Search

Search Results

• 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