. Nearby Cummins Creek served as a reference site. Annual monitoring of juvenile salmonid out-migrants began in 1992 at the two sites, continued through 2012 at Cummins Creek, and is ongoing at Tenmile Creek. These data offer an unusually long time-series of smolt abundance and life history characteristics for steelhead and Coho Salmon at monitoring sites located less than a kilometer from the point of ocean entry. Annual estimates of steelhead smolt abundance ranged from 740 to 3,236 smolts at Cummins Creek, and from 2,464 to 19,602 smolts at Tenmile Creek. For Coho Salmon, annual estimates ranged from 319 to 3,164 smolts at Cummins Creek, and from 1,637 to 11,553 smolts at Tenmile Creek. Steelhead smolt production at Tenmile Creek appeared to increase significantly relative to Cummins Creek following the large wood addition in 1996, but there was no evidence of a similar effect on Coho Salmon smolt production. Most steelhead smolts spent 2 years rearing in freshwater before out-migration, and we observed a higher proportion of age-1 smolts and lower proportion of age-3 smolts than several other studies in Oregon coastal streams. Coho Salmon smolt out-migrants were dominated by age-1 individuals at both sites, but there was evidence that some juvenile Coho Salmon out-migrated as age-0 smolts. Smolts of both species tended to be larger at Tenmile Creek than at Cummins Creek, and negative relationships between mean smolt size and smolt abundance suggest that rearing density may influence growth for juvenile salmonids in these streams. The median migration date of steelhead smolts was consistent over time and tracked closely between the two sites. Coho Salmon smolt out-migration timing was more variable and tended to be slightly later than for steelhead, particularly at Tenmile Creek. During peak migration, a high proportion of steelhead migrants classified as smolts based on length had body coloration consistent with smoltification. External signs of smoltification were not as prevalent among steelhead captured early in the season, particularly among smaller migrants. This long term out-migrant monitoring at the ocean entrance illustrates the variation that occurs in freshwater production and the patterns that occur in salmonid smolt life history but also shows that without spawner abundance data conclusions about freshwater production are limited. Title: Abundance and life history characteristics of steelhead (Oncorhynchus mykiss) and Coho Salmon (Oncorhynchus kisutch) smolts in two direct ocean tributaries on the central Oregon coast, Information Report 2018-07 Abstract -- In 1991, the Oregon Department of Fish and Wildlife (ODFW) began an intensive research study at Tenmile Creek on the central Oregon coast to evaluate the effects of a large wood addition on juvenile salmonid populations. Nearby Cummins Creek served as a reference site. Annual monitoring of juvenile salmonid out-migrants began in 1992 at the two sites, continued through 2012 at Cummins Creek, and is ongoing at Tenmile Creek. These data offer an unusually long time-series of smolt abundance and life history characteristics for steelhead and Coho Salmon at monitoring sites located less than a kilometer from the point of ocean entry. Annual estimates of steelhead smolt abundance ranged from 740 to 3,236 smolts at Cummins Creek, and from 2,464 to 19,602 smolts at Tenmile Creek. For Coho Salmon, annual estimates ranged from 319 to 3,164 smolts at Cummins Creek, and from 1,637 to 11,553 smolts at Tenmile Creek. Steelhead smolt production at Tenmile Creek appeared to increase significantly relative to Cummins Creek following the large wood addition in 1996, but there was no evidence of a similar effect on Coho Salmon smolt production. Most steelhead smolts spent 2 years rearing in freshwater before out-migration, and we observed a higher proportion of age-1 smolts and lower proportion of age-3 smolts than several other studies in Oregon coastal streams. Coho Salmon smolt out-migrants were dominated by age-1 individuals at both sites, but there was evidence that some juvenile Coho Salmon out-migrated as age-0 smolts. Smolts of both species tended to be larger at Tenmile Creek than at Cummins Creek, and negative relationships between mean smolt size and smolt abundance suggest that rearing density may influence growth for juvenile salmonids in these streams. The median migration date of steelhead smolts was consistent over time and tracked closely between the two sites. Coho Salmon smolt out-migration timing was more variable and tended to be slightly later than for steelhead, particularly at Tenmile Creek. During peak migration, a high proportion of steelhead migrants classified as smolts based on length had body coloration consistent with smoltification. External signs of smoltification were not as prevalent among steelhead captured early in the season, particularly among smaller migrants. This long term out-migrant monitoring at the ocean entrance illustrates the variation that occurs in freshwater production and the patterns that occur in salmonid smolt life history but also shows that without spawner abundance data conclusions about freshwater production are limited. Close

• 20. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2014 Annual Progress Report

  Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2014. Also summarized ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2014 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2014. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. This report provides information on rearing and release operations for brood year (BY) 2012 of juvenile Chinook Salmon smolts, the collection of eggs for BY 2014, numbers and characteristics (e.g., age composition) of mature Chinook Salmon in the 2014 return year, the 2014 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD) monitoring, and survival information (e.g., SAR, R:S) for BY 2009. These metrics document the success of these programs in meeting the LSRCP objectives for mature salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. In order to avoid confusion around whether jacks (age 3) are included with adult metrics, we will use the convention that “adults” include only ages 4 and 5 and “total” or “mature salmon” include all sexually mature salmon ages 3–5. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2014 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2014. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. This report provides information on rearing and release operations for brood year (BY) 2012 of juvenile Chinook Salmon smolts, the collection of eggs for BY 2014, numbers and characteristics (e.g., age composition) of mature Chinook Salmon in the 2014 return year, the 2014 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD) monitoring, and survival information (e.g., SAR, R:S) for BY 2009. These metrics document the success of these programs in meeting the LSRCP objectives for mature salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. In order to avoid confusion around whether jacks (age 3) are included with adult metrics, we will use the convention that “adults” include only ages 4 and 5 and “total” or “mature salmon” include all sexually mature salmon ages 3–5. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 21. [Article] The Distribution and Abundance of Great Basin Redband Trout: An Application of Variable Probability Sampling in a 1999 Status Review

  Abstract -- Using a variable probability sampling design, streams throughout the entire range of Great Basin redband trout (Oncorhynchus mykiss ssp.) were randomly sampled use the EMAP sampling protocol, ...

  Citation × Citation Citation Abstract Copy Title: The Distribution and Abundance of Great Basin Redband Trout: An Application of Variable Probability Sampling in a 1999 Status Review Abstract -- Using a variable probability sampling design, streams throughout the entire range of Great Basin redband trout (Oncorhynchus mykiss ssp.) were randomly sampled use the EMAP sampling protocol, such that 35 sample sites were apportioned to each of six subbasins (Silver Lake, Lake Abert, Goose Lake, Warner Valley, Catlow Valley, and Malheur Lakes). A total of 185 sites (out of a target of 210) were visited by three-person crews that conducted habitat surveys and population estimates in sample reaches whose length were nearly 20 times their channel width. A minimal sampling intensity was based on previously encountered levels of between site variance in abundance estimates for the species. The population estimate for age 1+ redband trout was 948,852 fish (+/– 21%), with confidence limits ranging from 26% to 43% of individual subbasin estimates. Age 1+ fish abundance in terms of density (fish m-2) showed no significant differences between any subbasin, while there were significant differences in biomass (g m-2), where one subbasin had significantly higher (Catlow Valley) biomasses, and one significantly lower (Goose Lake). These comparisons were supported by like differences in mean weight (g fish-2). Analysis of stream habitat characteristics and fish abundance revealed no relationship, or model, that was generally consistent throughout the Great Basin, though interpretable patterns were evident within some stream systems where sampling intensity happened to be sufficiently high. Thus while a landscape level sampling design was well suited to address a regional estimate of abundance, useful interpretation of fish and habitat relationships appeared to be embedded within the stream level of organization, and could not be addressed by the variable probability sampling design set for a minimal sampling intensity. Title: The Distribution and Abundance of Great Basin Redband Trout: An Application of Variable Probability Sampling in a 1999 Status Review Abstract -- Using a variable probability sampling design, streams throughout the entire range of Great Basin redband trout (Oncorhynchus mykiss ssp.) were randomly sampled use the EMAP sampling protocol, such that 35 sample sites were apportioned to each of six subbasins (Silver Lake, Lake Abert, Goose Lake, Warner Valley, Catlow Valley, and Malheur Lakes). A total of 185 sites (out of a target of 210) were visited by three-person crews that conducted habitat surveys and population estimates in sample reaches whose length were nearly 20 times their channel width. A minimal sampling intensity was based on previously encountered levels of between site variance in abundance estimates for the species. The population estimate for age 1+ redband trout was 948,852 fish (+/– 21%), with confidence limits ranging from 26% to 43% of individual subbasin estimates. Age 1+ fish abundance in terms of density (fish m-2) showed no significant differences between any subbasin, while there were significant differences in biomass (g m-2), where one subbasin had significantly higher (Catlow Valley) biomasses, and one significantly lower (Goose Lake). These comparisons were supported by like differences in mean weight (g fish-2). Analysis of stream habitat characteristics and fish abundance revealed no relationship, or model, that was generally consistent throughout the Great Basin, though interpretable patterns were evident within some stream systems where sampling intensity happened to be sufficiently high. Thus while a landscape level sampling design was well suited to address a regional estimate of abundance, useful interpretation of fish and habitat relationships appeared to be embedded within the stream level of organization, and could not be addressed by the variable probability sampling design set for a minimal sampling intensity. Close

• 22. [Article] Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2003

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2003 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2003 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 23. [Article] Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2004

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2004 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Annual Report 2004 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 24. [Article] Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Technical Report 2005

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Technical Report 2005 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Escapement and Productivity of Spring Chinook and Summer Steelhead in the John Day River Basin - Technical Report 2005 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 25. [Article] Escapement and Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2006

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Escapement and Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2006 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Escapement and Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2006 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 26. [Article] Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2007

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2007 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2007 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 27. [Article] Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2008

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2008 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2008 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 28. [Article] Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2009

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2009 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2009 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 29. [Article] Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2010

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2010 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2010 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 30. [Article] Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2011

  Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, ...

  Citation × Citation Citation Abstract Copy Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2011 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Title: Productivity of Spring Chinook Salmon and Summer Steelhead in the John Day River Basin - Annual Technical Report 2011 Abstract -- The John Day River subbasin supports one of the last remaining intact wild populations of spring Chinook salmon and summer steelhead in the Columbia River Basin. These populations, however, remain depressed relative to historic levels. Between the completion of the life history and natural escapement study in 1984 and the start of this project in 1998, spring Chinook spawning surveys did not provide adequate information to assess age structure, progeny-to-parent production values, smolt-to-adult survival (SAR), or natural spawning escapement. Further, only very limited information is available for steelhead life history, escapement, and productivity measures in the John Day subbasin. Numerous habitat protection and rehabilitation projects to improve salmonid freshwater production and survival have also been implemented in the basin and are in need of effectiveness monitoring. While our monitoring efforts outlined here will not specifically measure the effectiveness of any particular project, they will provide much needed background information for developing context for project-specific effectiveness monitoring efforts. To meet the data needs as index stocks, to assess the long-term effectiveness of habitat projects, and to differentiate freshwater and ocean survival, sufficient annual estimates of spawner escapement, age structure, SAR, egg-to-smolt survival, smolt-per-redd ratio, and freshwater habitat use are essential. We have begun to meet this need through spawning ground surveys initiated for spring Chinook salmon in 1998 and smolt PIT-tagging efforts initiated in 1999. Additional sampling and analyses to meet these goals include an estimate of smolt abundance and SAR rates, and an updated measure of the freshwater distribution of critical life stages. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 31. [Article] Fish Research Project Oregon; John Day Basin Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2002

  Abstract -- Spring (stream-type) chinook spawning ground surveys were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and three minor spawning areas ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; John Day Basin Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2002 Abstract -- Spring (stream-type) chinook spawning ground surveys were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and three minor spawning areas (South Fork, Camas Creek, Desolation Creek) of the John Day River during September 2001. Included in these surveys were 254.3 river kilometers (rkm; 87.6 rkm index, 91.9 rkm extensive, and 74.8 rkm exploratory) of spawning habitat. Chinook smolts were captured by beach seining while wading and with the aid of a jet boat in the Mainstem John Day River between river kilometers (rkm) 274 and 296 from February 21 to May 15, 2002. Riffles, eddies and river margins were sampled with a seine constructed of 12.7 mm mesh netting that measured 30.5 m long by 2.4 m deep with a 1.2 m x 1.2 m bag constructed of 9.5 mm mesh netting in the middle. Our sampling strategy did not include the use of standard seining sites. Instead, locations for sampling within our river kilometer reaches varied on a daily basis depending on daily discharge and success during previous sampling days. Appendix Table C-1 lists our sampling sites. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; John Day Basin Chinook Salmon Escapement and Productivity Monitoring - Annual Progress Report 2002 Abstract -- Spring (stream-type) chinook spawning ground surveys were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and three minor spawning areas (South Fork, Camas Creek, Desolation Creek) of the John Day River during September 2001. Included in these surveys were 254.3 river kilometers (rkm; 87.6 rkm index, 91.9 rkm extensive, and 74.8 rkm exploratory) of spawning habitat. Chinook smolts were captured by beach seining while wading and with the aid of a jet boat in the Mainstem John Day River between river kilometers (rkm) 274 and 296 from February 21 to May 15, 2002. Riffles, eddies and river margins were sampled with a seine constructed of 12.7 mm mesh netting that measured 30.5 m long by 2.4 m deep with a 1.2 m x 1.2 m bag constructed of 9.5 mm mesh netting in the middle. Our sampling strategy did not include the use of standard seining sites. Instead, locations for sampling within our river kilometer reaches varied on a daily basis depending on daily discharge and success during previous sampling days. Appendix Table C-1 lists our sampling sites. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 32. [Article] Size-at-Release of Imnaha River Chinook Salmon Hatchery Smolts: Does Size Matter?

  Abstract -- The Imnaha River Chinook salmon (Oncorhynchus tshawytscha) population has been supplemented with hatchery salmon since the 1982 brood year, when wild Imnaha River adults were first captured ...

  Citation × Citation Citation Abstract Copy Title: Size-at-Release of Imnaha River Chinook Salmon Hatchery Smolts: Does Size Matter? Abstract -- The Imnaha River Chinook salmon (Oncorhynchus tshawytscha) population has been supplemented with hatchery salmon since the 1982 brood year, when wild Imnaha River adults were first captured and spawned in captivity. This supplementation program has been operated under the auspices of the U.S. Fish and Wildlife Service’s Lower Snake River Compensation Plan (LSRCP) program. Data collected from research and monitoring activities are used to design and adapt culture practices to most effectively meet these management objectives. Based on the age structure of hatchery and natural spring Chinook adults from the 1982-1987 brood year returns captured at the Imnaha River weir, there was evidence that age composition differed between hatchery and natural adults (Figure 1). This finding suggested that the Imnaha River hatchery spring Chinook program was failing to meet the objective that genetic and life history characteristics of hatchery Chinook mimic those of wild Chinook. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Size-at-Release of Imnaha River Chinook Salmon Hatchery Smolts: Does Size Matter? Abstract -- The Imnaha River Chinook salmon (Oncorhynchus tshawytscha) population has been supplemented with hatchery salmon since the 1982 brood year, when wild Imnaha River adults were first captured and spawned in captivity. This supplementation program has been operated under the auspices of the U.S. Fish and Wildlife Service’s Lower Snake River Compensation Plan (LSRCP) program. Data collected from research and monitoring activities are used to design and adapt culture practices to most effectively meet these management objectives. Based on the age structure of hatchery and natural spring Chinook adults from the 1982-1987 brood year returns captured at the Imnaha River weir, there was evidence that age composition differed between hatchery and natural adults (Figure 1). This finding suggested that the Imnaha River hatchery spring Chinook program was failing to meet the objective that genetic and life history characteristics of hatchery Chinook mimic those of wild Chinook. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 33. [Article] Evaluation of a Sampling Approach to Monitor the Status of Great Basin Redband Trout in Southeastern Oregon (2007 – 2009) Information Reports number 2010-02

  Abstract -- The summer 2009 field season marked the completion of the third of a six year sampling effort to assess the distribution and abundance of redband trout (Oncorhynchus mykiss newberrii) in the ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of a Sampling Approach to Monitor the Status of Great Basin Redband Trout in Southeastern Oregon (2007 – 2009) Information Reports number 2010-02 Abstract -- The summer 2009 field season marked the completion of the third of a six year sampling effort to assess the distribution and abundance of redband trout (Oncorhynchus mykiss newberrii) in the six interior basins of Oregon’s high desert: Catlow Valley, Chewaucan, Fort Rock, Goose Lake, Malheur Lakes, and Warner Valley Species Management Units (SMUs). Across all sampling years, sites were randomly selected using Generalized Random Tessellation Stratified (GRTS) design, which provides a random spatially balanced sample allowing for statistically rigorous evaluation of status, trend and distribution at multiple spatial scales. A total of 700 site surveys were conducted over the course of the study covering nearly 2% of the entire 2,420 km sampling frame. Abundance of age-1+ redband trout at the SMU level has remained relatively stable throughout the course of this study but has decreased since intensively sampled in 1999. Estimates of landscape-wide abundance of age-1+ redband trout were of similar magnitude and had comparable precision across all three study years, averaging 878,000 + 16%. However, abundance at the SMU and population (stratum) level showed substantial variation, both spatially and inter-annually. Fish densities (fish/m) sampled at sites visited annually (2007-2009) showed significant differences between years, specifically between 2007 and 2009 in the Chewaucan and Fort Rock SMUs. Target levels of relative precision were achieved twice at the SMU level, and in approximately half of the strata. Increasing the number of sites sampled to increase precision is not likely, given limited funding. Yet, the current study design falls short of providing precise information to develop conservation management plans. Alternative sampling designs that would maximize data acquisition at the population level, while allowing for estimates of yearly variation were explored and suggested. Title: Evaluation of a Sampling Approach to Monitor the Status of Great Basin Redband Trout in Southeastern Oregon (2007 – 2009) Information Reports number 2010-02 Abstract -- The summer 2009 field season marked the completion of the third of a six year sampling effort to assess the distribution and abundance of redband trout (Oncorhynchus mykiss newberrii) in the six interior basins of Oregon’s high desert: Catlow Valley, Chewaucan, Fort Rock, Goose Lake, Malheur Lakes, and Warner Valley Species Management Units (SMUs). Across all sampling years, sites were randomly selected using Generalized Random Tessellation Stratified (GRTS) design, which provides a random spatially balanced sample allowing for statistically rigorous evaluation of status, trend and distribution at multiple spatial scales. A total of 700 site surveys were conducted over the course of the study covering nearly 2% of the entire 2,420 km sampling frame. Abundance of age-1+ redband trout at the SMU level has remained relatively stable throughout the course of this study but has decreased since intensively sampled in 1999. Estimates of landscape-wide abundance of age-1+ redband trout were of similar magnitude and had comparable precision across all three study years, averaging 878,000 + 16%. However, abundance at the SMU and population (stratum) level showed substantial variation, both spatially and inter-annually. Fish densities (fish/m) sampled at sites visited annually (2007-2009) showed significant differences between years, specifically between 2007 and 2009 in the Chewaucan and Fort Rock SMUs. Target levels of relative precision were achieved twice at the SMU level, and in approximately half of the strata. Increasing the number of sites sampled to increase precision is not likely, given limited funding. Yet, the current study design falls short of providing precise information to develop conservation management plans. Alternative sampling designs that would maximize data acquisition at the population level, while allowing for estimates of yearly variation were explored and suggested. Close

• 34. [Article] Fish Research Project Oregon; Aspects of Life History and Production of Juvenile Oncorhynchus mykiss in the Grande Ronde River Basin, Northeast Oregon - Summary Report 2001

  Abstract -- Rotary screw traps, located at four sites in the Grande Ronde River basin, were used to characterize aspects of early life history exhibited by juvenile Onchorhychus mykiss during migration ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Aspects of Life History and Production of Juvenile Oncorhynchus mykiss in the Grande Ronde River Basin, Northeast Oregon - Summary Report 2001 Abstract -- Rotary screw traps, located at four sites in the Grande Ronde River basin, were used to characterize aspects of early life history exhibited by juvenile Onchorhychus mykiss during migration years 1995-99. The Lostine, Catherine Creek and upper Grande Ronde traps captured fish as they migrated out of spawning areas into valley rearing habitats. The Grande Ronde Valley trap captured fish as they left valley habitats downstream of Catherine Creek and upper Grande Ronde River rearing habitats. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Aspects of Life History and Production of Juvenile Oncorhynchus mykiss in the Grande Ronde River Basin, Northeast Oregon - Summary Report 2001 Abstract -- Rotary screw traps, located at four sites in the Grande Ronde River basin, were used to characterize aspects of early life history exhibited by juvenile Onchorhychus mykiss during migration years 1995-99. The Lostine, Catherine Creek and upper Grande Ronde traps captured fish as they migrated out of spawning areas into valley rearing habitats. The Grande Ronde Valley trap captured fish as they left valley habitats downstream of Catherine Creek and upper Grande Ronde River rearing habitats. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 35. [Article] Trout lakes of the Oregon Cascades; A review of fish management

  Abstract -- In 1990 the author, a former Oregon Department of Fish and Wildlife (ODFW) career fish biologist, retired and began gathering material to pen a brief description of Oregon's Cascade Mountain ...

