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Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon (Oncorhynchus kisutch)

October 6, 2015

The effects of chronic (6 months) exposure to arsenic trioxide in fresh water on the Parr-smolt transformation of coho salmon (Oncorhynchus kisutch) were evaluated. Exposure to 300 μg As/L (as As2O3) appeared to delay the onset of the normal increase in plasma thyroxine concentration and cause a transient reduction of gill Na+,K+-ATPase activity. Fish exposed to 300 μg As/L also migrated to the sea less successfully than did nonexposed smolts, but there were no effects on the survival and growth of smolts held in 28‰ salt water for 6 months.

Citation Information

Publication Year 1984
Title Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon (<i>Oncorhynchus kisutch</i>)
DOI 10.1002/etc.5620030116
Authors J.W. Nichols, Gary Wedemeyer, F.L. Mayer, Walton W. Dickhoff, S.V. Gregory, W. T. Yasutake, S.D. Smith
Publication Type Article
Publication Subtype Journal Article
Series Title Environmental Toxicology and Chemistry
Series Number
Index ID 70162169
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center