Premium
Salt stress and resistance to hypoxic challenges in the common carp ( Cyprinus carpio L.)
Author(s) -
Boeck G.,
Vlaeminck A.,
Linden A.,
Blust R.
Publication year - 2000
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.1095-8649.2000.tb00273.x
Subject(s) - cyprinus , common carp , biology , oxygen , hyperventilation , carp , hypoxia (environmental) , zoology , brackish water , medicine , ecology , fishery , salinity , chemistry , fish <actinopterygii> , organic chemistry
Long term exposure to brackish water (171 mm NaCl) affected the capacity of common carp Cyprinus carpio to deal with hypoxic conditions and the critical oxygen concentrations for oxygen consumption increased. In addition, regulation of ammonia excretion was lost. The cytosolic phosphorylation potential (the index of the energy status of a cell in terms of potential transferable phosphate groups) in the lateral muscle on the other hand remained relatively unaffected, indicating that oxygen transport to the tissues was not severely compromised. It appears that exposure to brackish water reduces the capacity of common carp to cope with hypoxic conditions mainly because of the high energetic cost of hyperventilation under conditions where energy stores are depleted, and not because of any impeded oxygen transport mechanisms.