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Passage behavior and survival of radio-tagged yearling chinook salmon and juvenile steelhead at Ice Harbor Dam, 2009
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2010
[PDF-24.90 MB]
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Description:In 2009, we evaluated passage behavior, distribution, and survival of yearling Chinook salmon, steelhead, and subyearling Chinook salmon at Ice Harbor Dam. A central objective of these evaluations was to evaluate the effects of a removable spillway weir (RSW) used during two different spill operations. Study fish consisted of those collected and surgically tagged with both a radio transmitter and PIT tag for similar evaluations at Lower Monumental Dam. For the Ice Harbor evaluation, treatment groups consisted of fish released either 7 km above Lower Monumental Dam or into the tailrace of Lower Monumental Dam. These fish were regrouped by day of detection on the Ice Harbor forebay entry line, 600 m upstream from the dam. A total of 1,887 radio-tagged yearling Chinook salmon, 1,952 juvenile steelhead, and 2,592 subyearling Chinook salmon from these releases were utilized as treatment fish from the upstream releases for survival estimates based on the single-release model.
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Rights Information:CC0 Public Domain
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