| Item title: | Adult Chinook Salmon And Steelhead Dam Passage Behavior In Response To Manipulated Discharge Through Spillways At Bonneville Dam |
|---|---|
| Report type: | Technical Report |
| Date: | 2006 |
| Authors: | Caudill, C.C.; Peery, C.A.; Daigle, W.R.; Jepson, M.A.; Boggs, C.T.; Bjornn, T.C.; Joosten, D.; Burke, B.J.; Moser, M.L. |
| Affiliations: | Fish and Wildlife Sciences, University of Idaho; Northwest Fisheries Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration |
| Report number: | 2006-5 |
| Publisher: | University of Idaho |
| Funder: | U.S. Army Corps of Engineers, Portland District |
| Abstract: | The river conditions encountered at dams in the Columbia-Snake River Basin by returning adult salmonids are strongly affected by discharge over dam spillways (spill) during spring run-off. In recent years, dam operators have altered hydrosystem operations to continue spilling through the summer in an effort to improve survival of downstream migrating smolts. However, this action may slow the migration of adults through a number of mechanisms. During 2000, 2002, and 2003, spill levels at Bonneville Dam were alternated between low (~75 kcfs) and high (85-160 kcfs) spill volume conditions to determine the effects of spill on adult upstream migration behavior. We monitored daily dam counts and the migration of radio-tagged adult spring, summer, and fall Chinook salmon and steelhead as they passed the dam during these two treatments. |
| Species: | Steelhead, Oncorhynchus mykiss; Chinook salmon, Oncorhynchus tshawytscha |
| Concepts: | salmonids; Federal Columbia River Power System; FCPRS; radiotelemetry; migration; passage behavior; spillways; dam spill manipulation |
| Location: | Columbia River; Snake River; Bonneville Dam |
| Source: | University of Idaho, Fish Ecology Research Lab |
| Type: | Text |
| Format: | application/pdf |
| Rights: | These files are provided for research purposes with copyright held by the original authors. Please contact the publishing organization for more information about rights. |
| Digital identifier: | ferl-tr-2006-5 |
Adult Salmon and Steelhead Migration Studies: 1996-2014
A collection of scientific reports and datasets from University of Idaho's Fish Ecology Research Lab
