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

J.W. Nichols·Gary Wedemeyer·F.L. Mayer·Walton W. Dickhoff·S.V. Gregory·W. T. Yasutake·S.D. Smith
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Abstract

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 As 2 O 3 ) 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.

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J.W. Nichols, Gary Wedemeyer, F.L. Mayer, Walton W. Dickhoff, S.V. Gregory, W. T. Yasutake, S.D. Smith. 1984-01-01. Effects of freshwater exposure to arsenic trioxide on the parr-smolt transformation of coho salmon ( Oncorhynchus kisutch ). https://doi.org/10.1002/etc.5620030116

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