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Changes in ammonia and amino acid levels in the erythrocytes and plasma of carp, Cyprinus carpio , during passage through the gills
Author(s) -
Ogata H.,
Murai T.
Publication year - 1988
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.1095-8649.1988.tb05488.x
Subject(s) - gill , cyprinus , carp , biology , ammonia , glutamine , amino acid , medicine , common carp , endocrinology , biochemistry , anatomy , fishery , fish <actinopterygii>
Differences in ammonia and free amino acid levels between the dorsal aorta (post‐gills) and bulbus arteriosus (pre‐gills) were studied in sixteen unanaesthetized carp, Cyprinus carpio , to clarify he roles of erythrocytes in inter‐organ transport of these substances. Both erythrocyte and lasma ammonia concentrations decreased significantly during passage through the gills, and the erythrocyte contribution (53%) to the total net decrease of ammonia on a whole blood basis was approximately equal to that by the plasma (47%). The glutamine level in the plasma showed no significant change, but that in the erythrocytes increased slightly. There were losses of some amino acids from the plasma circulating through the gills, while significant increases were noted in the erythrocytes, i.e., changes in the concentrations of most amino acids were in opposite directions in the erythrocytes and plasma across the gills. The results of this study show that not only plasma but also erythrocytes are involved in ammonia and amino acid transportations in carp.