  Citation × Citation Citation Abstract Copy Title: Trout lakes of the Oregon Cascades; A review of fish management Abstract -- In 1990 the author, a former Oregon Department of Fish and Wildlife (ODFW) career fish biologist, retired and began gathering material to pen a brief description of Oregon's Cascade Mountain lakes and their trout. He shortly set the collected records aside, opting to travel and go fishing instead. Upon recent discovery of the stored information, he decided to prepare this summary, largely to provide a partial list of aging documents which might otherwise become lost or forgotten. Many reports have been written regarding Cascade Range lakes and their fish. Unfortunately, a large number of those were unpublished, so may now be difficult to find. Larson and Donaldson (1971) probably offer the most comprehensive bibliography of those reports. The reference list herein adds several documents not contained in Larson and Donaldson, but only limited effort was made to identify or include those written after the late 1980s. Title: Trout lakes of the Oregon Cascades; A review of fish management Abstract -- In 1990 the author, a former Oregon Department of Fish and Wildlife (ODFW) career fish biologist, retired and began gathering material to pen a brief description of Oregon's Cascade Mountain lakes and their trout. He shortly set the collected records aside, opting to travel and go fishing instead. Upon recent discovery of the stored information, he decided to prepare this summary, largely to provide a partial list of aging documents which might otherwise become lost or forgotten. Many reports have been written regarding Cascade Range lakes and their fish. Unfortunately, a large number of those were unpublished, so may now be difficult to find. Larson and Donaldson (1971) probably offer the most comprehensive bibliography of those reports. The reference list herein adds several documents not contained in Larson and Donaldson, but only limited effort was made to identify or include those written after the late 1980s. Close

• 36. [Article] Crooked River Fish Management Plan 1979

  Abstract -- The Crooked River is a major tributary to the Deschutes River and has the habitat to produce a good rainbow trout population, especially between Prineville Dam and Rice-Baldwin Dam. However, ...

  Citation × Citation Citation Abstract Copy Title: Crooked River Fish Management Plan 1979 Abstract -- The Crooked River is a major tributary to the Deschutes River and has the habitat to produce a good rainbow trout population, especially between Prineville Dam and Rice-Baldwin Dam. However, winter streamflow is minimal and high turbidity is common. The. river is not stocked but various ages and sizes of hatchery fish emigrate from Prineville Reservoir during periods of spill; and these fish constitute a sizable portion of the trout population in the river. The Crooked River has maintained a successful fishery on the combination of wild and hatchery (from Prinevi11e Reservoir) trout under general statewide regulations. In July 1979, the Oregon Fish and Wildlife Commission accepted the Department's recommendation to continue to manage this portion of Crooked River for wild and hatchery fish. Hatchery fish will not be stocked in this section of the river, but large numbers of hatchery trout migrate from Prineville Reservoir into the river below the dam. Title: Crooked River Fish Management Plan 1979 Abstract -- The Crooked River is a major tributary to the Deschutes River and has the habitat to produce a good rainbow trout population, especially between Prineville Dam and Rice-Baldwin Dam. However, winter streamflow is minimal and high turbidity is common. The. river is not stocked but various ages and sizes of hatchery fish emigrate from Prineville Reservoir during periods of spill; and these fish constitute a sizable portion of the trout population in the river. The Crooked River has maintained a successful fishery on the combination of wild and hatchery (from Prinevi11e Reservoir) trout under general statewide regulations. In July 1979, the Oregon Fish and Wildlife Commission accepted the Department's recommendation to continue to manage this portion of Crooked River for wild and hatchery fish. Hatchery fish will not be stocked in this section of the river, but large numbers of hatchery trout migrate from Prineville Reservoir into the river below the dam. Close

• 37. [Article] Migration and Passage of Redband Trout in the Donner und Blitzen River, 2007-2009, Information Reports Number 2009-05

  Abstract -- Movement of redband trout (Oncorhynchus mykiss gairdneri) was tracked between March 2007 and June 2009 in the Donner und Blitzen River (Blitzen River). We had three primary study objectives: ...

  Citation × Citation Citation Abstract Copy Title: Migration and Passage of Redband Trout in the Donner und Blitzen River, 2007-2009, Information Reports Number 2009-05 Abstract -- Movement of redband trout (Oncorhynchus mykiss gairdneri) was tracked between March 2007 and June 2009 in the Donner und Blitzen River (Blitzen River). We had three primary study objectives: 1) examine redband trout spawning locations and spawning migration timing, 2) evaluate redband trout passage at diversion dams, and 3) investigate seasonal migration patterns of redband trout as they relate to stream temperature dynamics. We tagged 96 redband trout with radio transmitters and 706 with PIT tags. Radio tracking included both mobile and fixed station detections. We established PIT tag readers at Cato Bridge (Rkm 1), Busse Dam (Rkm 35), Grain Camp Dam (Rkm 48), and Page Dam (Rkm 76) for additional data on large-scale movement patterns. With the PIT antennas at the three diversion dams, we placed one antenna below the dam and one at the upstream exit of the fish ladders to evaluate the passage delays at each dam. Stream temperature was recorded at 10 locations in the Blitzen River throughout the study. Scales of 257 migratory trout were interpreted for age and spawning history. Our results indicated that the majority of Blitzen redband trout migrated upstream of Page Dam to spawn and that most trout spawned in the mainstem and not the tributaries. Upstream trout migration occurred from March to July, but the peak migration occurred during late April and early May. Passage problems were recorded at two of the three dams evaluated. Trout were delayed longest at Busse Dam and 44% of radio-tagged trout that approached the dam were never able to pass. Trout experienced less delay at Grain Camp Dam and only 8% of radio-tagged trout failed to pass the dam. At Page Dam, which has a recently upgraded fish ladder, trout delays were short and only 5% of trout that approached the dam were unable to pass. Potentially stressful or lethal temperatures (>24.3°C) were recorded at all monitoring locations downstream of Fish Creek, except at the site just below Page Springs. The migratory population ranged in age from 1+ to 5+, but only age 3+ and older trout were reproductively mature. This suggests that the spring upstream migration includes both adult trout seeking suitable spawning habitats and immature trout making a seasonal habitat shift for thermal refuge. A fraction of the PIT-tagged fish were observed to make two or three migrations from below Busse Dam to above Page Dam in the spring and returning back to the lower river in the fall. We recommend prioritizing fish passage at the Busse Dam and Grain Camp Dam for conservation and enhancement efforts. Title: Migration and Passage of Redband Trout in the Donner und Blitzen River, 2007-2009, Information Reports Number 2009-05 Abstract -- Movement of redband trout (Oncorhynchus mykiss gairdneri) was tracked between March 2007 and June 2009 in the Donner und Blitzen River (Blitzen River). We had three primary study objectives: 1) examine redband trout spawning locations and spawning migration timing, 2) evaluate redband trout passage at diversion dams, and 3) investigate seasonal migration patterns of redband trout as they relate to stream temperature dynamics. We tagged 96 redband trout with radio transmitters and 706 with PIT tags. Radio tracking included both mobile and fixed station detections. We established PIT tag readers at Cato Bridge (Rkm 1), Busse Dam (Rkm 35), Grain Camp Dam (Rkm 48), and Page Dam (Rkm 76) for additional data on large-scale movement patterns. With the PIT antennas at the three diversion dams, we placed one antenna below the dam and one at the upstream exit of the fish ladders to evaluate the passage delays at each dam. Stream temperature was recorded at 10 locations in the Blitzen River throughout the study. Scales of 257 migratory trout were interpreted for age and spawning history. Our results indicated that the majority of Blitzen redband trout migrated upstream of Page Dam to spawn and that most trout spawned in the mainstem and not the tributaries. Upstream trout migration occurred from March to July, but the peak migration occurred during late April and early May. Passage problems were recorded at two of the three dams evaluated. Trout were delayed longest at Busse Dam and 44% of radio-tagged trout that approached the dam were never able to pass. Trout experienced less delay at Grain Camp Dam and only 8% of radio-tagged trout failed to pass the dam. At Page Dam, which has a recently upgraded fish ladder, trout delays were short and only 5% of trout that approached the dam were unable to pass. Potentially stressful or lethal temperatures (>24.3°C) were recorded at all monitoring locations downstream of Fish Creek, except at the site just below Page Springs. The migratory population ranged in age from 1+ to 5+, but only age 3+ and older trout were reproductively mature. This suggests that the spring upstream migration includes both adult trout seeking suitable spawning habitats and immature trout making a seasonal habitat shift for thermal refuge. A fraction of the PIT-tagged fish were observed to make two or three migrations from below Busse Dam to above Page Dam in the spring and returning back to the lower river in the fall. We recommend prioritizing fish passage at the Busse Dam and Grain Camp Dam for conservation and enhancement efforts. Close

• 38. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2013 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2013. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2013 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2013. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to modify salmon culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality, and smolt-toadult survival rate, and monitor spawning in nature by hatchery-reared salmon. This report provides information on rearing and release operations for brood year (BY) 2011 of juvenile Chinook Salmon smolts, the collection of eggs for BY 2013, numbers and characteristics of mature Chinook Salmon in the 2013 return year, the 2013 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD), and survival information (e.g., SAR, R:S) for BY 2008. These metrics document the success of these programs in meeting the LSRCP objectives for mature salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. In order to avoid confusion around whether jacks (age 3) are included with adult metrics, we will use the convention that “adults” include only ages 4 and 5 and “total” or “mature salmon” include all identifiable sexually mature salmon ages 3–5. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2013 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2013. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to modify salmon culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality, and smolt-toadult survival rate, and monitor spawning in nature by hatchery-reared salmon. This report provides information on rearing and release operations for brood year (BY) 2011 of juvenile Chinook Salmon smolts, the collection of eggs for BY 2013, numbers and characteristics of mature Chinook Salmon in the 2013 return year, the 2013 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD), and survival information (e.g., SAR, R:S) for BY 2008. These metrics document the success of these programs in meeting the LSRCP objectives for mature salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. In order to avoid confusion around whether jacks (age 3) are included with adult metrics, we will use the convention that “adults” include only ages 4 and 5 and “total” or “mature salmon” include all identifiable sexually mature salmon ages 3–5. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 39. [Article] CRTCP - Monitoring of Downstream Fish Passage at Cougar Dam in the South Fork McKenzie River, Oregon 1998-00

  Abstract -- In 1993, Oregon Department of Fish and Wildlife (ODFW) began placing adult chinook salmon that were excess to hatchery operations at McKenzie and Willamette Hatchery above Cougar Dam in an ...

  Citation × Citation Citation Abstract Copy Title: CRTCP - Monitoring of Downstream Fish Passage at Cougar Dam in the South Fork McKenzie River, Oregon 1998-00 Abstract -- In 1993, Oregon Department of Fish and Wildlife (ODFW) began placing adult chinook salmon that were excess to hatchery operations at McKenzie and Willamette Hatchery above Cougar Dam in an attempt to restore some of the biological contributions salmon made to the ecology of the South Fork McKenzie River prior to Cougar Dam construction (Table 1). Contributions included increased nutrient input to the ecosystem and an additional food source for predators, including bull trout. In addition, the progeny of these adult salmon provided a landlocked chinook fishery in the reservoir and ODFW was able to discontinue annual releases of juvenile salmon reared in ODFW hatcheries (1996). ODFW assumed most of the salmon attempting to leave the reservoir would be killed by various means upon passage through the turbines or regulating outlet. Between 1994-97, ODFW field observations provided circumstantial evidence that some juvenile chinook were surviving passage through the dam. In 1998, we began monitoring juvenile chinook migration out of the reservoir to determine the number, size, age, and mortality rate of fish passing through the turbines and regulating outlet of Cougar Dam. Title: CRTCP - Monitoring of Downstream Fish Passage at Cougar Dam in the South Fork McKenzie River, Oregon 1998-00 Abstract -- In 1993, Oregon Department of Fish and Wildlife (ODFW) began placing adult chinook salmon that were excess to hatchery operations at McKenzie and Willamette Hatchery above Cougar Dam in an attempt to restore some of the biological contributions salmon made to the ecology of the South Fork McKenzie River prior to Cougar Dam construction (Table 1). Contributions included increased nutrient input to the ecosystem and an additional food source for predators, including bull trout. In addition, the progeny of these adult salmon provided a landlocked chinook fishery in the reservoir and ODFW was able to discontinue annual releases of juvenile salmon reared in ODFW hatcheries (1996). ODFW assumed most of the salmon attempting to leave the reservoir would be killed by various means upon passage through the turbines or regulating outlet. Between 1994-97, ODFW field observations provided circumstantial evidence that some juvenile chinook were surviving passage through the dam. In 1998, we began monitoring juvenile chinook migration out of the reservoir to determine the number, size, age, and mortality rate of fish passing through the turbines and regulating outlet of Cougar Dam. Close

• 40. [Article] AI - Rearing of Juvenile Salmon in Recovering Wetlands of the Salmon River Estuary

  Abstract -- The Salmon River estuary, on the central Oregon coast, provides an excellent opportunity to study salmonid use of restored tidal marsh. The U.S. Forest Service manages the estuary as part of ...

  Citation × Citation Citation Abstract Copy Title: AI - Rearing of Juvenile Salmon in Recovering Wetlands of the Salmon River Estuary Abstract -- The Salmon River estuary, on the central Oregon coast, provides an excellent opportunity to study salmonid use of restored tidal marsh. The U.S. Forest Service manages the estuary as part of the Cascade Head Scenic Research Area with the goal to rehabilitate the estuary “to its condition prior to the existing diking and agricultural use.” To achieve this goal, the U.S. Forest Service has completed three dike removal projects at 9-year intervals beginning in 1978. These projects created a patchwork of restored marshes in various stages of recovery, providing a natural laboratory for studying marsh restoration processes and their effects on estuarine rearing salmonids. Our Sea Grant-funded research, which is a cooperative study with researchers from the University of Washington, has four objectives: (1) describe salmon species use of undiked reference and recovering marshes; (2) compare diets of juvenile salmon among reference and diked marshes of different recovery ages; (3) compare availability and distribution of prey organisms consumed by juvenile salmon; and (4) assess geomorphological and ecological indicators (“metrics”) of restored wetlands and relationships to salmon use. This report describes the results of fish distribution and abundance surveys. Results of the other objectives are described in Gray et al. (In Review). Title: AI - Rearing of Juvenile Salmon in Recovering Wetlands of the Salmon River Estuary Abstract -- The Salmon River estuary, on the central Oregon coast, provides an excellent opportunity to study salmonid use of restored tidal marsh. The U.S. Forest Service manages the estuary as part of the Cascade Head Scenic Research Area with the goal to rehabilitate the estuary “to its condition prior to the existing diking and agricultural use.” To achieve this goal, the U.S. Forest Service has completed three dike removal projects at 9-year intervals beginning in 1978. These projects created a patchwork of restored marshes in various stages of recovery, providing a natural laboratory for studying marsh restoration processes and their effects on estuarine rearing salmonids. Our Sea Grant-funded research, which is a cooperative study with researchers from the University of Washington, has four objectives: (1) describe salmon species use of undiked reference and recovering marshes; (2) compare diets of juvenile salmon among reference and diked marshes of different recovery ages; (3) compare availability and distribution of prey organisms consumed by juvenile salmon; and (4) assess geomorphological and ecological indicators (“metrics”) of restored wetlands and relationships to salmon use. This report describes the results of fish distribution and abundance surveys. Results of the other objectives are described in Gray et al. (In Review). Close

• 41. [Article] The Oregon Shore-Based Cobb Seamount Fishery, 1991-2003: Catch Summaries and Biological Observations Information Reports number 2011-03

  Abstract -- In 1991, Oregon saw the first commercial landings from a new fishery targeting widow rockfish (Sebastes entomelas) with midwater trawl gear on Cobb Seamount, approximately 280 nautical miles ...

  Citation × Citation Citation Abstract Copy Title: The Oregon Shore-Based Cobb Seamount Fishery, 1991-2003: Catch Summaries and Biological Observations Information Reports number 2011-03 Abstract -- In 1991, Oregon saw the first commercial landings from a new fishery targeting widow rockfish (Sebastes entomelas) with midwater trawl gear on Cobb Seamount, approximately 280 nautical miles (500 km) slightly northwest of the northern Oregon coast. From 1991 through 2003, approximately 5400 metric tons of widow rockfish (from all catch areas) were landed into Oregon by shore-based midwater trawlers. The Oregon Department of Fish and Wildlife sampled widow rockfish, sablefish (Anoplopoma fimbria) and other groundfish caught at Cobb Seamount during this time period, in addition to conducting routine sampling of commercial landings from areas closer to shore. Data were collected on length, age, sex, and reproductive maturity of the Cobb Seamount fish. The objectives of this study were to describe the developing fishery for widow rockfish at Cobb Seamount, and to attempt to identify biological differences between widow rockfish from Cobb Seamount and those found closer to shore. It was hoped that such differences could be used to facilitate shoreside enforcement of different fishing regulations for each area. Data collected from landings during the 1991-2003 time period suggest that compared to widow rockfish caught within 200 miles of shore (inside the U.S. Exclusive Economic Zone), the Cobb Seamount population had a smaller average overall size, and a smaller average female size-at-maturity. Title: The Oregon Shore-Based Cobb Seamount Fishery, 1991-2003: Catch Summaries and Biological Observations Information Reports number 2011-03 Abstract -- In 1991, Oregon saw the first commercial landings from a new fishery targeting widow rockfish (Sebastes entomelas) with midwater trawl gear on Cobb Seamount, approximately 280 nautical miles (500 km) slightly northwest of the northern Oregon coast. From 1991 through 2003, approximately 5400 metric tons of widow rockfish (from all catch areas) were landed into Oregon by shore-based midwater trawlers. The Oregon Department of Fish and Wildlife sampled widow rockfish, sablefish (Anoplopoma fimbria) and other groundfish caught at Cobb Seamount during this time period, in addition to conducting routine sampling of commercial landings from areas closer to shore. Data were collected on length, age, sex, and reproductive maturity of the Cobb Seamount fish. The objectives of this study were to describe the developing fishery for widow rockfish at Cobb Seamount, and to attempt to identify biological differences between widow rockfish from Cobb Seamount and those found closer to shore. It was hoped that such differences could be used to facilitate shoreside enforcement of different fishing regulations for each area. Data collected from landings during the 1991-2003 time period suggest that compared to widow rockfish caught within 200 miles of shore (inside the U.S. Exclusive Economic Zone), the Cobb Seamount population had a smaller average overall size, and a smaller average female size-at-maturity. Close

• 42. [Article] The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival and Adult Return of Hatchery-reared Chinook Salmon Oncorhynchus tshawytscha - Information Reports Number 2005-02

  Abstract -- To improve post-release survival in nature, salmon hatcheries have begun to better simulate natural conditions, such as increasing the flow rate in raceways to a rate similar to that seen in ...

