Cannulated, seawater‐acclimated coho salmon Oncorhynchus kisutch were swum to exhaustion in a seawater tunnel (10° C, mean Ucrit 50 cm s−1), resulting in metabolic acidosis and increased plasma electrolyte and cortisol concentrations, which were corrected during a 4 h recovery. Because the swimming and physiological performance data were similar to those of other salmonids, it was concluded that life‐history limitations, besides their exercise capabilities in upwelling zones, probably explain declining coho salmon populations.
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Document Type: Regular Paper
Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, Davis, California, 95616, U.S.A. and
Department of Zoology, 6270 University Boulevard, University of British Columbia, Vancouver, B.C., V6T 2A9, Canada
Publication date: 2004-11-01