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Preliminary examination of oxidative stress in juvenile spring Chinook salmon Oncorhynchus tshawytscha of wild origin sampled from transport barges

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Migrating juvenile wild Chinook salmon Oncorhynchus tshawytscha, collected and loaded onto transport barges at Lower Granite Dam on the Snake River, were sampled from barges at John Day Dam, 348 km downstream, at 5 day intervals beginning in late April and ending in late May. An increase in lipid peroxidation and decrease in vitamin E in liver were observed from early to late in the barge transportation season. These changes seemed unrelated to changes in plasma cortisol or corresponding glucose levels, which declined from early to late in the season, or the concentration of n-3 highly unsaturated fatty acid (HUFA) concentrations in tissue but may be related to water temperature, which increased during the transport season, or other changes associated with the parr–smolt transformation.

Keywords: HUFA; cortisol; dam passage; lipid peroxidation; vitamin E

Document Type: Research Article


Affiliations: Idaho Cooperative Fish and Wildlife Research Unit, United States Geological Survey, College of Natural Resources, University of Idaho, Moscow, ID 83844-1141, U.S.A.

Publication date: November 1, 2009


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