  Citation × Citation Citation Abstract Copy Title: The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival and Adult Return of Hatchery-reared Chinook Salmon Oncorhynchus tshawytscha - Information Reports Number 2005-02 Abstract -- To improve post-release survival in nature, salmon hatcheries have begun to better simulate natural conditions, such as increasing the flow rate in raceways to a rate similar to that seen in nature. This “exercises” the salmon in the expectation that improving swimming ability will improve their survival during smolt migration, resulting in better survival to adulthood. We examined the effect of variable moderate flow rates (0.25-0.75 body lengths per second) on growth and physiology of juvenile chinook salmon Oncorhynchus tshawytscha and their ability to withstand acute stress, survive downstream migration and return as adults. Over the 5-8 month sampling period, mean length, weight and condition factor increased similarly in both the exercised and control groups. Mean plasma glucose levels were similar in each treatment group and peaked in early spring of each year. Hematocrit did not vary in a consistent trend for either treatment group or cohort. Hepatosomatic index (HSI) decreased in the 1994 cohort control group and increased in the 1995 cohort exercised group. In both cohorts, liver glycogen levels decreased through the winter and continued to decline in the 1994 cohort while in the 1995 cohort there was a significant peak in liver glycogen levels in each group during March 1997. Following stress, mean plasma glucose and cortisol levels increased, mean hematocrit varied inconsistently, mean HSI generally decreased, mean CSI decreased inconsistently in the 1995 cohort and mean liver glycogen level did not change. Mean survival of smolts to Lower Granite Dam did not vary between treatment groups with detection rates ranging narrowly from 58.7-60.7%. Mean percentage of adults returning at age 3 was higher for exercised salmon than for controls and a higher percentage of controls returned at age 5 than exercised salmon. Mean smolt-to-adult survival rate varied significantly between cohorts but there was no difference in mean survival rate between treatment groups. Variation within cohorts was greater between the exercised raceways than the controls, indicating that additional years of study are needed to compensate for large differences in survival between cohorts to make any conclusions regarding differences between treatments. Our results provide little evidence that rearing chinook salmon under a moderately increased and seasonally variable flow regime provided any benefit to the salmon over a steady low flow. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival and Adult Return of Hatchery-reared Chinook Salmon Oncorhynchus tshawytscha - Information Reports Number 2005-02 Abstract -- To improve post-release survival in nature, salmon hatcheries have begun to better simulate natural conditions, such as increasing the flow rate in raceways to a rate similar to that seen in nature. This “exercises” the salmon in the expectation that improving swimming ability will improve their survival during smolt migration, resulting in better survival to adulthood. We examined the effect of variable moderate flow rates (0.25-0.75 body lengths per second) on growth and physiology of juvenile chinook salmon Oncorhynchus tshawytscha and their ability to withstand acute stress, survive downstream migration and return as adults. Over the 5-8 month sampling period, mean length, weight and condition factor increased similarly in both the exercised and control groups. Mean plasma glucose levels were similar in each treatment group and peaked in early spring of each year. Hematocrit did not vary in a consistent trend for either treatment group or cohort. Hepatosomatic index (HSI) decreased in the 1994 cohort control group and increased in the 1995 cohort exercised group. In both cohorts, liver glycogen levels decreased through the winter and continued to decline in the 1994 cohort while in the 1995 cohort there was a significant peak in liver glycogen levels in each group during March 1997. Following stress, mean plasma glucose and cortisol levels increased, mean hematocrit varied inconsistently, mean HSI generally decreased, mean CSI decreased inconsistently in the 1995 cohort and mean liver glycogen level did not change. Mean survival of smolts to Lower Granite Dam did not vary between treatment groups with detection rates ranging narrowly from 58.7-60.7%. Mean percentage of adults returning at age 3 was higher for exercised salmon than for controls and a higher percentage of controls returned at age 5 than exercised salmon. Mean smolt-to-adult survival rate varied significantly between cohorts but there was no difference in mean survival rate between treatment groups. Variation within cohorts was greater between the exercised raceways than the controls, indicating that additional years of study are needed to compensate for large differences in survival between cohorts to make any conclusions regarding differences between treatments. Our results provide little evidence that rearing chinook salmon under a moderately increased and seasonally variable flow regime provided any benefit to the salmon over a steady low flow. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 43. [Article] Reducing Bycatch in Oregon's Recreational Groundfish Fishery: Experimental Results with Angling Gear Configured to Increase Bait Height Above Bottom Information Reports number 2008-03

  Abstract -- Several long-lived, late-maturing rockfish (Sebastes) species found off the U.S. west coast have been seriously depleted by overfishing and are managed under long-term rebuilding plans that ...

  Citation × Citation Citation Abstract Copy Title: Reducing Bycatch in Oregon's Recreational Groundfish Fishery: Experimental Results with Angling Gear Configured to Increase Bait Height Above Bottom Information Reports number 2008-03 Abstract -- Several long-lived, late-maturing rockfish (Sebastes) species found off the U.S. west coast have been seriously depleted by overfishing and are managed under long-term rebuilding plans that greatly restrict fishery impacts (PFMC 2006). Two of these species, canary rockfish (Sebastes pinniger) and yelloweye rockfish (S. ruberrimus), are caught in waters off Oregon and Washington as bycatch in recreational fisheries directed at black rockfish (S. melanops), yellowtail rockfish (S. flavidus), lingcod (Ophiodon elongatus) and Pacific halibut (Hippoglossus stenolepis). Recreational fishery impacts on the depleted species are constrained primarily via seasonal restrictions on the maximum depth of fishing, area closures and a ban on retention (PFMC 2006). However, needed future reductions in allowable impacts on either species could lead to more severe fishery restrictions, including bag limit reductions and seasonal or area closures (PFMC 2006). If angling gears can be developed that capture the target species effectively but are inefficient for these two bycatch species, then bag limit reductions or closures of the recreational groundfish fishery could be avoided. The nearshore recreational fishery targeting black and blue rockfish (Sebastes mystinus) also captures several rockfish species which have not been the subject of formal stock assessments. A few of these rockfish species are long-lived and considered to be more vulnerable to overfishing than black rockfish. For example, china rockfish (Sebastes nebulosus) live to at least age 78 and tiger rockfish (S. nigrocinctus) to at least age 116 (Munk 2001). Harvest strategies that are acceptable for black and blue rockfish may result in overfishing of these sympatric rockfish species. Many of these unassessed, but vulnerable, rockfish species are also species that are most closely associated with the seafloor (Love et al. 2002). Conversely, many of the target species of the recreational fishery are more semi-pelagic in their vertical distribution, in that they are frequently found at some distance above the seafloor (Love et al. 2002). Gear-based methods that maintain catch rates for semi-pelagic rockfishes but reduce rates for more demersally oriented rockfish could therefore also be helpful in successful mixed-stock management of nearshore fisheries. In this study, we tested the hypothesis that angling gear that keeps baits farther above the bottom would reduce the relative catch rates of yelloweye, canary and several demersal rockfishes, while maintaining acceptable catch rates for the semipelagic rockfish species most commonly caught off Oregon. In this report, we use the term “semi-pelagic” to specifically refer to black, blue, yellowtail, widow and redstripe rockfish (S. proriger). We use the term “demersal” to refer to rockfishes that are believed to live in close association with rocky substrate, specifically yelloweye, china (S. nebulosus), quillback (S. maliger), greenstriped (S. elongatus) and rosethorn (S. helvomaculatus) rockfishes. Title: Reducing Bycatch in Oregon's Recreational Groundfish Fishery: Experimental Results with Angling Gear Configured to Increase Bait Height Above Bottom Information Reports number 2008-03 Abstract -- Several long-lived, late-maturing rockfish (Sebastes) species found off the U.S. west coast have been seriously depleted by overfishing and are managed under long-term rebuilding plans that greatly restrict fishery impacts (PFMC 2006). Two of these species, canary rockfish (Sebastes pinniger) and yelloweye rockfish (S. ruberrimus), are caught in waters off Oregon and Washington as bycatch in recreational fisheries directed at black rockfish (S. melanops), yellowtail rockfish (S. flavidus), lingcod (Ophiodon elongatus) and Pacific halibut (Hippoglossus stenolepis). Recreational fishery impacts on the depleted species are constrained primarily via seasonal restrictions on the maximum depth of fishing, area closures and a ban on retention (PFMC 2006). However, needed future reductions in allowable impacts on either species could lead to more severe fishery restrictions, including bag limit reductions and seasonal or area closures (PFMC 2006). If angling gears can be developed that capture the target species effectively but are inefficient for these two bycatch species, then bag limit reductions or closures of the recreational groundfish fishery could be avoided. The nearshore recreational fishery targeting black and blue rockfish (Sebastes mystinus) also captures several rockfish species which have not been the subject of formal stock assessments. A few of these rockfish species are long-lived and considered to be more vulnerable to overfishing than black rockfish. For example, china rockfish (Sebastes nebulosus) live to at least age 78 and tiger rockfish (S. nigrocinctus) to at least age 116 (Munk 2001). Harvest strategies that are acceptable for black and blue rockfish may result in overfishing of these sympatric rockfish species. Many of these unassessed, but vulnerable, rockfish species are also species that are most closely associated with the seafloor (Love et al. 2002). Conversely, many of the target species of the recreational fishery are more semi-pelagic in their vertical distribution, in that they are frequently found at some distance above the seafloor (Love et al. 2002). Gear-based methods that maintain catch rates for semi-pelagic rockfishes but reduce rates for more demersally oriented rockfish could therefore also be helpful in successful mixed-stock management of nearshore fisheries. In this study, we tested the hypothesis that angling gear that keeps baits farther above the bottom would reduce the relative catch rates of yelloweye, canary and several demersal rockfishes, while maintaining acceptable catch rates for the semipelagic rockfish species most commonly caught off Oregon. In this report, we use the term “semi-pelagic” to specifically refer to black, blue, yellowtail, widow and redstripe rockfish (S. proriger). We use the term “demersal” to refer to rockfishes that are believed to live in close association with rocky substrate, specifically yelloweye, china (S. nebulosus), quillback (S. maliger), greenstriped (S. elongatus) and rosethorn (S. helvomaculatus) rockfishes. Close

• 44. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2011 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2011. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2011 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2011. Also summarized are the associated adult broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in reports prepared by each co-management agency). Overall, these data are used to modify culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2009 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2011 brood year, numbers and characteristics of adult Chinook salmon in the 2011 return year, the 2011 spawning year at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2006 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2011 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2011. Also summarized are the associated adult broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in reports prepared by each co-management agency). Overall, these data are used to modify culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2009 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2011 brood year, numbers and characteristics of adult Chinook salmon in the 2011 return year, the 2011 spawning year at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2006 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 45. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2012 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2012. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2012 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2012. Also summarized are the associated adult broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to modify fish culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality and smolt-toadult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2010 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2012 brood year, numbers and characteristics of adult Chinook salmon in the 2012 return year, the 2012 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD) monitoring, and recruit summary and age composition of the 2007 brood year. These metrics document the success of these pograms in meeting the LSRCP objectives for adult salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2012 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2012. Also summarized are the associated adult broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to modify fish culture practices, as needed, in order to optimize egg-to-smolt survival rate, smolt quality and smolt-toadult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2010 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2012 brood year, numbers and characteristics of adult Chinook salmon in the 2012 return year, the 2012 spawning year at Lookingglass Fish Hatchery and in nature, bacterial kidney disease (BKD) monitoring, and recruit summary and age composition of the 2007 brood year. These metrics document the success of these pograms in meeting the LSRCP objectives for adult salmon returning to the mitigation area above Lower Granite Dam (LGD) and for harvest below LGD. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 46. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2007

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2007 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and seven minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek, Clear Creek, and Big Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2007 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and seven minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek, Clear Creek, and Big Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 47. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2008

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2008 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and seven minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek, Clear Creek, and Big Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2008 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and seven minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek, Clear Creek, and Big Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 48. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2009

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2009 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2009 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 49. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2010

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2010 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2010 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at three rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. Two rotary screw traps were located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day River and the South Fork trap located at rkm 10 of the South Fork John Day River. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The third rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 50. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2011

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2011 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2011 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 51. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2012

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2012 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2012 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 52. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2013

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2013 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2013 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 53. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2014

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2014 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2014 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 54. [Article] Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2015

  Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2015 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Title: Chinook Salmon Productivity and Escapement Monitoring in the John Day River Basin - Annual Technical Report 2015 Abstract -- Juvenile spring Chinook and steelhead migrants were captured at two rotary screw trap sites and while seining in the Mainstem John Day River to estimate abundance, smolt-to-adult survival (SAR), and to study the life history characteristics of steelhead in the John Day River subbasin. One rotary screw trap was located in the Upper Mainstem fourth-level HUC. The Mainstem trap at rkm 326 of the Mainstem John Day. The Mainstem trap is located downstream of the confluence of the Mainstem John Day River with the South Fork John Day River. The second rotary screw trap was located on the Middle Fork John Day River at rkm 24 and is hereafter referred to as the Middle Fork trap. Spawning ground surveys for spring (stream-type) Chinook salmon were conducted in four main spawning areas (Mainstem, Middle Fork, North Fork, and Granite Creek System) and six minor spawning areas (South Fork, Camas Creek, Desolation Creek, Trail Creek, Deardorff Creek and Clear Creek) in the John Day River basin. Originator: ODFW, Eastern Oregon Fish Research (EOFR). Funded by Oregon Watershed Enhancement Board (OWEB) Close

• 55. [Article] The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival, and Adult Return of Hatchery-Reared Chinook Salmon

  Abstract -- Increasing hatchery raceway flow to a rate similar to that seen in nature exercises salmon in the expectation that improving swimming ability will result in better survival. However, insufficient ...

  Citation × Citation Citation Abstract Copy Title: The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival, and Adult Return of Hatchery-Reared Chinook Salmon Abstract -- Increasing hatchery raceway flow to a rate similar to that seen in nature exercises salmon in the expectation that improving swimming ability will result in better survival. However, insufficient water prevents most hatcheries from fully simulating natural stream currents. We examined the effect of moderate and seasonally variable flow rates (0.25–0.75 body lengths/s) on growth and physiology of juvenile Chinook salmon Oncorhynchus tshawytscha and their ability to withstand acute stress, survive downstream migration, and return as adults. Changes in salmon growth, condition, and hematocrit followed similar patterns and did not substantially vary between treatments or cohorts. Patterns of change in plasma glucose levels were also similar for each treatment. Hepatosomatic index was higher in the 1994 cohort than in the 1995 cohort and in the exercised salmon. Liver glycogen levels were higher in the 1995 cohort. Plasma glucose and cortisol levels increased after stress and were greater in the control. Hematocrit decreased following stress but did not differ between cohorts or treatments. Hepatosomatic index decreased following stress and was higher in the 1994 cohort. Liver glycogen levels did not change following stress or between treatments but were greater in the 1995 cohort. Downstream survival did not vary between cohorts or treatments. Migration time did not vary between treatments, but the 1995 cohort migrated more quickly. Harvest and stray rates were very low and did not vary between cohorts or treatments. Hatchery return, total return, and total survival rates did not vary between treatments, but the 1995 cohort had greater survival. A greater percentage of the exercised salmon returned at age 3 than was the case for the control salmon. Our results provide little evidence that rearing Chinook salmon under a moderately increased and seasonally variable flow regime confers any benefit to the salmon over that derived from a steady, low flow rate. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: The Effect of Moderately Increased and Variable Raceway Flow Rates on Juvenile Physiology, Survival, and Adult Return of Hatchery-Reared Chinook Salmon Abstract -- Increasing hatchery raceway flow to a rate similar to that seen in nature exercises salmon in the expectation that improving swimming ability will result in better survival. However, insufficient water prevents most hatcheries from fully simulating natural stream currents. We examined the effect of moderate and seasonally variable flow rates (0.25–0.75 body lengths/s) on growth and physiology of juvenile Chinook salmon Oncorhynchus tshawytscha and their ability to withstand acute stress, survive downstream migration, and return as adults. Changes in salmon growth, condition, and hematocrit followed similar patterns and did not substantially vary between treatments or cohorts. Patterns of change in plasma glucose levels were also similar for each treatment. Hepatosomatic index was higher in the 1994 cohort than in the 1995 cohort and in the exercised salmon. Liver glycogen levels were higher in the 1995 cohort. Plasma glucose and cortisol levels increased after stress and were greater in the control. Hematocrit decreased following stress but did not differ between cohorts or treatments. Hepatosomatic index decreased following stress and was higher in the 1994 cohort. Liver glycogen levels did not change following stress or between treatments but were greater in the 1995 cohort. Downstream survival did not vary between cohorts or treatments. Migration time did not vary between treatments, but the 1995 cohort migrated more quickly. Harvest and stray rates were very low and did not vary between cohorts or treatments. Hatchery return, total return, and total survival rates did not vary between treatments, but the 1995 cohort had greater survival. A greater percentage of the exercised salmon returned at age 3 than was the case for the control salmon. Our results provide little evidence that rearing Chinook salmon under a moderately increased and seasonally variable flow regime confers any benefit to the salmon over that derived from a steady, low flow rate. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 56. [Article] Chinook Salmon Recreational Fishery Creel Survey on Lookingglass Creek for the 2001 Run Year

  Abstract -- In 2001, a large number of hatchery origin Chinook salmon Oncorhynchus tshawytscha, 1,717, were expected to return to Lookingglass Creek. Most of the projected returns were from the Rapid River ...

  Citation × Citation Citation Abstract Copy Title: Chinook Salmon Recreational Fishery Creel Survey on Lookingglass Creek for the 2001 Run Year Abstract -- In 2001, a large number of hatchery origin Chinook salmon Oncorhynchus tshawytscha, 1,717, were expected to return to Lookingglass Creek. Most of the projected returns were from the Rapid River stock, a non-native hatchery stock of salmon that was no longer in use in the basin due to its non-local origin and high stray rates. Concern over potential disease transmission to Endangered Species Act listed stocks of Chinook salmon being reared at Lookingglass Fish Hatchery led to a management decision to not allow Chinook salmon spawning above the hatchery and to limit spawning to a short section of stream below the hatchery water intake. Because most returning Chinook salmon were from a stock that was no longer in use in hatchery programs in the basin and co-managers had decided that it was undesirable that they spawn in the wild, co-managers decided to remove as many as possible from the stream by providing recreational and tribal fishing opportunities. Recreational angling for Chinook salmon was allowed on Lookingglass Creek from 26 May through 1 July 2001. An intensive creel survey was conducted to monitor angling effort, catch rates and impacts on nontarget stocks and species. We conducted 1,606 angler interviews during the 2001 season on Lookingglass Creek. We estimate that 741 Chinook salmon were caught and 541 were kept by anglers. Catch rates were good throughout the season with mean catch rates of 12.0 and 12.3 h/fish in May and June, respectively, and 8.7 h/fish on 1 July. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Chinook Salmon Recreational Fishery Creel Survey on Lookingglass Creek for the 2001 Run Year Abstract -- In 2001, a large number of hatchery origin Chinook salmon Oncorhynchus tshawytscha, 1,717, were expected to return to Lookingglass Creek. Most of the projected returns were from the Rapid River stock, a non-native hatchery stock of salmon that was no longer in use in the basin due to its non-local origin and high stray rates. Concern over potential disease transmission to Endangered Species Act listed stocks of Chinook salmon being reared at Lookingglass Fish Hatchery led to a management decision to not allow Chinook salmon spawning above the hatchery and to limit spawning to a short section of stream below the hatchery water intake. Because most returning Chinook salmon were from a stock that was no longer in use in hatchery programs in the basin and co-managers had decided that it was undesirable that they spawn in the wild, co-managers decided to remove as many as possible from the stream by providing recreational and tribal fishing opportunities. Recreational angling for Chinook salmon was allowed on Lookingglass Creek from 26 May through 1 July 2001. An intensive creel survey was conducted to monitor angling effort, catch rates and impacts on nontarget stocks and species. We conducted 1,606 angler interviews during the 2001 season on Lookingglass Creek. We estimate that 741 Chinook salmon were caught and 541 were kept by anglers. Catch rates were good throughout the season with mean catch rates of 12.0 and 12.3 h/fish in May and June, respectively, and 8.7 h/fish on 1 July. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 57. [Article] Life history variability, habitat use, and migratory behavior of coastal cutthroat trout in the Salmon River, Oregon Annual Progress Report

  Abstract -- A previous study characterized a diversity of life history strategies of coastal cutthroat trout (Oncorhynchus clarki clarki) in Salmon River (Krentz 2007). In contrast to life history patterns ...

