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Distribution of aldehyde dehydrogenase and alcohol dehydrogenase in summer‐acclimatized crucian carp, Carassius carassius L.
Author(s) -
Nilsson G. E.
Publication year - 1990
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.1095-8649.1990.tb05593.x
Subject(s) - crucian carp , biology , alcohol dehydrogenase , aldehyde dehydrogenase , lactate dehydrogenase , carassius auratus , carp , zoology , cyprinus , biochemistry , enzyme , fishery , fish <actinopterygii>
The tissue distribution of aldehyde dehydrogenase (ALDH) and alcohol dehydrogenase (ADH) in summer‐acclimatized crucian carp showed almost the same exceptional pattern as previously found in winter‐acclimatized specimens. There was a nearly complete spatial separation of ALDH and ADH; in other vertebrates these enzymes occur together. This exceptional enzyme distribution is probably an adaptation to the extraordinary ability of Carassius to produce ethanol as the major metabolic end product during anoxia. Since the crucian carp is less likely to encounter anoxia during the summer, the present results suggest that the crucian carp is unable to switch over to a ‘normal’ ALDH and ADH distribution in the summer. However, it is also possible that there is an advantage for the summer‐acclimatized crucian carp in keeping ALDH and ADH separate, because of occasional anoxic periods.