Sodium uptake rates were measured in wild and hatchery reared Norwegian brown trout (Salmo trutta) exposed to media of a range of pH. Sodium uptake was strongly dependent on external acidity, being reduced in media of low pH. Wild fish from the naturally acid R. Tovdal (S. Norway) were more tolerant of acid media than hatchery reared fish. The effects of increasing external sodium concentrations were strongly influenced by low external pH. The results are discussed with respect to brown trout population decline in certain areas of S. Norway.
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JOURNAL ARTICLE| 01 October 1980
Effects of pH on Sodium Uptake in Norwegian Brown Trout (Salmo Trutta) from an Acid River
PHILIP G. McWILLIAMS
1 Department of Biological Sciences, University of Lancaster, Lancaster LA1 4YQ, U.K.
Revision Received: 18 Feb 1980
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1980 by Company of Biologists
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PHILIP G. McWILLIAMS; Effects of pH on Sodium Uptake in Norwegian Brown Trout (Salmo Trutta) from an Acid River. J Exp Biol 1 October 1980; 88 (1): 259–268. doi: https://doi.org/10.1242/jeb.88.1.259
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