  Citation × Citation Citation Abstract Copy Title: Life history variability, habitat use, and migratory behavior of coastal cutthroat trout in the Salmon River, Oregon Annual Progress Report Abstract -- A previous study characterized a diversity of life history strategies of coastal cutthroat trout (Oncorhynchus clarki clarki) in Salmon River (Krentz 2007). In contrast to life history patterns in other Oregon estuaries (Giger 1972), cutthroat trout of all sizes resided for extended periods of time throughout the available channel habitats in Salmon River estuary. The estuarine resident population appeared to represent a significant portion of the migratory individuals, and included all age classes. Estuary growth was similar to that of their ocean migrant counterparts, and survival in the estuary was high. Because cutthroat were collected and marked primarily within the estuary (Krentz 2007), it is unclear what portion of the migrant population remained in the estuary relative to the ocean migrants, or whether the tagged group was representative of the anadromous populations. The current study was designed to track a representative sample of the downstream migrant population, and assess the relative success (survival) of the estuary and ocean migrants. Similar studies in the Columbia River documented directed and rapid migration through the estuary (Zydlewski et al. 2008, Hering et al. 2009). With one exception, cutthroat trout were not observed to rear in the estuary. In addition, many fish disappeared before reaching the ocean and few of the ocean migrants returned to the site of release. In this study we replicated the study design used in the Columbia River studies to allow comparison of estuary migration and rearing strategies between the two estuaries. The primary objective of our work in the Salmon River was to increase understanding of coastal cutthroat trout biology and the relationship between resident and migratory cutthroat. Study objectives were to: 1. Estimate the distribution and abundance of coastal cutthroat trout in the Salmon River watershed 2. Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration 3. Describe habitats used by anadromous migrants and characterize migration behavior within the Salmon River estuary 4. Estimate growth rate of estuary resident cutthroat 5. Estimate estuarine/marine survival of anadromous individuals and document return to estuary 6. Compare migratory patterns and survival with cutthroat in the Columbia River In this report, we will discuss migration patterns, habitat use, and growth. The study will be continued in 2010 to meet objectives (1), (2), and (6), and provide more detail to objectives (3), (4), and (5). Title: Life history variability, habitat use, and migratory behavior of coastal cutthroat trout in the Salmon River, Oregon Annual Progress Report Abstract -- A previous study characterized a diversity of life history strategies of coastal cutthroat trout (Oncorhynchus clarki clarki) in Salmon River (Krentz 2007). In contrast to life history patterns in other Oregon estuaries (Giger 1972), cutthroat trout of all sizes resided for extended periods of time throughout the available channel habitats in Salmon River estuary. The estuarine resident population appeared to represent a significant portion of the migratory individuals, and included all age classes. Estuary growth was similar to that of their ocean migrant counterparts, and survival in the estuary was high. Because cutthroat were collected and marked primarily within the estuary (Krentz 2007), it is unclear what portion of the migrant population remained in the estuary relative to the ocean migrants, or whether the tagged group was representative of the anadromous populations. The current study was designed to track a representative sample of the downstream migrant population, and assess the relative success (survival) of the estuary and ocean migrants. Similar studies in the Columbia River documented directed and rapid migration through the estuary (Zydlewski et al. 2008, Hering et al. 2009). With one exception, cutthroat trout were not observed to rear in the estuary. In addition, many fish disappeared before reaching the ocean and few of the ocean migrants returned to the site of release. In this study we replicated the study design used in the Columbia River studies to allow comparison of estuary migration and rearing strategies between the two estuaries. The primary objective of our work in the Salmon River was to increase understanding of coastal cutthroat trout biology and the relationship between resident and migratory cutthroat. Study objectives were to: 1. Estimate the distribution and abundance of coastal cutthroat trout in the Salmon River watershed 2. Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration 3. Describe habitats used by anadromous migrants and characterize migration behavior within the Salmon River estuary 4. Estimate growth rate of estuary resident cutthroat 5. Estimate estuarine/marine survival of anadromous individuals and document return to estuary 6. Compare migratory patterns and survival with cutthroat in the Columbia River In this report, we will discuss migration patterns, habitat use, and growth. The study will be continued in 2010 to meet objectives (1), (2), and (6), and provide more detail to objectives (3), (4), and (5). Close

• 58. [Article] Green Sturgeon Population Characteristics in Oregon, 1 October 2002 - 30 September 2003; Progress Reports 2003

  Abstract -- During May through August 2003, we used gill nets, seine nets, and an underwater video camera to attempt to capture adult and sub-adult green sturgeon Acipenser medirostris and white sturgeon ...

  Citation × Citation Citation Abstract Copy Title: Green Sturgeon Population Characteristics in Oregon, 1 October 2002 - 30 September 2003; Progress Reports 2003 Abstract -- During May through August 2003, we used gill nets, seine nets, and an underwater video camera to attempt to capture adult and sub-adult green sturgeon Acipenser medirostris and white sturgeon Acipenser transmontanus in the Umpqua River, Coos River, Coquille River, Siuslaw River, and Yaquina River, Oregon. We set 66 static gill nets for an average 1.0 hand captured no green sturgeon and 8 individual white sturgeon (114-181 cm FL). We deployed 17 seine nets for an average 0.1 hand captured no sturgeon. We deployed the underwater camera 21 times for 0.1-0.8 hand observed no sturgeon. Unmarked sturgeon were tagged with spaghetti and passive integrated transponder (PIT) tags. Field staff from Oregon Department of Fish and Wildlife's Gold Beach office sampled green sturgeon in the Rogue River. Fifty unmarked green sturgeon (136-197 cm FL) were captured in gill nets and one unmarked green sturgeon was captured angling (147 cm FL). Forty-eight of the unmarked sturgeon were tagged with spaghetti tags and 47 were tagged with PIT tags. Of these, 5 were recaptured once and 1 was a recapture from the previous year. Thirty-five fish were radio tagged, sonic tagged, or both. One juvenile green sturgeon (17-cm TL) was captured during beach-seine sampling. We interpreted ages of 27 green sturgeon from pectoral fin-spine sections collected by Oregon Depar,tment of Fish and Wildlife, Columbia River Management staff during Oregon coastal estuary sampling and estimated parameters of Von Bertalanffy growth functions using these and previously collected data. Title: Green Sturgeon Population Characteristics in Oregon, 1 October 2002 - 30 September 2003; Progress Reports 2003 Abstract -- During May through August 2003, we used gill nets, seine nets, and an underwater video camera to attempt to capture adult and sub-adult green sturgeon Acipenser medirostris and white sturgeon Acipenser transmontanus in the Umpqua River, Coos River, Coquille River, Siuslaw River, and Yaquina River, Oregon. We set 66 static gill nets for an average 1.0 hand captured no green sturgeon and 8 individual white sturgeon (114-181 cm FL). We deployed 17 seine nets for an average 0.1 hand captured no sturgeon. We deployed the underwater camera 21 times for 0.1-0.8 hand observed no sturgeon. Unmarked sturgeon were tagged with spaghetti and passive integrated transponder (PIT) tags. Field staff from Oregon Department of Fish and Wildlife's Gold Beach office sampled green sturgeon in the Rogue River. Fifty unmarked green sturgeon (136-197 cm FL) were captured in gill nets and one unmarked green sturgeon was captured angling (147 cm FL). Forty-eight of the unmarked sturgeon were tagged with spaghetti tags and 47 were tagged with PIT tags. Of these, 5 were recaptured once and 1 was a recapture from the previous year. Thirty-five fish were radio tagged, sonic tagged, or both. One juvenile green sturgeon (17-cm TL) was captured during beach-seine sampling. We interpreted ages of 27 green sturgeon from pectoral fin-spine sections collected by Oregon Depar,tment of Fish and Wildlife, Columbia River Management staff during Oregon coastal estuary sampling and estimated parameters of Von Bertalanffy growth functions using these and previously collected data. Close

• 59. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2008 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2008. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2008 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2008. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency. Overall, these data are used to modify culture practices as needed in order to optimize the egg-to-smolt survival, smolt quality, smolt-to-adult survival rate, and to track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2006 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2008 brood year, Chinook spawning in nature, numbers and characteristics of adult Chinook salmon in the 2008 return year, recruit summary and age composition of the 2003 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2008 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2008. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency. Overall, these data are used to modify culture practices as needed in order to optimize the egg-to-smolt survival, smolt quality, smolt-to-adult survival rate, and to track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2006 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2008 brood year, Chinook spawning in nature, numbers and characteristics of adult Chinook salmon in the 2008 return year, recruit summary and age composition of the 2003 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 60. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2009 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2009. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2009 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2009. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, the Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency. Overall, these data are used to modify culture practices, as needed, in order to optimize the egg-to-smolt survival, smolt quality, and smolt-toadult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2007 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2009 brood year, numbers and characteristics of adult Chinook salmon in the 2009 return year, spawning at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2004 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2009 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2009. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, the Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency. Overall, these data are used to modify culture practices, as needed, in order to optimize the egg-to-smolt survival, smolt quality, and smolt-toadult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2007 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2009 brood year, numbers and characteristics of adult Chinook salmon in the 2009 return year, spawning at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2004 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 61. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2010 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2010. Also summarized are the ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2010 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2010. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, the Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency). Overall, these data are used to modify culture practices, as needed, in order to optimize egg-to-smolt survival, smolt quality, and smolt-to-adult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2008 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2010 brood year, numbers and characteristics of adult Chinook salmon in the 2010 return year, the 2010 spawning year at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2005 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2010 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2010. Also summarized are the associated adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers, the Nez Perce Tribe (NPT) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (Our co-managers, CTUIR and NPT, have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River, that are discussed and evaluated in reports prepared by each co-management agency). Overall, these data are used to modify culture practices, as needed, in order to optimize egg-to-smolt survival, smolt quality, and smolt-to-adult survival rate, and track spawning in nature by hatchery-reared adults. This report provides information on rearing and release operations for the 2008 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2010 brood year, numbers and characteristics of adult Chinook salmon in the 2010 return year, the 2010 spawning year at Lookingglass Fish Hatchery and in nature, recruit summary and age composition of the 2005 brood year, and bacterial kidney disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 62. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2015 Annual Progress Report

  Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2015 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2015 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 63. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2016 Annual Progress Report

  Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2016 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2016 Annual Progress Report Abstract -- This annual progress report summarizes spring-summer Chinook Salmon monitoring data collected by ODFW for the Lower Snake River Compensation Plan (LSRCP) facilities in 2015. Also summarized are the associated broodstock monitoring data collected at weirs in the Grande Ronde Basin that are operated by our co-managers, the Nez Perce Tribe (NPT; Lostine River) and Confederated Tribes of the Umatilla Indian Reservation (CTUIR; Catherine Creek and Upper Grande Ronde River). The main objectives of this report are to document and evaluate spring-sumer Chinook Salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins (CTUIR and NPT have specific program goals for Chinook returns to Catherine Creek, the Upper Grande Ronde River, Lookingglass Creek, and the Lostine River that are discussed and evaluated in separate reports prepared by each co-management agency). Overall, these data are used to adaptively manage salmon culture practices in order to optimize egg-to-smolt survival rate, smolt quality, smolt-toadult survival rate, the recruits-per-spawner (R:S) ratio, and to monitor spawning in nature by hatchery-reared salmon. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 64. [Article] Willamette Biological Opinion Hatchery Research 2002-2005 Final Report

  Abstract -- RECOMMENDATIONS 1. The number of hatchery Chinook spawning with wild fish upstream of Leaburg Dam should be reduced. The percentage of carcasses from hatchery fish in spawning areas upstream ...

  Citation × Citation Citation Abstract Copy Title: Willamette Biological Opinion Hatchery Research 2002-2005 Final Report Abstract -- RECOMMENDATIONS 1. The number of hatchery Chinook spawning with wild fish upstream of Leaburg Dam should be reduced. The percentage of carcasses from hatchery fish in spawning areas upstream of the dam averaged over 30% in 2001–2004, with percentages exceeding 60% in the South Fork McKenzie River and areas downstream. The number of hatchery adults could be reduced by reducing the number of hatchery smolts released in the McKenzie River, by excluding hatchery adults from passing Leaburg Dam, by increasing the percentage of returning hatchery fish that home to the hatchery, or by a combination of these actions. 2. The number of hatchery and naturally produced Chinook spawning naturally, the number and distribution of redds and age at return of naturally produced Chinook should be determined annually for each of the Chinook populations in the Upper Willamette ESU. 3. Video recording systems should be installed at Bennett dams on the North Santiam and at Lebanon Dam on the South Santiam to count adipose clipped and non fin-clipped Chinook, and winter steelhead. 4. The extent and causes of pre-spawning mortality of Chinook in the North Santiam, South Santiam and Middle Fork Willamette rivers should be determined. High pre-spawning mortality in these rivers could limit natural production. 5. Rearing and release methods for hatchery spring Chinook smolts should be evaluated and modified to reduce straying by returning adults to streams other than where they were released. Rearing and release strategies for hatchery Chinook should be evaluated (e.g., outmigration and use of rearing habitat) for potential effects on wild juvenile chinook. 6. The number of naturally produced Chinook incorporated into hatchery broodstocks should be monitored by collecting and analyzing otoliths of non fin-clipped fish. 7. The number of Chinook fry consumed by hatchery rainbow trout in the McKenzie River could be substantial and needs to be determined. 8. Restricting the trout season in Foster Reservoir to late April or late May through October and delaying releases of hatchery trout would better protect wild steelhead smolts, and would be consistent with regulations for North Fork Reservoir (Clackamas River) where there is a fishery for stocked trout and naturally produced steelhead smolts are also present. 9. Samples should be collected from wild steelhead smolts in the North Santiam and South Santiam to determine the extent of natural reproduction by summer steelhead and genetic introgression with native winter steelhead. Title: Willamette Biological Opinion Hatchery Research 2002-2005 Final Report Abstract -- RECOMMENDATIONS 1. The number of hatchery Chinook spawning with wild fish upstream of Leaburg Dam should be reduced. The percentage of carcasses from hatchery fish in spawning areas upstream of the dam averaged over 30% in 2001–2004, with percentages exceeding 60% in the South Fork McKenzie River and areas downstream. The number of hatchery adults could be reduced by reducing the number of hatchery smolts released in the McKenzie River, by excluding hatchery adults from passing Leaburg Dam, by increasing the percentage of returning hatchery fish that home to the hatchery, or by a combination of these actions. 2. The number of hatchery and naturally produced Chinook spawning naturally, the number and distribution of redds and age at return of naturally produced Chinook should be determined annually for each of the Chinook populations in the Upper Willamette ESU. 3. Video recording systems should be installed at Bennett dams on the North Santiam and at Lebanon Dam on the South Santiam to count adipose clipped and non fin-clipped Chinook, and winter steelhead. 4. The extent and causes of pre-spawning mortality of Chinook in the North Santiam, South Santiam and Middle Fork Willamette rivers should be determined. High pre-spawning mortality in these rivers could limit natural production. 5. Rearing and release methods for hatchery spring Chinook smolts should be evaluated and modified to reduce straying by returning adults to streams other than where they were released. Rearing and release strategies for hatchery Chinook should be evaluated (e.g., outmigration and use of rearing habitat) for potential effects on wild juvenile chinook. 6. The number of naturally produced Chinook incorporated into hatchery broodstocks should be monitored by collecting and analyzing otoliths of non fin-clipped fish. 7. The number of Chinook fry consumed by hatchery rainbow trout in the McKenzie River could be substantial and needs to be determined. 8. Restricting the trout season in Foster Reservoir to late April or late May through October and delaying releases of hatchery trout would better protect wild steelhead smolts, and would be consistent with regulations for North Fork Reservoir (Clackamas River) where there is a fishery for stocked trout and naturally produced steelhead smolts are also present. 9. Samples should be collected from wild steelhead smolts in the North Santiam and South Santiam to determine the extent of natural reproduction by summer steelhead and genetic introgression with native winter steelhead. Close

• 65. [Article] Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2008

  Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2008 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2008 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 66. [Article] Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2009

  Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2009 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. Originator: ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2009 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. Originator: ODFW, Eastern Oregon Fish Research (EOFR) Close

• 67. [Article] Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2010

  Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2010 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. Originator: ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Implementation of the Environmental Monitoring and Assessment Program (EMAP) Protocol in the John Day Subbasin of the Columbia Plateau Province - Annual Technical Report 2010 Abstract -- The Independent Scientific Review Panel (ISRP), in their guidance on monitoring, strongly recommended that the region move away from index surveys and embrace probabilistic sampling for most population and habitat monitoring. To meet the ISRP’s recommendation, the structure and methods employed by the Oregon Plan for Salmon and Watersheds Monitoring Program were extended to the John Day basin. This approach incorporates the sampling strategy of the U.S. Environmental Protection Agency’s (EPA’s) Environmental Monitoring and Assessment Program (EMAP). The EMAP is a long-term research effort with a statistically based and spatially explicit sampling design. This program applies a rigorous, Tier-2 sampling design to answer key monitoring questions, integrate on-going sampling efforts, and improve agency coordination. EMAP objectives specific to the John Day basin are to determine annual estimates of steelhead spawner escapement, hatchery to wild steelhead stray ratios, juvenile steelhead and other salmonid rearing distributions, physical habitat conditions, and track changes in the status and trends of these estimates over time. In addition, data from on-going projects in the basin, such as smolt monitoring, will be incorporated in future years to develop a more complete picture of status and trends in resources (e.g. life-stage specific survival) not targeted under the EMAP program. This project provides information as directed under two measures of the Columbia Basin Fish and Wildlife Program. Measure 4.3C specifies that key indicator naturally spawning populations should be monitored to provide detailed stock status information. In addition, measure 7.1C identifies the need for collection of population status, life history, and other data on wild and naturally spawning populations. This project was developed in direct response to the recommendations and needs of regional modeling efforts, the ISRP, the Fish and Wildlife Program, the Oregon Plan for Salmon and Watersheds, and the Columbia Basin Fish and Wildlife Authority Multi-Year Implementation Plan. Originator: ODFW, Eastern Oregon Fish Research (EOFR) Close

• 68. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2001 Annual Progress Report

  Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2001. The main objective of this report is to document and evaluate ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2001 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2001. The main objective of this report is to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 1999 and 2000 cohorts of juvenile Chinook salmon, the collection, spawning, and adult characteristics for the 2001 return of adult Chinook salmon, and the collection of eggs for the 2001 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2001 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2001. The main objective of this report is to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 1999 and 2000 cohorts of juvenile Chinook salmon, the collection, spawning, and adult characteristics for the 2001 return of adult Chinook salmon, and the collection of eggs for the 2001 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 69. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2002 Annual Progress Report

  Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2002. The main objectives of this report are to document and evaluate ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2002 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2002. The main objectives of this report are to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2000 and 2001 cohorts of juvenile Chinook salmon, the collection, spawning and adult characteristics for the 2002 return of adult Chinook salmon, and the collection of eggs for the 2002 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2002 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2002. The main objectives of this report are to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2000 and 2001 cohorts of juvenile Chinook salmon, the collection, spawning and adult characteristics for the 2002 return of adult Chinook salmon, and the collection of eggs for the 2002 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 70. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2003 Annual Progress Report

  Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2003. The main objectives of this report are to document and evaluate ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2003 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2003. The main objectives of this report are to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2001 cohort of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics for the 2003 return of adult Chinook salmon, and the collection of eggs for the 2003 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2003 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2003. The main objectives of this report are to document and evaluate salmon culture performance for spring Chinook salmon hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2001 cohort of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics for the 2003 return of adult Chinook salmon, and the collection of eggs for the 2003 cohort. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 71. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2004 Annual Progress Report

  Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2004. Also summarized are adult broodstock monitoring data collected ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2004 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2004. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2002 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics for the 2004 return of adult Chinook salmon, and the collection of eggs for the 2004 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2004 Annual Progress Report Abstract -- This report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2004. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, and smolt-to-adult survival rate, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2002 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics for the 2004 return of adult Chinook salmon, and the collection of eggs for the 2004 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 72. [Article] Klamath Mountains Province Steelhead Project, 1999 Annual Report Report Number: OPSW-ODFW-2002-09

  Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial ...

