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An Evaluation Of Adult Chinook Salmon Behavior In The Presence Of Pinniped Exclusion Gates, Hazing, And Acoustic Deterrents At Bonneville Dam: 2005-2006 Item Info
- Title:
- An Evaluation Of Adult Chinook Salmon Behavior In The Presence Of Pinniped Exclusion Gates, Hazing, And Acoustic Deterrents At Bonneville Dam: 2005-2006
- Report Type:
- Technical Report
- Date:
- 2007
- Authors:
- Jepson, M.A.; Keefer, M.L.; Tolotti, K.R.; Peery, C.A.; Burke, B.J.
- 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:
- 2007-4 Draft
- Publisher:
- University of Idaho
- Funder:
- U.S. Army Corps of Engineers, Portland District
- Abstract:
- We used radiotelemetry to evaluate the behavior of adult summer Chinook salmon in the presence of sea lion exclusion devices (SLEDs) intermittently deployed at four fishway openings at Powerhouse 2 of Bonneville Dam during 2005. Radio-tagged salmon that first approached at a SLED had the highest median time from first approach to first entry (1.3 h) among groupings (i.e., spillway, Powerhouse 1, and Powerhouse 2 w/ no SLED), suggesting the SLEDs mildly impeded fishway entry for some tagged salmon. However, we found no significant difference in the spatial distribution of first approaches or first entrances of radio-tagged salmon in the presence or absence of SLEDs during 2005. Based on time-to-event analyses and Cox Proportional Modeling, tagged salmon were 21% more likely to first approach Powerhouse 2 entrances at any given time when the SLEDs were deployed than when they were not. In contrast, tagged salmon were 19% less likely to first enter a Powerhouse 2 fishway at any given time when the SLEDs were deployed than when they were not. Neither difference was statistically significant.
- Species:
- Chinook salmon, Oncorhynchus tshawytscha
- Location:
- Bonneville Dam; Columbia River
- Subjects:
- salmonids pinnipeds Federal Columbia River Power System FCPRS radiotelemetry sea lion exclusion devices SLEDs migration passage behavior
- Source:
- University of Idaho, Fish Ecology Research Lab
- Original Filename:
- 2007-04-CK-passage-behavior-presence-of-pinniped-exclusion-gates-Bonneville-2005-2006.pdf
- Format:
- application/pdf
Source
- Preferred Citation:
- "An Evaluation Of Adult Chinook Salmon Behavior In The Presence Of Pinniped Exclusion Gates, Hazing, And Acoustic Deterrents At Bonneville Dam: 2005-2006", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-2007-4_draft.html
Rights
- 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.
- Standardized Rights:
- http://rightsstatements.org/vocab/InC-EDU/1.0/