Abstract
Whole-body (but predominantly gill) Na+ exchange, gill Na+/K+/ATPase activity and seawater tolerance were examined in juvenile Atlantic salmon during the smolting period. Transepithelial net Na+ gain decreased steadily from late February showing a net loss in April and early May, returning to approximate equilibrium in mid-May. This seasonal net loss of Na+ to the environment occurred slightly after maximal gill epithelial Na+/K+/ATPase activity and preceded maximal seawater tolerance. The results are discussed in relation to changes in gill permeability and salt intake via the diet.
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Primmett, D.R.N., Eddy, F.B., Miles, M.S. et al. Transepithelial ion exchange in smolting atlantic salmon (Salmo Salar L.). Fish Physiol Biochem 5, 181–186 (1988). https://doi.org/10.1007/BF01874794
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DOI: https://doi.org/10.1007/BF01874794