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Adult Chinook And Sockeye Salmon, And Steelhead Fallback Rates At Bonneville Dam, - 1996-1998 Item Info
- Title:
- Adult Chinook And Sockeye Salmon, And Steelhead Fallback Rates At Bonneville Dam, - 1996-1998
- Report Type:
- Technical Report
- Date:
- 2000
- Authors:
- Bjornn, T.C.; Keefer, M.L.; Peery, C.A.; Tolotti, K.R.; Ringe, R.R.; Stuehrenberg, L.C.
- Affiliations:
- Idaho Cooperative Fish and Wildlife Research Unit; National Marine Fisheries Service, National Oceanic and Atmospheric Administration
- Report Number:
- 2000-1
- Publisher:
- University of Idaho
- Funder:
- U.S. Army Corps of Engineers, Portland District; U.S. Army Corps of Engineers, Walla Walla District; Bonneville Power Administration
- Abstract:
- Starting in 1996, we outfitted large numbers of adult spring and summer Chinook salmon Onchorhynchus tshawytscha, sockeye salmon O. nerka, and steelhead O. mykiss with radio transmitters at Bonneville Dam to monitor their passage at the dam s in the Columbia and Snake rivers and survival to natal streams. In this report, we present information on the percentage of salmon and steelhead that fell back at Bonneville Dam, fallback rates (includes multiple fallbacks by individual fish), relations to environmental variables, survival of fish that fell back, and bias in escapement estimates based on counts of fish at the dams. I n the three years 1996, 1997, and 1998 we outfitted 2,825 spring and summer Chinook salmon with transmitters, 577 sockeye salmon in 1997, 1,745 steelhead with transmitters in 1996 and 1997, and 1,032 fall Chinook salmon in 1998. Of these, 3,605 Chinook salmon, 562 sockeye salmon, and 1,640 steelhead passed the dam after they were released 10 km downstream from the dam. We monitored passage and fallbacks at the dam using antennas and receivers in the tailrace, fishways, and forebay in all years, and supplemented that data with recapture records, teleme try records from receivers at upriver dams and the mouths of tributaries, and locations of fish found by tracking with antennas on truck or boats.
- Species:
- Steelhead, Oncorhynchus mykiss Chinook salmon, Oncorhynchus tshawytscha sockeye salmon, Oncorhynchus nerka
- Location:
- Bonneville Dam; Columbia River; Snake River
- Subjects:
- salmonids Federal Columbia River Power System FCPRS radiotelemetry migration fishways passage behavior fallback rates
- Source:
- University of Idaho, Fish Ecology Research Lab
- Original Filename:
- 2000-01-Bonneville-Fallback-1996-1998.pdf
- Format:
- application/pdf
Source
- Preferred Citation:
- "Adult Chinook And Sockeye Salmon, And Steelhead Fallback Rates At Bonneville Dam, - 1996-1998", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-2000-1.html
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