QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by McWILLIAMS, P. G. Search for Related Content PubMed Articles by McWILLIAMS, P. G.

Journal of Experimental Biology 88,259-268 (1980)
Published by Company of Biologists 1980

Effects of pH on Sodium Uptake in Norwegian Brown Trout (Salmo Trutta) from an Acid River

PHILIP G. McWILLIAMS ¹

¹ Department of Biological Sciences, University of Lancaster, Lancaster LA1 4YQ, U.K.

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.