  Citation × Citation Citation Abstract Copy Title: Klamath Mountains Province Steelhead Project, 1999 Annual Report Report Number: OPSW-ODFW-2002-09 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define “sustainable and productive” by committing the Oregon Department of Fish and Wildlife (ODFW) to establish “Population Health Goals” for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the “half-pounder” run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990a; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and as juveniles of the respective races cannot be differentiated, some population health goals will have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent. Busby et al. (1994) concluded that the steelhead in this ESU “is not now at risk of extinction, but if present trends continue, it is likely to become so in the foreseeable future”. In contrast, Chilcote (1998) concluded that almost all steelhead populations in the Oregon portion of the ESU “are relatively healthy and certainly do not warrant listing as threatened under the ESA”. Uncertainty as to the status of the resource, coupled with the comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in all streams except the Rogue River, lead the National Marine Fisheries Service to defer a listing of KMP steelhead under the Endangered Species Act. However, KMP steelhead remained a candidate species during 1999. The goal of this project is to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives include (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals. Attainment of all of the population health goals will likely indicate that the populations of wild steelhead in the KMP are healthy and may allow managers to restore harvest opportunities for wild fish. Conversely, failure to attain any of the population health goals will likely indicate that the populations are depressed and would likely lead to actions designed to minimize fishing mortality. However, in most years it is likely that some goals will be attained while some will not be attained. Under that scenario, and depending on which goals are attained, selective fisheries, like the current one for wild winter steelhead in the Rogue River, remain as viable options for fishery managers. Title: Klamath Mountains Province Steelhead Project, 1999 Annual Report Report Number: OPSW-ODFW-2002-09 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define “sustainable and productive” by committing the Oregon Department of Fish and Wildlife (ODFW) to establish “Population Health Goals” for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the “half-pounder” run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990a; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and as juveniles of the respective races cannot be differentiated, some population health goals will have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent. Busby et al. (1994) concluded that the steelhead in this ESU “is not now at risk of extinction, but if present trends continue, it is likely to become so in the foreseeable future”. In contrast, Chilcote (1998) concluded that almost all steelhead populations in the Oregon portion of the ESU “are relatively healthy and certainly do not warrant listing as threatened under the ESA”. Uncertainty as to the status of the resource, coupled with the comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in all streams except the Rogue River, lead the National Marine Fisheries Service to defer a listing of KMP steelhead under the Endangered Species Act. However, KMP steelhead remained a candidate species during 1999. The goal of this project is to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives include (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals. Attainment of all of the population health goals will likely indicate that the populations of wild steelhead in the KMP are healthy and may allow managers to restore harvest opportunities for wild fish. Conversely, failure to attain any of the population health goals will likely indicate that the populations are depressed and would likely lead to actions designed to minimize fishing mortality. However, in most years it is likely that some goals will be attained while some will not be attained. Under that scenario, and depending on which goals are attained, selective fisheries, like the current one for wild winter steelhead in the Rogue River, remain as viable options for fishery managers. Close

• 73. [Article] Klamath Mountains Province Steelhead Project, 2000-01 Annual Report Report Number: OPSW-ODFW-2003-08

  Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial ...

  Citation × Citation Citation Abstract Copy Title: Klamath Mountains Province Steelhead Project, 2000-01 Annual Report Report Number: OPSW-ODFW-2003-08 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define "sustainable and productive" by committing the Oregon Department of Fish and Wildlife (ODFW) to establish "Population Health Goals" for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the "half-pounder" run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and as juveniles of the respective races cannot be differentiated, some population health goals will have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent. Busby et al. (1994) concluded that the steelhead in this ESU “is not now at risk of extinction, but if present trends continue, it is likely to become so in the foreseeable future”. In contrast, Chilcote (1998) concluded that almost all steelhead populations in the Oregon portion of the ESU "are relatively healthy and certainly do not warrant listing as threatened under the ESA". Uncertainty as to the status of the resource, coupled with the comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in all streams except the Rogue River, lead the National Marine Fisheries Service to defer a listing of KMP steelhead under the Endangered Species Act. However, KMP steelhead remained a candidate species during 2000. The goal of this project is to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives include (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals. Directed sampling began in 1999 and the findings from 1999 were reported by Satterthwaite (2002a). Title: Klamath Mountains Province Steelhead Project, 2000-01 Annual Report Report Number: OPSW-ODFW-2003-08 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define "sustainable and productive" by committing the Oregon Department of Fish and Wildlife (ODFW) to establish "Population Health Goals" for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the "half-pounder" run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and as juveniles of the respective races cannot be differentiated, some population health goals will have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent. Busby et al. (1994) concluded that the steelhead in this ESU “is not now at risk of extinction, but if present trends continue, it is likely to become so in the foreseeable future”. In contrast, Chilcote (1998) concluded that almost all steelhead populations in the Oregon portion of the ESU "are relatively healthy and certainly do not warrant listing as threatened under the ESA". Uncertainty as to the status of the resource, coupled with the comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in all streams except the Rogue River, lead the National Marine Fisheries Service to defer a listing of KMP steelhead under the Endangered Species Act. However, KMP steelhead remained a candidate species during 2000. The goal of this project is to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives include (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals. Directed sampling began in 1999 and the findings from 1999 were reported by Satterthwaite (2002a). Close

• 74. [Article] Klamath Mountains Province Steelhead Project, 2001-02 Annual Report Report Number: OPSW-ODFW-2004-08

  Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial ...

  Citation × Citation Citation Abstract Copy Title: Klamath Mountains Province Steelhead Project, 2001-02 Annual Report Report Number: OPSW-ODFW-2004-08 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define "sustainable and productive" by committing the Oregon Department of Fish and Wildlife (ODFW) to establish "Population Health Goals" for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the "half-pounder" run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and, as juveniles of the respective races cannot be differentiated, some population health goals have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent from historic sources of information. Uncertainty about resource status, coupled with a comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in almost all KMP streams, lead the National Marine Fisheries Service (NMFS), in 1998, to defer a listing of KMP steelhead under the Endangered Species Act. On 30 March, 2001, NMFS announced that, after a review of new information, that an Endangered Species Act listing was not warranted for KMP steelhead. In 2002, ODFW adopted new methods to monitor steelhead populations on the Oregon coast. Allied with the decision, ODFW decided to terminate the KMP steelhead project. Consequently, this report presents findings from the third, and final, year of the project. The goal of the project was to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives included (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals Satterthwaite (2002a). Directed sampling began in 1999 and findings from the first two years of the project were reported by Satterthwaite (2002b) and Satterthwaite (2003). Title: Klamath Mountains Province Steelhead Project, 2001-02 Annual Report Report Number: OPSW-ODFW-2004-08 Abstract -- The steelhead supplement to the Oregon Plan for Salmon and Watersheds (OSPW) is intended to maintain wild steelhead populations in Oregon at sustainable and productive levels that provide substantial environmental, cultural, and economic benefits. The OSPW attempts to better define "sustainable and productive" by committing the Oregon Department of Fish and Wildlife (ODFW) to establish "Population Health Goals" for each Evolutionary Significant Unit (ESU) of wild steelhead within the state. In addition, section ODFW IB1S of the plan calls for ODFW to assess adult escapement and juvenile production of wild steelhead in each ESU. The National Marine Fisheries Service identified seven ESUs for steelhead in Oregon and concluded that steelhead produced in coastal basins between Cape Blanco in southern Oregon and the Klamath River Basin in northern California constitutes one ESU. This area closely corresponds to the geologic boundaries of the Klamath Mountains Province (KMP). Steelhead in the KMP differ from those in adjoining areas because of distinctive life history and genetic characteristics (Busby et al. 1994). Primary differences in life history parameters have been identified for wild KMP steelhead. Summer steelhead and winter steelhead differ in time of return as adults, tendency to return to fresh water on a false spawning migration (the "half-pounder" run), age at ocean entry, growth rate and migration patterns of juveniles in fresh water (ODFW 1990; ODFW 1994). As a result of these differences, separate health goals seem warranted for summer and winter steelhead populations. Winter steelhead inhabit streams throughout the KMP, while summer steelhead are found only in a portion of the Rogue River Basin. However, the distribution of summer and winter steelhead overlap in major areas of the Rogue River Basin (Everest 1973) and, as juveniles of the respective races cannot be differentiated, some population health goals have to apply to both races. The status of wild steelhead in the Klamath Mountains Province ESU is not readily apparent from historic sources of information. Uncertainty about resource status, coupled with a comprehensive conservation plan developed by Oregon and the termination of wild fish harvest in almost all KMP streams, lead the National Marine Fisheries Service (NMFS), in 1998, to defer a listing of KMP steelhead under the Endangered Species Act. On 30 March, 2001, NMFS announced that, after a review of new information, that an Endangered Species Act listing was not warranted for KMP steelhead. In 2002, ODFW adopted new methods to monitor steelhead populations on the Oregon coast. Allied with the decision, ODFW decided to terminate the KMP steelhead project. Consequently, this report presents findings from the third, and final, year of the project. The goal of the project was to develop and implement assessment methods to determine the status of wild steelhead in the Oregon portion of the KMP. Project objectives included (1) develop population health goals and allied monitoring methods and (2) determine resource status in relation to health goals Satterthwaite (2002a). Directed sampling began in 1999 and findings from the first two years of the project were reported by Satterthwaite (2002b) and Satterthwaite (2003). Close

• 75. [Article] Life History Variability, Habitat Use, and Migratory Behavior of Coastal Cutthroat Trout in the Salmon River, Oregon Report Number: OPSW-ODFW-2012-10

  Abstract -- Coast basins in Oregon support resident and anadromous cutthroat trout (Oncorhynchus clarki clarki). Cutthroat trout isolated above barriers are stream resident, but those with access to river, ...

  Citation × Citation Citation Abstract Copy Title: Life History Variability, Habitat Use, and Migratory Behavior of Coastal Cutthroat Trout in the Salmon River, Oregon Report Number: OPSW-ODFW-2012-10 Abstract -- Coast basins in Oregon support resident and anadromous cutthroat trout (Oncorhynchus clarki clarki). Cutthroat trout isolated above barriers are stream resident, but those with access to river, estuary, and marine environments may express a variety of life history and migratory patterns. Past studies (e.g. Giger 1972, Sumner 1972, Tipping 1981) indicated that estuaries serve primarily as a migratory corridor or short-term rearing environment. However, recent advances in marking and tracking technology have permitted researchers to gain a better understanding of the complex migratory and habitat use patterns of cutthroat. Krentz (2007) conducted studies in Salmon River on the central Oregon coast to explore migratory patterns of cutthroat and examine the role of the estuary as a rearing environment. Coastal cutthroat trout reared for extended periods of time throughout the available channel habitats in Salmon River estuary (Krentz 2007) during spring, summer, and fall. The estuarine resident population appeared to represent a significant portion of the migratory individuals, and included all older age classes. Estuary growth was similar to that of their ocean migrant counterparts, and survival in the estuary was high. Because cutthroat were collected and marked primarily within the estuary (Krentz 2007), it is unclear what portion of the migrant population reared in the estuary relative to the watershed or ocean, or whether the tagged group was representative of the migratory populations. The current study was designed to track a representative sample of the downstream migrant population, and assess the relative success (survival) of the estuary and ocean migrants. Similar studies in the Columbia River documented directed and rapid migration through the estuary (Zydlewski et al. 2008, Hering et al. 2009). With rare exception, cutthroat trout were not observed to rear in the estuary. In addition, many fish disappeared before reaching the ocean and few of the ocean migrants returned to the natal tributary. In this study we replicated the study design used in the Columbia River studies to further comparisons of estuary migration and rearing strategies between the two estuaries. The primary objective of our work in the Salmon River was to increase understanding of coastal cutthroat trout biology and the relationship between stream-resident and migratory, or “sea-run” cutthroat. Here we use the term “sea-run” to indicate migration into the tidally-inundated, or estuarine portions of the Salmon River watershed or to the ocean. Study objectives were to: 1.Estimate the distribution and abundance of coastal cutthroat trout in the Salmon River watershed 2.Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration 3.Describe estuary habitats used by sea-run migrants and characterize behavior within the Salmon River estuary 4.Estimate growth rate of stream and estuary resident cutthroat 5.Estimate estuary and ocean survival of sea-run individuals and document return to estuary and lower river. 6.Compare migratory behavior in Salmon River to that observed in the lower Columbia River Title: Life History Variability, Habitat Use, and Migratory Behavior of Coastal Cutthroat Trout in the Salmon River, Oregon Report Number: OPSW-ODFW-2012-10 Abstract -- Coast basins in Oregon support resident and anadromous cutthroat trout (Oncorhynchus clarki clarki). Cutthroat trout isolated above barriers are stream resident, but those with access to river, estuary, and marine environments may express a variety of life history and migratory patterns. Past studies (e.g. Giger 1972, Sumner 1972, Tipping 1981) indicated that estuaries serve primarily as a migratory corridor or short-term rearing environment. However, recent advances in marking and tracking technology have permitted researchers to gain a better understanding of the complex migratory and habitat use patterns of cutthroat. Krentz (2007) conducted studies in Salmon River on the central Oregon coast to explore migratory patterns of cutthroat and examine the role of the estuary as a rearing environment. Coastal cutthroat trout reared for extended periods of time throughout the available channel habitats in Salmon River estuary (Krentz 2007) during spring, summer, and fall. The estuarine resident population appeared to represent a significant portion of the migratory individuals, and included all older age classes. Estuary growth was similar to that of their ocean migrant counterparts, and survival in the estuary was high. Because cutthroat were collected and marked primarily within the estuary (Krentz 2007), it is unclear what portion of the migrant population reared in the estuary relative to the watershed or ocean, or whether the tagged group was representative of the migratory populations. The current study was designed to track a representative sample of the downstream migrant population, and assess the relative success (survival) of the estuary and ocean migrants. Similar studies in the Columbia River documented directed and rapid migration through the estuary (Zydlewski et al. 2008, Hering et al. 2009). With rare exception, cutthroat trout were not observed to rear in the estuary. In addition, many fish disappeared before reaching the ocean and few of the ocean migrants returned to the natal tributary. In this study we replicated the study design used in the Columbia River studies to further comparisons of estuary migration and rearing strategies between the two estuaries. The primary objective of our work in the Salmon River was to increase understanding of coastal cutthroat trout biology and the relationship between stream-resident and migratory, or “sea-run” cutthroat. Here we use the term “sea-run” to indicate migration into the tidally-inundated, or estuarine portions of the Salmon River watershed or to the ocean. Study objectives were to: 1.Estimate the distribution and abundance of coastal cutthroat trout in the Salmon River watershed 2.Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration 3.Describe estuary habitats used by sea-run migrants and characterize behavior within the Salmon River estuary 4.Estimate growth rate of stream and estuary resident cutthroat 5.Estimate estuary and ocean survival of sea-run individuals and document return to estuary and lower river. 6.Compare migratory behavior in Salmon River to that observed in the lower Columbia River Close

• 76. [Article] Abundance, distribution, and migratory behavior of coastal cutthroat trout in two lower Columbia River tributaries

  Abstract -- Coastal cutthroat trout (Oncorhynchus clarki clarki) exhibit multiple life history types characterized by diverse migratory strategies, including anadromous, potomodromous, and freshwater resident ...

  Citation × Citation Citation Abstract Copy Title: Abundance, distribution, and migratory behavior of coastal cutthroat trout in two lower Columbia River tributaries Abstract -- Coastal cutthroat trout (Oncorhynchus clarki clarki) exhibit multiple life history types characterized by diverse migratory strategies, including anadromous, potomodromous, and freshwater resident forms. The factors contributing to life history variation within populations are not well understood, but probably are not strictly genetic (e.g. Johnson et al, in review). Variation in migration tendency within cutthroat populations may result from phenotype plasticity, influenced by density, frequency, or condition dependent processes (Hendry et al. 2004). For example, an individual cutthroat’s choice to migrate at a given time or age may be a response to environmental conditions mediated by a genetically determined reaction norm (Hutchings 2004). This report summarizes a study undertaken to describe the expression of migratory behavior within coastal cutthroat trout populations, the relationship among migratory and non-migratory individuals, and the implications of life history diversity for management of cutthroat trout in tributaries of the lower Columbia River. The relationship between resident and migratory populations (or resident and migratory individuals within populations) is of central importance for management of coastal cutthroat trout. In the lower Columbia River and southwest Washington State a proposed rule to list anadromous cutthroat as threatened under the federal Endangered Species Act (ESA) was withdrawn after the US Fish and Wildlife Service (USFWS) decided during its review process to include resident and anadromous forms in the same Distinct Population Segment (DPS). Debate over proposed ESA listing highlighted a general lack of knowledge about coastal cutthroat trout life history, relationships between resident and migratory forms, and estuarine habitat use in the lower Columbia River. In 2009, the decision not to list the DPS as threatened was remanded to the USFWS on the grounds that the Service had not adequately considered whether marine and estuarine habitats formed a significant portion of the range of the DPS (USFWS 2009). We evaluated the distribution and abundance of coastal cutthroat trout in Big Creek and Bear Creek, two tributaries that join the Columbia River estuary from the south (Oregon) side roughly 30 kilometers from the ocean, and monitored the migratory behavior of cutthroat that emigrated from these streams and entered the Columbia River estuary. Big Creek is an interesting system because a fish weir and diversion dam at an ODFW hatchery, established in 1941 and refurbished in 1957, prevent cutthroat trout from passing upstream, isolating the cutthroat spawning population above the hatchery. Despite this barrier to upstream migration, offspring of resident cutthroat in the upper watershed continue to “smolt” and migrate downstream past the barrier. We were interested in the fate of these fish and their contribution to the adult population. Bear Creek, on the other hand, has always had full access for anadromous cutthroat through much of its drainage. These two systems permit a comparison of life history characteristics, migration, and survival of coastal cutthroat rearing in streams above and below migration barriers, and provide study sites in Oregon to compliment research by USFWS of coastal cutthroat migration behavior in tributaries entering the estuary from the north side of the Columbia River (USFWS 2008; and see Hudson et al. 2008; Johnson 2008; Zydlewski et al. 2008). A major objective of our work in Big Creek and Bear Creek was to increase understanding of coastal cutthroat trout biology and the relationship between resident and migratory cutthroat in lower Columbia tributaries. Additionally, we sought to document habitat use in the Columbia River estuary by migrant cutthroat. Our specific objectives were to: • Estimate abundance of coastal cutthroat trout in Big Creek (above hatchery barrier) and Bear Creek (above and below a large dam) • Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration • Describe habitats used by anadromous migrants and characterize migration behavior within the Columbia River estuary • Measure estuarine/marine survival of anadromous individuals and document return to natal streams Title: Abundance, distribution, and migratory behavior of coastal cutthroat trout in two lower Columbia River tributaries Abstract -- Coastal cutthroat trout (Oncorhynchus clarki clarki) exhibit multiple life history types characterized by diverse migratory strategies, including anadromous, potomodromous, and freshwater resident forms. The factors contributing to life history variation within populations are not well understood, but probably are not strictly genetic (e.g. Johnson et al, in review). Variation in migration tendency within cutthroat populations may result from phenotype plasticity, influenced by density, frequency, or condition dependent processes (Hendry et al. 2004). For example, an individual cutthroat’s choice to migrate at a given time or age may be a response to environmental conditions mediated by a genetically determined reaction norm (Hutchings 2004). This report summarizes a study undertaken to describe the expression of migratory behavior within coastal cutthroat trout populations, the relationship among migratory and non-migratory individuals, and the implications of life history diversity for management of cutthroat trout in tributaries of the lower Columbia River. The relationship between resident and migratory populations (or resident and migratory individuals within populations) is of central importance for management of coastal cutthroat trout. In the lower Columbia River and southwest Washington State a proposed rule to list anadromous cutthroat as threatened under the federal Endangered Species Act (ESA) was withdrawn after the US Fish and Wildlife Service (USFWS) decided during its review process to include resident and anadromous forms in the same Distinct Population Segment (DPS). Debate over proposed ESA listing highlighted a general lack of knowledge about coastal cutthroat trout life history, relationships between resident and migratory forms, and estuarine habitat use in the lower Columbia River. In 2009, the decision not to list the DPS as threatened was remanded to the USFWS on the grounds that the Service had not adequately considered whether marine and estuarine habitats formed a significant portion of the range of the DPS (USFWS 2009). We evaluated the distribution and abundance of coastal cutthroat trout in Big Creek and Bear Creek, two tributaries that join the Columbia River estuary from the south (Oregon) side roughly 30 kilometers from the ocean, and monitored the migratory behavior of cutthroat that emigrated from these streams and entered the Columbia River estuary. Big Creek is an interesting system because a fish weir and diversion dam at an ODFW hatchery, established in 1941 and refurbished in 1957, prevent cutthroat trout from passing upstream, isolating the cutthroat spawning population above the hatchery. Despite this barrier to upstream migration, offspring of resident cutthroat in the upper watershed continue to “smolt” and migrate downstream past the barrier. We were interested in the fate of these fish and their contribution to the adult population. Bear Creek, on the other hand, has always had full access for anadromous cutthroat through much of its drainage. These two systems permit a comparison of life history characteristics, migration, and survival of coastal cutthroat rearing in streams above and below migration barriers, and provide study sites in Oregon to compliment research by USFWS of coastal cutthroat migration behavior in tributaries entering the estuary from the north side of the Columbia River (USFWS 2008; and see Hudson et al. 2008; Johnson 2008; Zydlewski et al. 2008). A major objective of our work in Big Creek and Bear Creek was to increase understanding of coastal cutthroat trout biology and the relationship between resident and migratory cutthroat in lower Columbia tributaries. Additionally, we sought to document habitat use in the Columbia River estuary by migrant cutthroat. Our specific objectives were to: • Estimate abundance of coastal cutthroat trout in Big Creek (above hatchery barrier) and Bear Creek (above and below a large dam) • Quantify the proportions of the cutthroat populations that are migratory, identify which individuals migrate and describe the timing of migration • Describe habitats used by anadromous migrants and characterize migration behavior within the Columbia River estuary • Measure estuarine/marine survival of anadromous individuals and document return to natal streams Close

