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Coho salmon haematological, metabolic and acid‐base changes during exercise and recovery in sea water
Author(s) -
Cech J. J.,
McEnroe M.,
Randall D. J.
Publication year - 2004
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.0022-1112.2004.00489.x
Subject(s) - oncorhynchus , biology , seawater , upwelling , fishery , smoltification , zoology , medicine , ecology , fish <actinopterygii> , salmonidae , rainbow trout
Cannulated, seawater‐acclimated coho salmon Oncorhynchus kisutch were swum to exhaustion in a seawater tunnel (10° C, mean U crit 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.