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Spillway survival for radio-tagged yearling Chinook salmon at Lower Monumental Dam, 2005
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2006
[PDF-16.80 MB]
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Description:In 2005, we estimated relative spillway passage survival for radio-tagged, river-run, hatchery yearling Chinook salmon released into spillbays 7 and 8 at Lower Monumental Dam on the Snake River. Fish were collected from the smolt-monitoring sample at either Lower Monumental or Little Goose Dams and were surgically tagged with a radio transmitter and PIT tagged. The treatment group comprised 901 and 889 fish released into spillbays 7 and 8, respectively. The reference group comprised 1,279 fish released into the tailrace of Lower Monumental Dam. Fish were released over 23 d, from 3 to 27 May, and during daytime hours between 1030 and 1330 PDT. This collection period encompassed the 41st through 97th percentiles of yearling Chinook based on the cumulative smolt passage index at Lower Monumental Dam.
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Rights Information:CC0 Public Domain
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