Effects of sodium and calcium on acute toxicity of un-ionized ammonia to Atlantic salmon and lake trout

R. W. Soderberg; J. W. Meade

doi:10.1300/j028v01n04_07

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Effects of sodium and calcium on acute toxicity of un-ionized ammonia to Atlantic salmon and lake trout

R. W. Soderberg·J. W. Meade

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Abstract

Acute, static 6-hour toxicity tests were conducted on two sizes each of lake trout and Atlantic salmon in the presence of three levels each of NaCl and CaCl 2 . Calcium did not protect smolts from NH 3 toxicity but had no effect on the tolerance of Atlantic salmon fry to NH 3 . Both cations increased the tolerance of 8-g lake trout fingerlings to NH 3 , but neither significantly affected the toxicity of NH 3 to 0.9-g lake trout fry. These results suggest that the mitigating effects of solution cations of NH 3 toxicity may be related to species, size, and life stage.

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R. W. Soderberg, J. W. Meade. 1992. Effects of sodium and calcium on acute toxicity of un-ionized ammonia to Atlantic salmon and lake trout. https://doi.org/10.1300/j028v01n04_07

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