• 77. [Article] Warner Sucker Investigations (2009)

  Abstract -- The Warner sucker (Catostomus warnerensis) is endemic to the Warner Valley, an endorheic subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. Historically, this species ...

  Citation × Citation Citation Abstract Copy Title: Warner Sucker Investigations (2009) Abstract -- The Warner sucker (Catostomus warnerensis) is endemic to the Warner Valley, an endorheic subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. Historically, this species was abundant and its range included three permanent lakes (Hart, Crump, and Pelican), several ephemeral lakes, a network of sloughs and diversion canals, and three major tributary drainages (Honey, Deep, and Twentymile Creeks) (U.S. Fish and Wildlife Service 1985). Warner sucker abundance and distribution has declined over the past century and it was federally listed as threatened in 1985 due to habitat fragmentation and threats posed by the proliferation of piscivorous non-native game fishes (U.S. Fish and Wildlife Service 1985). The Warner sucker inhabits the lakes and low gradient stream reaches of the Warner Valley. The Warner sucker metapopulation is comprised of both lake and stream life history morphs. The lake suckers are lacustrine adfluvial or potamodromous fish that normally spawn in the streams. However, upstream migration may be blocked by low stream flows during low water years or by irrigation diversion dams. When this happens, spawning may occur in nearshore areas of the lakes (White et al. 1990). Large lake-dwelling populations of introduced fishes likely reduce recruitment by preying on young suckers (U.S. Fish and Wildlife Service 1998). The stream suckers inhabit and spawn in Honey, Deep, and Twentymile Creeks. The Recovery Plan for the Threatened and Rare Native Fishes of the Warner Basin and Alkali Subbasin (U.S. Fish and Wildlife Service 1998) sets recovery criteria for delisting the species. These criteria require that: 1) a self-sustaining metapopulation is distributed throughout the Twentymile, Honey, and Deep Creek (below the falls) drainages, and in Pelican, Crump, and Hart Lakes, 2) passage is restored within and among the Twentymile, Honey, and Deep Creek (below the falls) drainages so that the individual populations of Warner suckers can function as a metapopulation, and 3) no threats exist that would likely threaten the survival of the species over a significant portion of its range. Objectives of our 2009 investigations included: 1) obtain a mark-recapture population estimate for suckers in the Twentymile Creek drainage and describe their current distribution, 2) describe associations between the distribution of suckers and habitat variables in Twentymile Creek, 3) evaluate a non-lethal ageing technique, 4) track radiotagged lake suckers (tagged in 2008) in Hart and Crump Lakes to assess spring movement patterns, 5) track spring spawning movements of lake suckers across a PIT-tag antenna installed at the mouth of Honey Creek, 6) test the feasibility of trapping larval suckers near the mouth of Honey Creek using larval drift nets and light traps to describe the relative abundance and timing of larval sucker movements, and 7) obtain a mark-recapture population estimate of suckers at the Summer Lake Wildlife Management Area (WMA), where a self-sustaining population became established after a fish salvage from Hart Lake during the 1991 drought. Title: Warner Sucker Investigations (2009) Abstract -- The Warner sucker (Catostomus warnerensis) is endemic to the Warner Valley, an endorheic subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. Historically, this species was abundant and its range included three permanent lakes (Hart, Crump, and Pelican), several ephemeral lakes, a network of sloughs and diversion canals, and three major tributary drainages (Honey, Deep, and Twentymile Creeks) (U.S. Fish and Wildlife Service 1985). Warner sucker abundance and distribution has declined over the past century and it was federally listed as threatened in 1985 due to habitat fragmentation and threats posed by the proliferation of piscivorous non-native game fishes (U.S. Fish and Wildlife Service 1985). The Warner sucker inhabits the lakes and low gradient stream reaches of the Warner Valley. The Warner sucker metapopulation is comprised of both lake and stream life history morphs. The lake suckers are lacustrine adfluvial or potamodromous fish that normally spawn in the streams. However, upstream migration may be blocked by low stream flows during low water years or by irrigation diversion dams. When this happens, spawning may occur in nearshore areas of the lakes (White et al. 1990). Large lake-dwelling populations of introduced fishes likely reduce recruitment by preying on young suckers (U.S. Fish and Wildlife Service 1998). The stream suckers inhabit and spawn in Honey, Deep, and Twentymile Creeks. The Recovery Plan for the Threatened and Rare Native Fishes of the Warner Basin and Alkali Subbasin (U.S. Fish and Wildlife Service 1998) sets recovery criteria for delisting the species. These criteria require that: 1) a self-sustaining metapopulation is distributed throughout the Twentymile, Honey, and Deep Creek (below the falls) drainages, and in Pelican, Crump, and Hart Lakes, 2) passage is restored within and among the Twentymile, Honey, and Deep Creek (below the falls) drainages so that the individual populations of Warner suckers can function as a metapopulation, and 3) no threats exist that would likely threaten the survival of the species over a significant portion of its range. Objectives of our 2009 investigations included: 1) obtain a mark-recapture population estimate for suckers in the Twentymile Creek drainage and describe their current distribution, 2) describe associations between the distribution of suckers and habitat variables in Twentymile Creek, 3) evaluate a non-lethal ageing technique, 4) track radiotagged lake suckers (tagged in 2008) in Hart and Crump Lakes to assess spring movement patterns, 5) track spring spawning movements of lake suckers across a PIT-tag antenna installed at the mouth of Honey Creek, 6) test the feasibility of trapping larval suckers near the mouth of Honey Creek using larval drift nets and light traps to describe the relative abundance and timing of larval sucker movements, and 7) obtain a mark-recapture population estimate of suckers at the Summer Lake Wildlife Management Area (WMA), where a self-sustaining population became established after a fish salvage from Hart Lake during the 1991 drought. Close

• 78. [Article] Abundance, Productivity, and Life History of Fifteenmile Creek Steelhead; Annual Report 2016

  Abstract -- The Fifteenmile Creek watershed in North Central Oregon hosts a native population of steelhead (Oncorhynchus mykiss) that is without influence of previous hatchery augmentation. The Fifteenmile ...

  Citation × Citation Citation Abstract Copy Title: Abundance, Productivity, and Life History of Fifteenmile Creek Steelhead; Annual Report 2016 Abstract -- The Fifteenmile Creek watershed in North Central Oregon hosts a native population of steelhead (Oncorhynchus mykiss) that is without influence of previous hatchery augmentation. The Fifteenmile Creek steelhead are a subpopulation within the Distinct Population Segment (DPS) of the Middle Columbia River steelhead and was listed as ‘threatened’ by the National Marine Fisheries Service (NMFS) first on March 25, 1999 and relisted as a DPS on January 5, 2006. Subsequently, a conservation and recovery management plan was developed for the Middle Columbia River steelhead DPS within Oregon state borders. The goal of the plan is to recover Middle Columbia River steelhead to a level that would allow the removal of threatened status, in addition to providing a long-term goal to recover the population sufficiently to provide sustainable fisheries and other ecological, cultural, social and economic benefits for future generations. The DPS-level recovery plan sets specific recovery goals for the areas within the DPS, which designates Fifteenmile Creek explicitly. The Fifteenmile Creek steelhead population is considered the most inland winter race of steelhead in the Columbia River Basin, as designated by NOAA fisheries. However review of this designation may be necessary at the next Federal Columbia River Power System (FCRPS) Biological Opinion (BiOp) status-review because the run-timing of adult steelhead passing Bonneville Dam has been inconsistent with known winter-run steelhead in the area. The population was identified as “must have viable” status by the Interior Columbia Technical Recovery Team (ICTRT), and reaching viable status is essential for achieving DPS delisting. The ICTRT, Recovery Plan, and the Federal Columbia River Power System (FCRPS-BiOp) have all identified this population as high priority for improving precision and accuracy of abundance, productivity, diversity, and spatial structure information. Title: Abundance, Productivity, and Life History of Fifteenmile Creek Steelhead; Annual Report 2016 Abstract -- The Fifteenmile Creek watershed in North Central Oregon hosts a native population of steelhead (Oncorhynchus mykiss) that is without influence of previous hatchery augmentation. The Fifteenmile Creek steelhead are a subpopulation within the Distinct Population Segment (DPS) of the Middle Columbia River steelhead and was listed as ‘threatened’ by the National Marine Fisheries Service (NMFS) first on March 25, 1999 and relisted as a DPS on January 5, 2006. Subsequently, a conservation and recovery management plan was developed for the Middle Columbia River steelhead DPS within Oregon state borders. The goal of the plan is to recover Middle Columbia River steelhead to a level that would allow the removal of threatened status, in addition to providing a long-term goal to recover the population sufficiently to provide sustainable fisheries and other ecological, cultural, social and economic benefits for future generations. The DPS-level recovery plan sets specific recovery goals for the areas within the DPS, which designates Fifteenmile Creek explicitly. The Fifteenmile Creek steelhead population is considered the most inland winter race of steelhead in the Columbia River Basin, as designated by NOAA fisheries. However review of this designation may be necessary at the next Federal Columbia River Power System (FCRPS) Biological Opinion (BiOp) status-review because the run-timing of adult steelhead passing Bonneville Dam has been inconsistent with known winter-run steelhead in the area. The population was identified as “must have viable” status by the Interior Columbia Technical Recovery Team (ICTRT), and reaching viable status is essential for achieving DPS delisting. The ICTRT, Recovery Plan, and the Federal Columbia River Power System (FCRPS-BiOp) have all identified this population as high priority for improving precision and accuracy of abundance, productivity, diversity, and spatial structure information. Close

• 79. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2005 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2005. Also summarized are adult broodstock monitoring ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2005 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2005. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and successful spawning in nature by hatcheryreared adults, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2003 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics of adult Chinook salmon in the 2005 return year, and the collection of eggs for the 2005 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2005 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2005. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and successful spawning in nature by hatcheryreared adults, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2003 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics of adult Chinook salmon in the 2005 return year, and the collection of eggs for the 2005 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 80. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2006 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2006. Also summarized are adult broodstock monitoring ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2006 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2006. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and successful spawning in nature by hatcheryreared adults, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2004 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics of adult Chinook salmon in the 2006 return year, and the collection of eggs for the 2006 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2006 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2006. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize egg-to-smolt survival rate, smolt quality, smolt-to-adult survival rate, and successful spawning in nature by hatcheryreared adults, as well as to provide information to adapt the programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2004 brood year of juvenile Chinook salmon smolts, the collection, spawning, and adult characteristics of adult Chinook salmon in the 2006 return year, and the collection of eggs for the 2006 brood year. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 81. [Article] Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2007 Annual Progress Report

  Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2007. Also summarized are adult broodstock monitoring ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2007 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2007. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize eggto-smolt survival rate, smolt quality, smolt-to-adult survival rate, successful spawning in nature by hatchery-reared adults, and to provide information to adapt programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2005 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2007 brood year, Chinook spawning in nature, adult characteristics of adult Chinook salmon in the 2007 return year, and Bacterial Kidney Disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Spring Chinook Salmon Evaluation Studies - 2007 Annual Progress Report Abstract -- This annual progress report summarizes spring Chinook salmon monitoring data for the Lower Snake River Compensation Plan (LSRCP) facilities in 2007. Also summarized are adult broodstock monitoring data collected in the Grande Ronde Basin by our co-managers the Nez Perce Tribe (NPT) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR). The main objectives of this report are to document and evaluate spring Chinook salmon culture performance for hatchery programs and achievement of management objectives in the Imnaha and Grande Ronde river basins. These data are used to design culture practices to optimize eggto-smolt survival rate, smolt quality, smolt-to-adult survival rate, successful spawning in nature by hatchery-reared adults, and to provide information to adapt programs to most effectively meet management objectives. This report provides information on rearing and release operations for the 2005 brood year of juvenile Chinook salmon smolts, the collection of eggs for the 2007 brood year, Chinook spawning in nature, adult characteristics of adult Chinook salmon in the 2007 return year, and Bacterial Kidney Disease (BKD) monitoring. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 82. [Article] Oregon North Coast Spring Chinook Stock Assessment – 2005-06 Information Reports 2008-01

  Abstract -- Chinook salmon populations of the Oregon coast exhibit two general life history types, classified as either spring-run or fall-run depending on adult life-history traits. Fall chinook are present ...

  Citation × Citation Citation Abstract Copy Title: Oregon North Coast Spring Chinook Stock Assessment – 2005-06 Information Reports 2008-01 Abstract -- Chinook salmon populations of the Oregon coast exhibit two general life history types, classified as either spring-run or fall-run depending on adult life-history traits. Fall chinook are present in most Oregon coastal basins, and the Oregon Department of Fish and Wildlife (ODFW) has identified 28 fall chinook populations in this area (ODFW 2005). Spring chinook salmon are found in larger river basins on the Oregon coast, and the upper portions of the Umpqua and Rogue rivers. This is a more limited distribution than coastal fall chinook and includes only 10 populations (ODFW 2005). Oregon coastal fall chinook stocks have been monitored through a set of 56 standard spawning ground surveys, many conducted since the 1950’s. There has not been a similar, consistent, coast-wide monitoring program for Oregon coastal spring chinook spawners. Abundance of these populations has been monitoring through a variety of methods including; freshwater harvest estimates, counts at dams and weirs, summer resting hole counts, and spawning ground surveys. In 1998, the National Marine Fisheries Service (NMFS) reviewed west coast chinook salmon populations in regards to status under the Federal Endangered Species Act (ESA). The NMFS identified a total of 15 Evolutionarily Significant Units (ESUs) of chinook salmon (Myers et al. 1998). Oregon coastal chinook are predominantly in the Oregon Coast ESU (Necanicum River to Elk River). This ESU includes both spring and fall chinook, and was determined to not warrant listing (Federal Register Notice 1998). In 2005, ODFW conducted a review of Oregon native fish status, in regards to the State’s Native Fish Conservation Policy. This review grouped populations by Species Management Unit (SMU), and examined coastal spring and fall chinook populations separately. The review determined the near-term sustainability of the Coastal Fall Chinook SMU was not at risk, but the Coastal Spring Chinook SMU was at risk (ODFW 2005). The Tillamook and Nestucca spring chinook populations were of particular concern because they failed to pass the interim criteria for abundance, productivity, and reproductive independence. Hatchery supplementation of spring chinook has occurred in the Tillamook and Nestucca basins since the early 1900’s. Currently, approximately 450,000 spring chinook smolts are released annually from Trask Hatchery, Cedar Creek Hatchery (Nestucca), and from a STEP program at Whiskey Creek. These hatchery smolts have been mass marked with an adipose fin clip since the 1998 brood year. Therefore, hatchery origin adult spring chinook may now be positively identified by the lack of an adipose fin. Declining trends in wild coastal spring chinook populations have resulted in management actions to target harvest on adipose fin clipped hatchery fish, and to restrict harvest of wild origin fish. Results of status reviews, and changes in management practices have required a more thorough evaluation of stock status for the Tillamook and Nestucca spring chinook populations (Keith Braun, personal communication). Therefore, ODFW developed a monitoring plan for spring chinook in these basins. The monitoring plan identified four project objectives; 1) Determine adult spring chinook abundance in the Trask, Wilson, and Nestucca Rivers, 2) Determine hatchery vs. wild ratios for these three basins, 3) Determine age structure and sex ratios for adult spawners, and 4) Determine distribution and abundance for spring chinook recycled from local ODFW hatcheries. This project began in 2004 with an exploratory season to determine distribution, survey methodology, and feasibility of the proposed protocol. In 2005 and 2006 a more intensive sampling effort was implemented, designed to cover the entire distribution of spring chinook spawning in the Nestucca, Trask, and Wilson rivers. Since 2004, project field work has been funded with Restoration and Enhancement Program (R&E) funds, administered by Oregon Department of Fish and Wildlife. Project administration is covered through existing funding for the ODFW Oregon Adult Salmonid Inventory and Sampling Project (OASIS). Funding from R&E is scheduled to continue through the 2008 spawning season. Further monitoring will require a new funding source for project field work. This report documents results for project Objectives 1 to 4, including the abundance and distribution of spring chinook spawners during 2005 and 2006 in Oregon’s Trask, Wilson, and Nestucca river basins. Title: Oregon North Coast Spring Chinook Stock Assessment – 2005-06 Information Reports 2008-01 Abstract -- Chinook salmon populations of the Oregon coast exhibit two general life history types, classified as either spring-run or fall-run depending on adult life-history traits. Fall chinook are present in most Oregon coastal basins, and the Oregon Department of Fish and Wildlife (ODFW) has identified 28 fall chinook populations in this area (ODFW 2005). Spring chinook salmon are found in larger river basins on the Oregon coast, and the upper portions of the Umpqua and Rogue rivers. This is a more limited distribution than coastal fall chinook and includes only 10 populations (ODFW 2005). Oregon coastal fall chinook stocks have been monitored through a set of 56 standard spawning ground surveys, many conducted since the 1950’s. There has not been a similar, consistent, coast-wide monitoring program for Oregon coastal spring chinook spawners. Abundance of these populations has been monitoring through a variety of methods including; freshwater harvest estimates, counts at dams and weirs, summer resting hole counts, and spawning ground surveys. In 1998, the National Marine Fisheries Service (NMFS) reviewed west coast chinook salmon populations in regards to status under the Federal Endangered Species Act (ESA). The NMFS identified a total of 15 Evolutionarily Significant Units (ESUs) of chinook salmon (Myers et al. 1998). Oregon coastal chinook are predominantly in the Oregon Coast ESU (Necanicum River to Elk River). This ESU includes both spring and fall chinook, and was determined to not warrant listing (Federal Register Notice 1998). In 2005, ODFW conducted a review of Oregon native fish status, in regards to the State’s Native Fish Conservation Policy. This review grouped populations by Species Management Unit (SMU), and examined coastal spring and fall chinook populations separately. The review determined the near-term sustainability of the Coastal Fall Chinook SMU was not at risk, but the Coastal Spring Chinook SMU was at risk (ODFW 2005). The Tillamook and Nestucca spring chinook populations were of particular concern because they failed to pass the interim criteria for abundance, productivity, and reproductive independence. Hatchery supplementation of spring chinook has occurred in the Tillamook and Nestucca basins since the early 1900’s. Currently, approximately 450,000 spring chinook smolts are released annually from Trask Hatchery, Cedar Creek Hatchery (Nestucca), and from a STEP program at Whiskey Creek. These hatchery smolts have been mass marked with an adipose fin clip since the 1998 brood year. Therefore, hatchery origin adult spring chinook may now be positively identified by the lack of an adipose fin. Declining trends in wild coastal spring chinook populations have resulted in management actions to target harvest on adipose fin clipped hatchery fish, and to restrict harvest of wild origin fish. Results of status reviews, and changes in management practices have required a more thorough evaluation of stock status for the Tillamook and Nestucca spring chinook populations (Keith Braun, personal communication). Therefore, ODFW developed a monitoring plan for spring chinook in these basins. The monitoring plan identified four project objectives; 1) Determine adult spring chinook abundance in the Trask, Wilson, and Nestucca Rivers, 2) Determine hatchery vs. wild ratios for these three basins, 3) Determine age structure and sex ratios for adult spawners, and 4) Determine distribution and abundance for spring chinook recycled from local ODFW hatcheries. This project began in 2004 with an exploratory season to determine distribution, survey methodology, and feasibility of the proposed protocol. In 2005 and 2006 a more intensive sampling effort was implemented, designed to cover the entire distribution of spring chinook spawning in the Nestucca, Trask, and Wilson rivers. Since 2004, project field work has been funded with Restoration and Enhancement Program (R&E) funds, administered by Oregon Department of Fish and Wildlife. Project administration is covered through existing funding for the ODFW Oregon Adult Salmonid Inventory and Sampling Project (OASIS). Funding from R&E is scheduled to continue through the 2008 spawning season. Further monitoring will require a new funding source for project field work. This report documents results for project Objectives 1 to 4, including the abundance and distribution of spring chinook spawners during 2005 and 2006 in Oregon’s Trask, Wilson, and Nestucca river basins. Close

