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Fishway Entrance Use And Passage Times Of Adult Spring–Summer Chinook Salmon At Lower Monumental Dam, With An Emphasis On Effects Of Spillway Deflectors: 2000-2004 Item Info

Title:
Fishway Entrance Use And Passage Times Of Adult Spring–Summer Chinook Salmon At Lower Monumental Dam, With An Emphasis On Effects Of Spillway Deflectors: 2000-2004
Report Type:
Technical Report
Date:
2006
Authors:
Keefer, M.L.; Peery, C.A.; Tolotti, K.R.; Jepson, M.A.; Burke, B.J.
Affiliations:
Fish and Wildlife Sciences, University of Idaho; National Marine Fisheries Service, National Oceanic and Atmospheric Administration
Report Number:
2006-10 Draft
Publisher:
University of Idaho
Funder:
U.S. Army Corps of Engineers, Walla Walla District; Bonneville Power Administration
Abstract:
We monitored the passage behaviors of 1,679 radio-tagged adult spring–summer Chinook salmon at Lower Monumental Dam from 2000-2004. Over the five years, 99.7% of the monitored fish successfully passed the dam. Under most conditions, the majority of tagged fish passed via the north-shore ladder. Passage times at the dam (annual medians) ranged from 1.4 to 2.2 h from time of tailrace entry to first approach a fishway, from 1.5 to 3.5 h from first approach to first fishway entry, and from 9.2 to 13.3 h to pass the dam. Ladder ascension times were rapid, with relatively little variability among years (medians 3.5-3.7 h). In all passage environments, salmon slowed upstream migration at night. Full-dam passage times were only weakly correlated with environmental conditions, including flow, spill, and water temperature. In general, passage times were longer during higher flow and spill and when water temperatures were either relatively high (> 17º C) or low (< 10º C). Full-dam passage times were more strongly correlated with fishway use behaviors: times were longer when fish approached fishway entrances multiple times and when fish entered and exited the fishway more than once. Numbers of approaches and entries were correlated, indicating these measures were inter-related. Times also varied somewhat with where fish first approached and entered fishways, possibly reflecting differences in fishway entrance configurations and/or the ease of use.
Species:
Chinook salmon, Oncorhynchus tshawytscha
Location:
Lower Monumental Dam; Columbia River
Subjects:
salmonids Federal Columbia River Power System FCPRS radiotelemetry migration passage behavior fishways
Source:
University of Idaho, Fish Ecology Research Lab
Original Filename:
2006-10-CK-entrance-passage-spillway-deflectors-Lower-Monumental-2000-2004.pdf
Format:
application/pdf

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Preferred Citation:
"Fishway Entrance Use And Passage Times Of Adult Spring–Summer Chinook Salmon At Lower Monumental Dam, With An Emphasis On Effects Of Spillway Deflectors: 2000-2004", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-2006-10_draft.html
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