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• 3601. [Article] A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001

  Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of ...

  Citation × Citation Citation Abstract Copy Title: A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001 Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of the North Umpqua steelhead population and its' habitat is a very high priority. The Oregon Department of Fish and Wildlife (ODFW) develops, on a continuing basis, practices designed to ensure the health and viability of this population. However, continued management success depends critically on the availability of data necessary for a detailed understanding of relevant life history issues. To address these data needs, ODFW began a radio-telemetry study of North Umpqua steelhead in June of 1998. Tagging at Winchester dam was terminated 10/26/00 but monitoring continued until the end of May 2001. This study has provided detailed information on movement patterns of adult steelhead in the basin at a level that is available in no other way and is the most comprehensive project of its type for the Umpqua Basin. A radio tagging study whose scope was limited to the Steamboat Creek subbasin was carried out previously (Wroble, 1990). Also, a previous study of temperature trends in that subbasin is of interest (Hostetler, 1991). Although similar radio telemetry studies ( e.g. Hockersmith et al, 1995) have been carried out in other basins, they are few. Title: A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001 Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of the North Umpqua steelhead population and its' habitat is a very high priority. The Oregon Department of Fish and Wildlife (ODFW) develops, on a continuing basis, practices designed to ensure the health and viability of this population. However, continued management success depends critically on the availability of data necessary for a detailed understanding of relevant life history issues. To address these data needs, ODFW began a radio-telemetry study of North Umpqua steelhead in June of 1998. Tagging at Winchester dam was terminated 10/26/00 but monitoring continued until the end of May 2001. This study has provided detailed information on movement patterns of adult steelhead in the basin at a level that is available in no other way and is the most comprehensive project of its type for the Umpqua Basin. A radio tagging study whose scope was limited to the Steamboat Creek subbasin was carried out previously (Wroble, 1990). Also, a previous study of temperature trends in that subbasin is of interest (Hostetler, 1991). Although similar radio telemetry studies ( e.g. Hockersmith et al, 1995) have been carried out in other basins, they are few. Close

• 3602. [Article] Wallowa River Habitat Protection and Restoration Strategies

  Abstract -- None

  Citation × Citation Citation Abstract Copy Title: Wallowa River Habitat Protection and Restoration Strategies Abstract -- None Title: Wallowa River Habitat Protection and Restoration Strategies Abstract -- None Close

• 3603. [Article] Progress Reports 2017, Distribution and Abundance of Pit Sculpin in Drews and Camp Creeks, Oregon

  Abstract -- Pit Sculpin Cottus pitensis are endemic to Goose Lake basin, south-central Oregon. The species was listed as sensitive by the U.S. Forest Service Region 6 and Bureau of Land Management and ...

  Citation × Citation Citation Abstract Copy Title: Progress Reports 2017, Distribution and Abundance of Pit Sculpin in Drews and Camp Creeks, Oregon Abstract -- Pit Sculpin Cottus pitensis are endemic to Goose Lake basin, south-central Oregon. The species was listed as sensitive by the U.S. Forest Service Region 6 and Bureau of Land Management and by the State of Oregon. Recent surveys suggested Pit Sculpin have a restricted range in Oregon. The objectives of our surveys were to: 1) describe the current distribution and estimate the abundance of Pit Sculpin in Drews and Camp creeks, 2) describe the fish assemblages in Drews and Camp creeks, and 3) describe stream habitat conditions and collect habitat covariate data at each sampling location for modelling capture probabilities and abundance. We found Pit Sculpin distribution was limited to approximately 5.2 km of Drews Creek and 0.8 km of Camp Creek. Pit Sculpin primarily occupied riffles with gravel substrate. We estimated 12,331 and 1,518 Pit Sculpin in Drews and Camp creeks, respectively. Title: Progress Reports 2017, Distribution and Abundance of Pit Sculpin in Drews and Camp Creeks, Oregon Abstract -- Pit Sculpin Cottus pitensis are endemic to Goose Lake basin, south-central Oregon. The species was listed as sensitive by the U.S. Forest Service Region 6 and Bureau of Land Management and by the State of Oregon. Recent surveys suggested Pit Sculpin have a restricted range in Oregon. The objectives of our surveys were to: 1) describe the current distribution and estimate the abundance of Pit Sculpin in Drews and Camp creeks, 2) describe the fish assemblages in Drews and Camp creeks, and 3) describe stream habitat conditions and collect habitat covariate data at each sampling location for modelling capture probabilities and abundance. We found Pit Sculpin distribution was limited to approximately 5.2 km of Drews Creek and 0.8 km of Camp Creek. Pit Sculpin primarily occupied riffles with gravel substrate. We estimated 12,331 and 1,518 Pit Sculpin in Drews and Camp creeks, respectively. Close

• 3604. [Article] 2015 Calapooia River Rapid Bio-Assessments Inventory

  Abstract -- The 2015 Rapid Bio-Assessment inventory of the Calapooia basin covered 37.2 miles of stream habitat. The effort encompassed all of the mainstem and tributary habitats, upstream of the Holley ...

