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Long‐distance downstream movements by homing adult chinook salmon

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Unusually long downstream movements totalling several hundred kilometres to >1100 km were observed during upstream homing migrations of radio‐tagged spring chinook salmon Oncorhynchus tshawytscha in the Columbia and Snake Rivers, U.S.A. Downstream migrants, identified by their repeated ascension and fallback over a series of large hydroelectric dams within the migration corridor, were primarily hatchery‐origin males.

Keywords: Oncorhynchus; chinook salmon; downstream migration; hatchery; radiotelemetry

Document Type: Research Article


Affiliations: Fish Ecology Research Laboratory, Department of Fish and Wildlife Resources, College of Natural Resources, University of Idaho, Moscow, Idaho 83844-1136, U.S.A.

Publication date: March 1, 2006

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