• 83. [Article] Status and Distribution of Native Fishes in the Goose Lake Basin Information Reports number 2008-02

  Abstract -- This study describes the current distribution of the nine native fish species in the Oregon portion of the Goose Lake basin (Lake County): Goose Lake redband trout Oncorhynchus mykiss ssp., ...

  Citation × Citation Citation Abstract Copy Title: Status and Distribution of Native Fishes in the Goose Lake Basin Information Reports number 2008-02 Abstract -- This study describes the current distribution of the nine native fish species in the Oregon portion of the Goose Lake basin (Lake County): Goose Lake redband trout Oncorhynchus mykiss ssp., Goose Lake lamprey Entosphenus sp., Goose Lake tui chub Siphateles bicolor thalassinus, Goose Lake sucker Catostomus occidentalis lacusanserinus, Modoc sucker Catostomus microps, Pit-Klamath brook lamprey Entosphenus lethophagus, speckled dace Rhinichthys osculus, Pit roach Lavinia symmetricus mitrulus, and Pit sculpin Cottus pitensis. The Goose Lake basin is an endorheic, or topographically closed basin located in south central Oregon and northeastern California. The basin is within the usually closed northeastern extremity of the adjoining Sacramento River basin, astride the Oregon-California boundary. Although most of the lake lies in California, most of its valley and nearly two-thirds of the total drainage area (~722 sq. mi.) are in Oregon. The largest streams in the basin are Drews, Cottonwood, and Thomas Creeks. Annual precipitation averages about 36 cm per year (Phillips and van Denburgh 1971). Goose Lake overflowed briefly into the North Fork Pit River in 1868 and 1881, but storage and diversion of irrigation water has substantially reduced the inflow and future overflow is unlikely (USGS 1971). The lakebed was dry in the summers of 1926, 1929- 1934, and 1992. About half the basin is forestland, 20% is hay fields and pastureland, and 16% is shrub and rangeland. Currently, almost 35% of the inflow is diverted for irrigation (OWRD 1989). The Goose Lake basin is home to four endemic fish taxa: the Goose Lake redband trout, lamprey, sucker, and tui chub. Endemic fishes of the Goose Lake basin split their life histories between Goose Lake and its tributaries, as opposed to the five native but non-endemic species that primarily occupy stream habitats. Pit roach and all endemic fishes except Goose Lake tui chub are listed as a “species of concern” by the USFWS, a designation that implies there is concern about species viability, but not enough information is known to initiate a listing review for threatened or endangered status. The Modoc sucker was listed as a federally endangered species in 1985 (USFWS 1985). No formal recovery plan was required due to an existing “Action Plan for the Recovery of the Modoc Sucker” (USFWS 1984). Most of the recovery actions outlined in the action plan were either completed or are no longer relevant (Stewart Reid, Western Fishes, personal communication). However, actions 26 and 27 pertaining to range expansion remain incomplete. Action 26 suggests reclassification to threatened upon establishment of safe populations (for 3-5 years) throughout the Rush and Turner Creek watersheds in the Pit River basin. Action 27 suggests delisting upon establishing safe populations in two other historic streams. At the time of listing, the historic range of Modoc sucker was thought to have included only two small tributaries of the Pit River in Modoc and Lassen Counties, Ash and Turner Creeks (USFWS 1985). Therefore, a major recovery goal was to expand the species’ range with additional populations (USFWS 1984). In 2001, reexamination of historical documents and museum specimens established that Modoc suckers had also historically occupied Thomas Creek in the Goose Lake basin. Field collections in 2001, with subsequent morphological and genetic analysis, confirmed that the population was still present in Thomas Creek (Stewart Reid, Western Fishes, personal communication); however, the broader range of Modoc sucker in the Goose Lake watershed was not known. In 1995, the Goose Lake Fishes Working Group drafted a conservation plan for “prelisting” recovery of all native fish in response to severe drought and habitat degradation (GLFWG 1995). The Aquatic Inventories Project of the Oregon Department of Fish and Wildlife (ODFW) conducted habitat and fish distribution surveys (1991-1995) to obtain baseline information to help inform recovery efforts (ODFW, unpublished data). Since then, field work to monitor the distribution and abundance of Goose Lake fishes has been limited and sporadic, targeting only Goose Lake redband trout and Modoc sucker (Dambacher 2001; Reid 2007). No comprehensive follow up work has been conducted to evaluate fish response to climatic conditions, habitat restoration projects, and continued irrigation activities. ODFW recently drafted a status review of native fish of Oregon (ODFW 2005). Except for redband trout, Goose Lake fishes were not included in the status review due to a lack of new information since the previous status review in 1995 (Kostow et al. 1995). Further, the review of Goose Lake redband trout was limited by a lack of long-term data series. The first objective of this study was to document the current distribution of native fishes in Oregon’s portion of the Goose Lake basin and assess changes in distribution that may have occurred since the last surveys were conducted 12 years ago. The second objective was to provide new information about the distribution of Modoc suckers within the basin. The third objective was to determine relative abundance and age-class diversity of native fishes at randomly selected sample sites. All objectives were addressed throughout the potential riverine distribution of fish in the Oregon portion of the Goose Lake basin. Information gathered in this study is critical to effective conservation and management of each species and its habitat. In addition, this report describes the distribution and relative abundance of nonnative fishes (fathead minnow (Pimephales promelas), brown bullhead (Ameiurus nebulosus), white crappie (Pomoxis annularis), yellow perch (Perca flavescens), pumpkinseed (Lepomis gibbosus), and brook trout (Salvelinus fontinalis)) in the basin. Unlike prior efforts, this study used a statisticallybased design to select sample points with the aim of achieving a representative sample across the Oregon portion of the Goose Lake watershed. Additionally, a wide array of fish sampling gear was employed to maximize our ability to capture all fish species present across the diversity of habitat types encountered. Title: Status and Distribution of Native Fishes in the Goose Lake Basin Information Reports number 2008-02 Abstract -- This study describes the current distribution of the nine native fish species in the Oregon portion of the Goose Lake basin (Lake County): Goose Lake redband trout Oncorhynchus mykiss ssp., Goose Lake lamprey Entosphenus sp., Goose Lake tui chub Siphateles bicolor thalassinus, Goose Lake sucker Catostomus occidentalis lacusanserinus, Modoc sucker Catostomus microps, Pit-Klamath brook lamprey Entosphenus lethophagus, speckled dace Rhinichthys osculus, Pit roach Lavinia symmetricus mitrulus, and Pit sculpin Cottus pitensis. The Goose Lake basin is an endorheic, or topographically closed basin located in south central Oregon and northeastern California. The basin is within the usually closed northeastern extremity of the adjoining Sacramento River basin, astride the Oregon-California boundary. Although most of the lake lies in California, most of its valley and nearly two-thirds of the total drainage area (~722 sq. mi.) are in Oregon. The largest streams in the basin are Drews, Cottonwood, and Thomas Creeks. Annual precipitation averages about 36 cm per year (Phillips and van Denburgh 1971). Goose Lake overflowed briefly into the North Fork Pit River in 1868 and 1881, but storage and diversion of irrigation water has substantially reduced the inflow and future overflow is unlikely (USGS 1971). The lakebed was dry in the summers of 1926, 1929- 1934, and 1992. About half the basin is forestland, 20% is hay fields and pastureland, and 16% is shrub and rangeland. Currently, almost 35% of the inflow is diverted for irrigation (OWRD 1989). The Goose Lake basin is home to four endemic fish taxa: the Goose Lake redband trout, lamprey, sucker, and tui chub. Endemic fishes of the Goose Lake basin split their life histories between Goose Lake and its tributaries, as opposed to the five native but non-endemic species that primarily occupy stream habitats. Pit roach and all endemic fishes except Goose Lake tui chub are listed as a “species of concern” by the USFWS, a designation that implies there is concern about species viability, but not enough information is known to initiate a listing review for threatened or endangered status. The Modoc sucker was listed as a federally endangered species in 1985 (USFWS 1985). No formal recovery plan was required due to an existing “Action Plan for the Recovery of the Modoc Sucker” (USFWS 1984). Most of the recovery actions outlined in the action plan were either completed or are no longer relevant (Stewart Reid, Western Fishes, personal communication). However, actions 26 and 27 pertaining to range expansion remain incomplete. Action 26 suggests reclassification to threatened upon establishment of safe populations (for 3-5 years) throughout the Rush and Turner Creek watersheds in the Pit River basin. Action 27 suggests delisting upon establishing safe populations in two other historic streams. At the time of listing, the historic range of Modoc sucker was thought to have included only two small tributaries of the Pit River in Modoc and Lassen Counties, Ash and Turner Creeks (USFWS 1985). Therefore, a major recovery goal was to expand the species’ range with additional populations (USFWS 1984). In 2001, reexamination of historical documents and museum specimens established that Modoc suckers had also historically occupied Thomas Creek in the Goose Lake basin. Field collections in 2001, with subsequent morphological and genetic analysis, confirmed that the population was still present in Thomas Creek (Stewart Reid, Western Fishes, personal communication); however, the broader range of Modoc sucker in the Goose Lake watershed was not known. In 1995, the Goose Lake Fishes Working Group drafted a conservation plan for “prelisting” recovery of all native fish in response to severe drought and habitat degradation (GLFWG 1995). The Aquatic Inventories Project of the Oregon Department of Fish and Wildlife (ODFW) conducted habitat and fish distribution surveys (1991-1995) to obtain baseline information to help inform recovery efforts (ODFW, unpublished data). Since then, field work to monitor the distribution and abundance of Goose Lake fishes has been limited and sporadic, targeting only Goose Lake redband trout and Modoc sucker (Dambacher 2001; Reid 2007). No comprehensive follow up work has been conducted to evaluate fish response to climatic conditions, habitat restoration projects, and continued irrigation activities. ODFW recently drafted a status review of native fish of Oregon (ODFW 2005). Except for redband trout, Goose Lake fishes were not included in the status review due to a lack of new information since the previous status review in 1995 (Kostow et al. 1995). Further, the review of Goose Lake redband trout was limited by a lack of long-term data series. The first objective of this study was to document the current distribution of native fishes in Oregon’s portion of the Goose Lake basin and assess changes in distribution that may have occurred since the last surveys were conducted 12 years ago. The second objective was to provide new information about the distribution of Modoc suckers within the basin. The third objective was to determine relative abundance and age-class diversity of native fishes at randomly selected sample sites. All objectives were addressed throughout the potential riverine distribution of fish in the Oregon portion of the Goose Lake basin. Information gathered in this study is critical to effective conservation and management of each species and its habitat. In addition, this report describes the distribution and relative abundance of nonnative fishes (fathead minnow (Pimephales promelas), brown bullhead (Ameiurus nebulosus), white crappie (Pomoxis annularis), yellow perch (Perca flavescens), pumpkinseed (Lepomis gibbosus), and brook trout (Salvelinus fontinalis)) in the basin. Unlike prior efforts, this study used a statisticallybased design to select sample points with the aim of achieving a representative sample across the Oregon portion of the Goose Lake watershed. Additionally, a wide array of fish sampling gear was employed to maximize our ability to capture all fish species present across the diversity of habitat types encountered. Close

• 84. [Article] Status, Distribution, and Life History Investigations of Warner Suckers, 2006-2010 Information Reports number 2011-02

  Abstract -- The Warner sucker Catostomus warnerensis is endemic to the Warner Valley, a subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. This species was historically abundant ...

