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Research related to transportation of juvenile salmonids on the Columbia River, 2005: final report for the 2003 hatchery steelhead juvenile migration
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2007
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[PDF-8.62 MB]
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Description:Since 1999, the National Marine Fisheries Service has conducted annual studies to evaluate transportation of Snake River steelhead smolts. In 2003, we began annual studies to evaluate transportation of upper Columbia River hatchery steelhead smolts. Here we report complete adult recovery data from Columbia River hatchery steelhead smolts marked with passive integrated transponder (PIT) tags and released in 2003. From June 2005 through May 2006, we recovered age-2-ocean steelhead adults, completing adult returns from the 2003 study year. As smolts, these fish were tagged and released from Wells (246,056), Winthrop (49,241), Chelan (33,147), Eastbank (61,981), and Ringold (95,161) Hatcheries. At McNary Dam, PIT-tagged smolts that entered the juvenile bypass system were collected, and on alternate days, either diverted to transportation holding raceways or returned to the river through the full-flow bypass system. Transported fish were released below Bonneville Dam, while bypassed fish completed theirjuvenile migration in the river, along with study fish that did not enter the juvenile collection system at McNary Dam (inriver migrants).
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Rights Information:CC0 Public Domain
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