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Overwintering Distribution And Fallback Behavior By Adult Radio-Tagged Steelhead In The Federal Columbia River Power System, Migration Years 2013-2014 And 2014-2015 Item Info
- Title:
- Overwintering Distribution And Fallback Behavior By Adult Radio-Tagged Steelhead In The Federal Columbia River Power System, Migration Years 2013-2014 And 2014-2015
- Report Type:
- Technical Report
- Date:
- 2015
- Authors:
- Keefer, M.L.; Clabough, T.S.; Jepson, M.A.; Caudill, C.C.; Burke, B.J.; Frick, K.E.
- Affiliations:
- Fish and Wildlife Sciences, University of Idaho; Fish Ecology Division, Northwest Fisheries Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration
- Report Number:
- 2015-15
- Publisher:
- University of Idaho
- Funder:
- U.S. Army Corps of Engineers, Portland District
- Abstract:
- Our primary objectives in this two-year study were to: 1) estimate the percentages of adult summer steelhead (Oncorhynchus mykiss) that overwintered in the Federal Columbia River Power System (FCRPS); 2) summarize the spatial distribution of FCRPS-overwintering fish; 3) evaluate the timing, location, and routes of wintertime fallback events at FCRPS dams; 4) estimate overwintering steelhead survival to tributaries; and 5) summarize the downstream movements and FCRPS survival of post-spawn steelhead kelts. We collected and radio-tagged 789 (2013) and 799 (2014) adult steelhead at Bonneville Dam and used radiotelemetry and PIT tags to monitor their behaviors and distribution. Each annual sample was split into two study groups: an early-run group that was collected from June through August, and a late-run group that was collected in September and October. The samples were weighted for late-run fish because they were more likely to overwinter in the FCRPS and because the late-run, ‘B-group’ steelhead are a management and conservation priority. A substantial portion of the run in late summer could not be sampled due to high temperatures in both years. Tissue samples were collected for all steelhead, and parentage-based tagging (PBT) and genetic stock identification (GSI) was used to help assign fish to tributary populations.
- Species:
- Steelhead, Oncorhynchus mykiss
- Location:
- Bonneville Dam; Columbia River; Snake River; McNary Dam; John Day Dam; The Dalles Dam
- Subjects:
- salmonids Federal Columbia River Power System FCPRS overwintering migration PIT tags telemetry parentage-based tagging genetic stock identification
- Source:
- University of Idaho, Fish Ecology Research Lab
- Original Filename:
- 2015-15-SH-overwintering-distribution-fallback-behavior-2013-2014-and 2014-2015.pdf
- Format:
- application/pdf
Source
- Preferred Citation:
- "Overwintering Distribution And Fallback Behavior By Adult Radio-Tagged Steelhead In The Federal Columbia River Power System, Migration Years 2013-2014 And 2014-2015", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-2015-15.html
Rights
- Rights:
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