Abstract
During exposure to soft water, acidified to pH 4.0, the haemolymph concentrations of Na+, K+, and Cl− decreased whereas the Ca2+ concentration fluctuated in Astacus astacus. The haemocyte content of K+ decreased from 9% to 2% of the total haemolymph K+ content after exposure to pH 3.7 for 3 days. Within 14 days, 250 µg Al3+ l−1, as Al2(SO4)3 at pH 5.0, reduced the haemolymph Na+ content in Astacus astacus and Pacifastacus leniusculus, however, the effects were less pronounced than earlier reported for fish. Disturbed ion regulation, mainly depending on low pH, is thought to contribute to the absence of these species in acid waters.
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Appelberg, M. Changes in haemolymph ion concentrations of Astacus astacus L. and Pacifastacus leniusculus (Dana) after exposure to low pH and aluminium. Hydrobiologia 121, 19–25 (1985). https://doi.org/10.1007/BF00035225
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DOI: https://doi.org/10.1007/BF00035225