  Citation × Citation Citation Abstract Copy Title: Status, Distribution, and Life History Investigations of Warner Suckers, 2006-2010 Information Reports number 2011-02 Abstract -- The Warner sucker Catostomus warnerensis is endemic to the Warner Valley, a subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. This species was historically abundant (Snyder 1908) and its historical range includes three permanent lakes (Hart, Crump, and Pelican), several ephemeral lakes, a network of sloughs and diversion canals, and three major tributary drainages (Honey, Deep, and Twentymile creeks). Warner sucker abundance and distribution has declined over the past century and it was federally listed as threatened in 1985 due to habitat fragmentation and threats posed by the proliferation of piscivorous non-native game fishes (U.S. Fish and Wildlife Service 1985). The Warner Valley is a northeast-southwest trending endorheic basin that extends approximately 90 km (Figure 1). The elevation of the valley floor is approximately 1,370 m and the basin is bound by fault block escarpments, the Warner Rim on the west and Hart Mountain and Poker Jim Ridge on the east. The Warner basin was formed during the middle Tertiary and late Quaternary geologic periods as a result of volcanic and tectonic activity (Baldwin 1974). Abundant precipitation during the Pleistocene Epoch resulted in the formation of Pluvial Lake Warner (Hubbs and Miller 1948). At its maximum extent approximately 11,000 years ago, the lake reached approximately 100 m in depth and 1,300 km2 in area (Snyder et al. 1964; Weide 1975). The Warner sucker inhabits the lakes and low gradient stream reaches of the Warner Valley. The metapopulation of Warner suckers is comprised of two life history forms: lake and stream morphs. The lake suckers display a lacustrine-adfluvial pattern in which they spend most of the year in the lake and spawn in the streams. However, when upstream migration is hindered by low stream flows during drought years or by irrigation diversion dams, lake suckers may spawn in nearshore areas of the lakes (White et al. 1990). Large lake-dwelling populations of introduced fishes in the lakes likely reduce sucker recruitment by predation on young suckers (U.S. Fish and Wildlife Service 1998). Periodic lake desiccation also threatens the lake suckers. The stream suckers display a fluvial life-history pattern and spawn in the three major tributary drainages (Honey, Deep, and Twentymile Creeks). Threats specific to the stream form include water withdrawals for irrigation and impacts from grazing. Stream suckers recolonized the lakes after past drying events (mid-1930’s and early-1990’s). The Recovery Plan for the Threatened and Rare Native Fishes of the Warner Basin and Alkali Subbasin (U.S. Fish and Wildlife Service 1998) sets three recovery criteria for delisting the species. These criteria require that: (1) a self-sustaining metapopulation is distributed throughout the drainages of Twentymile Creek, Honey Creek, and below the falls on Deep Creek, and in Pelican, Crump, and Hart Lakes; (2) passage is restored within and among these drainages so that individual populations of Warner suckers can function as a metapopulation; and (3) no threats exist that would likely threaten the survival of the species over a significant portion of its range. The Oregon Department of Fish and Wildlife’s (ODFW’s) Native Fish Investigations Project conducted investigations from 2006 through 2010 to describe the conservation (recovery) status of Warner suckers. The objectives of our investigations were to: 1) describe the current distribution of suckers in the Warner subbasin, 2) estimate their abundance in the lakes and streams, 3) collect life history information, and 4) describe the primary factors that currently limit the sucker’s ability to maintain a functioning metapopulation, including connectivity/fragmentation of habitats and factors affecting successful recruitment in the lake and stream environments. Previous similar studies were conducted in 1990, 1991, 1994, 1995, 1996, 1997, and 2001 (White et al. 1990; White et al. 1991; Allen et al. 1994; Allen et al. 1995; Allen et al. 1996; Bosse et al. 1997; Hartzell et al. 2001). We addressed these objectives by implementing the following tasks: 1) conducting surveys in Hart and Crump Lakes to describe the distribution and quantify the abundance of Warner suckers, search for evidence of recent recruitment, estimate sucker abundance relative to nonnative fish abundance, and describe certain life history characteristics, 2) tagging suckers with Passive Integrated Transponder (PIT) tags in the lakes and tributaries to estimate growth rates and describe seasonal movements, 3) radio tracking suckers in the lakes and tributaries to describe seasonal movements, 4) fishing screw traps in Warner basin tributaries to monitor downstream movements, 5) operating a trap at a fish ladder on a Warner tributary to assess upstream passage success, 6) conducting surveys in Warner basin tributaries to describe the current distribution of stream resident populations of Warner suckers and to quantify their abundance, 7) describing associations between the distribution of suckers and habitat variables in Twentymile Creek, 8) trapping larval suckers in the tributaries to describe the relative abundance and timing of larval movements, 9) describing life history parameters including growth rates, length frequency distributions, length at maturity, and weight-length relationships, 10) evaluating a nonlethal ageing technique, 11) describing the distribution and abundance of the Warner suckers at Summer Lake Wildlife Management area, where a self-sustaining population became established after fish salvage from Hart Lake during the 1992 drought, and 12) collecting tissue samples for future genetic analyses. This report compiles the results of this work, synthesizes and interprets findings relative to the conservation status of the species, and recommends future studies. Title: Status, Distribution, and Life History Investigations of Warner Suckers, 2006-2010 Information Reports number 2011-02 Abstract -- The Warner sucker Catostomus warnerensis is endemic to the Warner Valley, a subbasin of the Great Basin in southeastern Oregon and northwestern Nevada. This species was historically abundant (Snyder 1908) and its historical range includes three permanent lakes (Hart, Crump, and Pelican), several ephemeral lakes, a network of sloughs and diversion canals, and three major tributary drainages (Honey, Deep, and Twentymile creeks). Warner sucker abundance and distribution has declined over the past century and it was federally listed as threatened in 1985 due to habitat fragmentation and threats posed by the proliferation of piscivorous non-native game fishes (U.S. Fish and Wildlife Service 1985). The Warner Valley is a northeast-southwest trending endorheic basin that extends approximately 90 km (Figure 1). The elevation of the valley floor is approximately 1,370 m and the basin is bound by fault block escarpments, the Warner Rim on the west and Hart Mountain and Poker Jim Ridge on the east. The Warner basin was formed during the middle Tertiary and late Quaternary geologic periods as a result of volcanic and tectonic activity (Baldwin 1974). Abundant precipitation during the Pleistocene Epoch resulted in the formation of Pluvial Lake Warner (Hubbs and Miller 1948). At its maximum extent approximately 11,000 years ago, the lake reached approximately 100 m in depth and 1,300 km2 in area (Snyder et al. 1964; Weide 1975). The Warner sucker inhabits the lakes and low gradient stream reaches of the Warner Valley. The metapopulation of Warner suckers is comprised of two life history forms: lake and stream morphs. The lake suckers display a lacustrine-adfluvial pattern in which they spend most of the year in the lake and spawn in the streams. However, when upstream migration is hindered by low stream flows during drought years or by irrigation diversion dams, lake suckers may spawn in nearshore areas of the lakes (White et al. 1990). Large lake-dwelling populations of introduced fishes in the lakes likely reduce sucker recruitment by predation on young suckers (U.S. Fish and Wildlife Service 1998). Periodic lake desiccation also threatens the lake suckers. The stream suckers display a fluvial life-history pattern and spawn in the three major tributary drainages (Honey, Deep, and Twentymile Creeks). Threats specific to the stream form include water withdrawals for irrigation and impacts from grazing. Stream suckers recolonized the lakes after past drying events (mid-1930’s and early-1990’s). The Recovery Plan for the Threatened and Rare Native Fishes of the Warner Basin and Alkali Subbasin (U.S. Fish and Wildlife Service 1998) sets three recovery criteria for delisting the species. These criteria require that: (1) a self-sustaining metapopulation is distributed throughout the drainages of Twentymile Creek, Honey Creek, and below the falls on Deep Creek, and in Pelican, Crump, and Hart Lakes; (2) passage is restored within and among these drainages so that individual populations of Warner suckers can function as a metapopulation; and (3) no threats exist that would likely threaten the survival of the species over a significant portion of its range. The Oregon Department of Fish and Wildlife’s (ODFW’s) Native Fish Investigations Project conducted investigations from 2006 through 2010 to describe the conservation (recovery) status of Warner suckers. The objectives of our investigations were to: 1) describe the current distribution of suckers in the Warner subbasin, 2) estimate their abundance in the lakes and streams, 3) collect life history information, and 4) describe the primary factors that currently limit the sucker’s ability to maintain a functioning metapopulation, including connectivity/fragmentation of habitats and factors affecting successful recruitment in the lake and stream environments. Previous similar studies were conducted in 1990, 1991, 1994, 1995, 1996, 1997, and 2001 (White et al. 1990; White et al. 1991; Allen et al. 1994; Allen et al. 1995; Allen et al. 1996; Bosse et al. 1997; Hartzell et al. 2001). We addressed these objectives by implementing the following tasks: 1) conducting surveys in Hart and Crump Lakes to describe the distribution and quantify the abundance of Warner suckers, search for evidence of recent recruitment, estimate sucker abundance relative to nonnative fish abundance, and describe certain life history characteristics, 2) tagging suckers with Passive Integrated Transponder (PIT) tags in the lakes and tributaries to estimate growth rates and describe seasonal movements, 3) radio tracking suckers in the lakes and tributaries to describe seasonal movements, 4) fishing screw traps in Warner basin tributaries to monitor downstream movements, 5) operating a trap at a fish ladder on a Warner tributary to assess upstream passage success, 6) conducting surveys in Warner basin tributaries to describe the current distribution of stream resident populations of Warner suckers and to quantify their abundance, 7) describing associations between the distribution of suckers and habitat variables in Twentymile Creek, 8) trapping larval suckers in the tributaries to describe the relative abundance and timing of larval movements, 9) describing life history parameters including growth rates, length frequency distributions, length at maturity, and weight-length relationships, 10) evaluating a nonlethal ageing technique, 11) describing the distribution and abundance of the Warner suckers at Summer Lake Wildlife Management area, where a self-sustaining population became established after fish salvage from Hart Lake during the 1992 drought, and 12) collecting tissue samples for future genetic analyses. This report compiles the results of this work, synthesizes and interprets findings relative to the conservation status of the species, and recommends future studies. Close

• 85. [Article] Umatilla Basin Natural Production Monitoring and Evaluation; Annual Progress Report 1994 - 1995

  Abstract -- This report summarizes the activities of the Umatilla Basin Natural Production Monitoring and Evaluation Project (UBNPME) from September 30, 1994 to September 29, 1995. This program was funded ...

  Citation × Citation Citation Abstract Copy Title: Umatilla Basin Natural Production Monitoring and Evaluation; Annual Progress Report 1994 - 1995 Abstract -- This report summarizes the activities of the Umatilla Basin Natural Production Monitoring and Evaluation Project (UBNPME) from September 30, 1994 to September 29, 1995. This program was funded by Bonneville Power Administration and was managed under the Fisheries Program, Department of Natural Resources, Confederated Tribes of the Umatilla Indian Reservation. An estimated 36.7 km (22.6 miles) of stream habitat were inventoried on the Umatilla River, Moonshine, Mission, Cottonwood and Coonskin Creeks. A total of 384 of 3,652 (10.5%) habitat units were electrofished. The number of juvenile fish captured follows: 2,953 natural summer steelhead (including resident rainbow tout; Oncorhynchus mykiss), one hatchery steelhead, 341 natural chinook salmon (0. tshawytscha), 163 natural coho salmon (0. kisutch), five bull trout (Salvelinus confluentus), 185 mountain whitefish (Prosopium williamsoni), and six northern squawfish (Ptychocheilus oregonensis). The expanded population estimate for the areas surveyed was 73,716 salmonids with a mean density of 0.38 fish/m2. The following number of non-salmonids were visually estimated: 7,572 speckled dace (Rhinichthys osculus), 5,196 sculpin (Cottus spp.), 532 suckers (Catostomus spp.) and 191 redside shiners (Richardsonius balteatus). The gross estimated density of all non-salmonids combined was 0.84 fish/m2. The estimated ratio of non-salmonids to salmonids was 2.4: 1. Relative salmonid abundance, seasonal distribution and habitat utilization were monitored at index sites throughout the basin. During index site monitoring, the following species were collected in addition to those listed above: american shad (Alosa sapidissima), smallmouth bass (Micropterus dolomieu), carp (Cyprinus Carpio) and chiselmouth (Acrocheilus alutaceus). Thirty ­nine sites were electrofished during the spring and summer seasons, while 36 sites were sampled in the fall season. Index sites with the. highest mean salmonid catch/minute (fish/min.) during the three sample periods were located at the following sites: East Birch Creek (3.4 fish/min.), Boston Canyon Creek (3.2 fish/min.), Spring Creek (3.1 fish/min.) and upper Squaw Creek (3.0 fish/min.). The highest electrofishing catch rates were observed in the Umatilla River tributaries above river mile (RM) 70 in the August and September sample period (Table J-2 catalogs river miles with associated landmarks). During the November sample period, catch rates were highest in Birch Creek tributaries. Most salmonids were captured in slow water near the bank during the November and March sampling periods. A study of the migration movements and homing requirements of adult salmonids in the Umatilla River was conducted during the 1994-95 return years. Radio telemetry was used to evaluate the movements of adult salmonids past diversion dams in the lower Umatilla River and to determine migrational movements of salmonids following upstream transport. Radio transmitters were placed in 30 summer steelhead, 15 spring chinook, nine fall chinook, and eight coho salmon. Salmon were released at Three Mile Falls Dam (TMD). An additional 11 summer steelhead and ten spring chinook salmon were tagged, hauled upstream, and released at either Barnhart, Nolin, Thornhollow, or Imeques C-mem-ini-kem. On average, summer steelhead required 36 days to successfully migrate from TMD to Stanfield Dam. Spring chinook required 18 days. Average passage times for summer steelhead (hours and minutes) at Westland, Feed Canal, and Stanfield Dams were 13:06, 83:24, and 2:58, respectively. Spring chinook salmon required 04:30 at Westland, 89:42 at Feed Canal, and 04:01 at Stanfield Dams. Migrational delays were observed at Feed Canal Dam at flows ranging from 563 to 1,601 cubic feet/second (cfs). Thirty-eight percent of the fish ladder at Westland Dam, 75% at Feed canal, and 31% at Stanfield Dam. Average passage times at Feed Canal Dam (1995) were more than 15 times those at Stanfield Dam in 1994 and more than 20 times those at Stanfield Dam in 1995. Data related to homing and passage needs of Umatilla River salmonids was investigated in an attempt to maximize homing to the Umatilla River. Straying rates of adult summer steelhead and spring chinook salmon were found to be low while coho and fall chinook salmon stray rates were high in some groups, particularly adult returns from subyearling smolt releases of fall chinook salmon. Attraction flows of from the mouth of the Umatilla River of at least 150 cfs were required to encourage migration and reduce straying of fall chinook and coho salmon. Significant numbers of summer steelhead entered when flows exceeded 500 cfs. Spring chinook salmon entry was variable with fish entering at flows ranging from 150 to more than 2,000 cfs. Adult anadromous salmonids potentially available to spawn above TMD from August 26, 1994 to June 27, 1995 included: 593 adult and 530 jack fall chinook salmon (1994 brood), 879 adult and 54 jack coho salmon (1994 brood), 784 natural and 509 hatchery summer steelhead (1995 brood), and 378 adult and 62 jack spring chinook salmon (1995 brood). During escapement surveys (fall of 1994), a total of 82 fall chinook salmon redds, 24 coho salmon redds and seven unidentified salmon redds (112 redds total, 2.6/mile) were enumerated along 42.3 miles of the mainstem above TMD. In 1995, we enumerated and flagged 126 summer steelhead redds (3.6 redds/mile) along 35.3 miles of lateral tributaries of the Umatilla River. Also enumerated were 90 spring chinook salmon redds (1.6 redds/mile) along 55.8 miles of the mainstem. Ninety-six percent of the adult fall chinook salmon carcasses examined had spawned while 94% of the coho had spawned; 66.8 % of the spring chinook salmon carcasses examined bad spawned. A total of 49.3% of spring chinook salmon released above TMD were sampled during spawning ground surveys and 60 coded wire tags (CWTs) were recovered from 78 adipose clipped fish. The rotary screw trap in the Umatilla River (RM 76) operated 63 of 113 days from September 21, 1994 to January 13, 1995. The trap captured 596 juvenile steelhead with a mean trap efficiency rate of 9.9%. A total of 1,368 juvenile chinook salmon were captured with a mean trap efficiency rate of 28. 8 % . The rotary screw trap at the Imeques C-mem-ini-kem site (RM 79.5) operated 43 out of 43 days from May 5 through June 16, 1995. The trap captured 304 natural juvenile steelhead with a mean trap efficiency rate of 6.6%. A total of 102 natural juvenile chinook salmon were captured with a mean trap efficiency rate of 10.5%. The rotary screw trap at the Barnhart site (RM 42,2) operated 87 out of 125 days from March 3 to June I, 1995. The trap captured 105 natural juvenile steelhead, 247 natural juvenile chinook salmon, five natural coho salmon, 6,265 hatchery juvenile chinook salmon, 467 hatchery steelhead and 16,844 hatchery coho salmon. Mean trap efficiency rates ranged from 2.3 to 5.7% . Harvest monitors estimated that tribal anglers harvested 25 hatchery and five natural summer steelhead during the spring of 1995. There was no spring chinook salmon fishery in the Umatilla River during 1995 because of the low number of returning adults. Scale analysis determined that over 85 .0% of naturally produced juvenile summer steelhead sampled during biological and index surveys were age O+ or l +. Naturally produced summer steelhead adults, returning to the Umatilla River in 1994-95, were mostly from the 1990 (46.4%) and 1991 (33.9%) brood years. Title: Umatilla Basin Natural Production Monitoring and Evaluation; Annual Progress Report 1994 - 1995 Abstract -- This report summarizes the activities of the Umatilla Basin Natural Production Monitoring and Evaluation Project (UBNPME) from September 30, 1994 to September 29, 1995. This program was funded by Bonneville Power Administration and was managed under the Fisheries Program, Department of Natural Resources, Confederated Tribes of the Umatilla Indian Reservation. An estimated 36.7 km (22.6 miles) of stream habitat were inventoried on the Umatilla River, Moonshine, Mission, Cottonwood and Coonskin Creeks. A total of 384 of 3,652 (10.5%) habitat units were electrofished. The number of juvenile fish captured follows: 2,953 natural summer steelhead (including resident rainbow tout; Oncorhynchus mykiss), one hatchery steelhead, 341 natural chinook salmon (0. tshawytscha), 163 natural coho salmon (0. kisutch), five bull trout (Salvelinus confluentus), 185 mountain whitefish (Prosopium williamsoni), and six northern squawfish (Ptychocheilus oregonensis). The expanded population estimate for the areas surveyed was 73,716 salmonids with a mean density of 0.38 fish/m2. The following number of non-salmonids were visually estimated: 7,572 speckled dace (Rhinichthys osculus), 5,196 sculpin (Cottus spp.), 532 suckers (Catostomus spp.) and 191 redside shiners (Richardsonius balteatus). The gross estimated density of all non-salmonids combined was 0.84 fish/m2. The estimated ratio of non-salmonids to salmonids was 2.4: 1. Relative salmonid abundance, seasonal distribution and habitat utilization were monitored at index sites throughout the basin. During index site monitoring, the following species were collected in addition to those listed above: american shad (Alosa sapidissima), smallmouth bass (Micropterus dolomieu), carp (Cyprinus Carpio) and chiselmouth (Acrocheilus alutaceus). Thirty ­nine sites were electrofished during the spring and summer seasons, while 36 sites were sampled in the fall season. Index sites with the. highest mean salmonid catch/minute (fish/min.) during the three sample periods were located at the following sites: East Birch Creek (3.4 fish/min.), Boston Canyon Creek (3.2 fish/min.), Spring Creek (3.1 fish/min.) and upper Squaw Creek (3.0 fish/min.). The highest electrofishing catch rates were observed in the Umatilla River tributaries above river mile (RM) 70 in the August and September sample period (Table J-2 catalogs river miles with associated landmarks). During the November sample period, catch rates were highest in Birch Creek tributaries. Most salmonids were captured in slow water near the bank during the November and March sampling periods. A study of the migration movements and homing requirements of adult salmonids in the Umatilla River was conducted during the 1994-95 return years. Radio telemetry was used to evaluate the movements of adult salmonids past diversion dams in the lower Umatilla River and to determine migrational movements of salmonids following upstream transport. Radio transmitters were placed in 30 summer steelhead, 15 spring chinook, nine fall chinook, and eight coho salmon. Salmon were released at Three Mile Falls Dam (TMD). An additional 11 summer steelhead and ten spring chinook salmon were tagged, hauled upstream, and released at either Barnhart, Nolin, Thornhollow, or Imeques C-mem-ini-kem. On average, summer steelhead required 36 days to successfully migrate from TMD to Stanfield Dam. Spring chinook required 18 days. Average passage times for summer steelhead (hours and minutes) at Westland, Feed Canal, and Stanfield Dams were 13:06, 83:24, and 2:58, respectively. Spring chinook salmon required 04:30 at Westland, 89:42 at Feed Canal, and 04:01 at Stanfield Dams. Migrational delays were observed at Feed Canal Dam at flows ranging from 563 to 1,601 cubic feet/second (cfs). Thirty-eight percent of the fish ladder at Westland Dam, 75% at Feed canal, and 31% at Stanfield Dam. Average passage times at Feed Canal Dam (1995) were more than 15 times those at Stanfield Dam in 1994 and more than 20 times those at Stanfield Dam in 1995. Data related to homing and passage needs of Umatilla River salmonids was investigated in an attempt to maximize homing to the Umatilla River. Straying rates of adult summer steelhead and spring chinook salmon were found to be low while coho and fall chinook salmon stray rates were high in some groups, particularly adult returns from subyearling smolt releases of fall chinook salmon. Attraction flows of from the mouth of the Umatilla River of at least 150 cfs were required to encourage migration and reduce straying of fall chinook and coho salmon. Significant numbers of summer steelhead entered when flows exceeded 500 cfs. Spring chinook salmon entry was variable with fish entering at flows ranging from 150 to more than 2,000 cfs. Adult anadromous salmonids potentially available to spawn above TMD from August 26, 1994 to June 27, 1995 included: 593 adult and 530 jack fall chinook salmon (1994 brood), 879 adult and 54 jack coho salmon (1994 brood), 784 natural and 509 hatchery summer steelhead (1995 brood), and 378 adult and 62 jack spring chinook salmon (1995 brood). During escapement surveys (fall of 1994), a total of 82 fall chinook salmon redds, 24 coho salmon redds and seven unidentified salmon redds (112 redds total, 2.6/mile) were enumerated along 42.3 miles of the mainstem above TMD. In 1995, we enumerated and flagged 126 summer steelhead redds (3.6 redds/mile) along 35.3 miles of lateral tributaries of the Umatilla River. Also enumerated were 90 spring chinook salmon redds (1.6 redds/mile) along 55.8 miles of the mainstem. Ninety-six percent of the adult fall chinook salmon carcasses examined had spawned while 94% of the coho had spawned; 66.8 % of the spring chinook salmon carcasses examined bad spawned. A total of 49.3% of spring chinook salmon released above TMD were sampled during spawning ground surveys and 60 coded wire tags (CWTs) were recovered from 78 adipose clipped fish. The rotary screw trap in the Umatilla River (RM 76) operated 63 of 113 days from September 21, 1994 to January 13, 1995. The trap captured 596 juvenile steelhead with a mean trap efficiency rate of 9.9%. A total of 1,368 juvenile chinook salmon were captured with a mean trap efficiency rate of 28. 8 % . The rotary screw trap at the Imeques C-mem-ini-kem site (RM 79.5) operated 43 out of 43 days from May 5 through June 16, 1995. The trap captured 304 natural juvenile steelhead with a mean trap efficiency rate of 6.6%. A total of 102 natural juvenile chinook salmon were captured with a mean trap efficiency rate of 10.5%. The rotary screw trap at the Barnhart site (RM 42,2) operated 87 out of 125 days from March 3 to June I, 1995. The trap captured 105 natural juvenile steelhead, 247 natural juvenile chinook salmon, five natural coho salmon, 6,265 hatchery juvenile chinook salmon, 467 hatchery steelhead and 16,844 hatchery coho salmon. Mean trap efficiency rates ranged from 2.3 to 5.7% . Harvest monitors estimated that tribal anglers harvested 25 hatchery and five natural summer steelhead during the spring of 1995. There was no spring chinook salmon fishery in the Umatilla River during 1995 because of the low number of returning adults. Scale analysis determined that over 85 .0% of naturally produced juvenile summer steelhead sampled during biological and index surveys were age O+ or l +. Naturally produced summer steelhead adults, returning to the Umatilla River in 1994-95, were mostly from the 1990 (46.4%) and 1991 (33.9%) brood years. Close