  Citation × Citation Citation Abstract Copy Title: 2015 Calapooia River Rapid Bio-Assessments Inventory Abstract -- The 2015 Rapid Bio-Assessment inventory of the Calapooia basin covered 37.2 miles of stream habitat. The effort encompassed all of the mainstem and tributary habitats, upstream of the Holley Bridge (USGS RM 45.5). Tributary inventories extended to the end of significant rearing potential for anadromous salmonids. In addition, a spring chinook resting count inventory encompassing the same mainstem reach and an additional 9.5 miles downstream to the deconstructed Brownsville Dam site (USGS RM36) was conducted in an attempt to quantify the abundance of adult Spring Chinook returning to the basin to spawn. An inventory of spawning gravel abundance was also conducted in the 30 miles of mainstem and tributary stream habitats exhibiting any anadromous potential (only spawning gravel sites appropriate for steelhead were quantified). Title: 2015 Calapooia River Rapid Bio-Assessments Inventory Abstract -- The 2015 Rapid Bio-Assessment inventory of the Calapooia basin covered 37.2 miles of stream habitat. The effort encompassed all of the mainstem and tributary habitats, upstream of the Holley Bridge (USGS RM 45.5). Tributary inventories extended to the end of significant rearing potential for anadromous salmonids. In addition, a spring chinook resting count inventory encompassing the same mainstem reach and an additional 9.5 miles downstream to the deconstructed Brownsville Dam site (USGS RM36) was conducted in an attempt to quantify the abundance of adult Spring Chinook returning to the basin to spawn. An inventory of spawning gravel abundance was also conducted in the 30 miles of mainstem and tributary stream habitats exhibiting any anadromous potential (only spawning gravel sites appropriate for steelhead were quantified). Close

• 3605. [Article] Habitat use and activity patterns of Deacon Rockfish (Sebastes diaconus) at seasonal scales and in response to episodic hypoxia.

  Abstract -- Knowledge of fish movements and residency are key to design and interpretation of results from bioacoustic sonar and visual survey methods, which are being developed as tools for use in nearshore ...

  Citation × Citation Citation Abstract Copy Title: Habitat use and activity patterns of Deacon Rockfish (Sebastes diaconus) at seasonal scales and in response to episodic hypoxia. Abstract -- Knowledge of fish movements and residency are key to design and interpretation of results from bioacoustic sonar and visual survey methods, which are being developed as tools for use in nearshore rocky reef surveys to estimate biomass and species composition. Fishers in Oregon report that an important component of the nearshore catch, Deacon Rockfish (Sebastes diaconus), become unavailable to harvest seasonally, and suggest periodic migration away from nearshore reef areas. Seasonal and spatial variation in landings data potentially support this theory. We used a high-resolution acoustic telemetry array and a combination of presence/absence receiver arrays, to study the daily and seasonal movements and the activity patterns of 11 acoustically tagged Deacon Rockfish on a nearshore rocky reef off Seal Rock, Oregon. Over the 11-month study period, most fish (n=6) exhibited high site fidelity. For the duration of the high-resolution array (5 mo), these fish had small home ranges (mean 95% KDE=4907 m2) and consistent activity patterns, except during seasonal hypoxia (defined as dissolved oxygen concentration [DO] < 2 mg l-1). During the summer months, resident fish were strongly diurnal with high levels of daytime activity above the bottom in relatively rugose habitat, followed by nighttime rest periods in deeper water in habitat of relatively less rugosity. During hypoxia, fish exhibited moderate activity levels with no rest periods and moved well away from their core activity areas on long, erratic forays. Wintertime activity levels were moderate with less defined daily patterns, but fish continued to remain within the array area. We suggest that Deacon Rockfish remain on nearshore reefs throughout the year, but their visual capabilities and prey preferences for seasonally occurring planktonic organisms strongly influences their catchability. Habitat use and activity patterns exhibited by Deacon Rockfish are conducive to bioacoustic sonar and visual survey methods if season, daylight, and oxygen levels are considered. Title: Habitat use and activity patterns of Deacon Rockfish (Sebastes diaconus) at seasonal scales and in response to episodic hypoxia. Abstract -- Knowledge of fish movements and residency are key to design and interpretation of results from bioacoustic sonar and visual survey methods, which are being developed as tools for use in nearshore rocky reef surveys to estimate biomass and species composition. Fishers in Oregon report that an important component of the nearshore catch, Deacon Rockfish (Sebastes diaconus), become unavailable to harvest seasonally, and suggest periodic migration away from nearshore reef areas. Seasonal and spatial variation in landings data potentially support this theory. We used a high-resolution acoustic telemetry array and a combination of presence/absence receiver arrays, to study the daily and seasonal movements and the activity patterns of 11 acoustically tagged Deacon Rockfish on a nearshore rocky reef off Seal Rock, Oregon. Over the 11-month study period, most fish (n=6) exhibited high site fidelity. For the duration of the high-resolution array (5 mo), these fish had small home ranges (mean 95% KDE=4907 m2) and consistent activity patterns, except during seasonal hypoxia (defined as dissolved oxygen concentration [DO] < 2 mg l-1). During the summer months, resident fish were strongly diurnal with high levels of daytime activity above the bottom in relatively rugose habitat, followed by nighttime rest periods in deeper water in habitat of relatively less rugosity. During hypoxia, fish exhibited moderate activity levels with no rest periods and moved well away from their core activity areas on long, erratic forays. Wintertime activity levels were moderate with less defined daily patterns, but fish continued to remain within the array area. We suggest that Deacon Rockfish remain on nearshore reefs throughout the year, but their visual capabilities and prey preferences for seasonally occurring planktonic organisms strongly influences their catchability. Habitat use and activity patterns exhibited by Deacon Rockfish are conducive to bioacoustic sonar and visual survey methods if season, daylight, and oxygen levels are considered. Close