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Is there a synergistic effect between steady‐state exercise and water acidification in carp?
Author(s) -
Dijk P. L. M.,
Thillart G. E. E. J. M.,
Bonga S. E. Wendelaar
Publication year - 1993
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1993.tb00376.x
Subject(s) - cyprinus , carp , biology , gill , zoology , common carp , plasma concentration , medicine , endocrinology , fishery , fish <actinopterygii>
Carp ( Cyprinus carpio ) fitted with arterial catheters were trained to swim in a swim tunnel. While constantly swimming at two body lengths per second, they were subjected to gradual water acidification (from pH 7–6 to 40 in 4 h), and monitored subsequently over 24 h. It was hypothesized that exercise would expose the gills to a larger extent and that conseq uently the effect of water acidification would be greater in exercising than in resting carp. In contrast to our earlier study with resting carp we found a constant dedine of plasma pH, and of plasma Na + and Cl concentration, indicating ionoregulatory failure. While plasma catecholamincs remained at control levels, the plasma cortisol showed a three‐ to four‐fold increase over the first 7 h. This was followed by a slow decline. We conclude that there is a synergistic effect between moderate exercise and gradual water acidification.