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