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Blood osmolality shift in juvenile red drum, Sciaenops ocellatus L. exposed to fresh water
Author(s) -
Crocker P. A.,
Arnold C. R.,
DeBoer J. A.,
Holt G. J.
Publication year - 1983
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.1095-8649.1983.tb02910.x
Subject(s) - juvenile , biology , zoology , fishery , plasma osmolality , fish <actinopterygii> , fresh water , osmoregulation , osmotic pressure , salinity , ecology , vasopressin , endocrinology , botany
Juvenile red drum, Sciaenops ocellatus , measuring 40–49 mm s.l. tolerated abrupt transfer from 28%osalinity sea water to fresh water (< l%o). A significant shift in blood osmolality from a level of about 350 mosmol l −1 in sea water to a new level of about 311 mosmol l −1 was experienced by fish after 48 h in fresh water. The shift was followed by a slight reduction in blood osmolality to a sustained level of 300 mosmol l −1 after 96 h exposure to fresh water. The overall effect of increased environmental calcium on blood osmotic pressure of young red drum was not significant at the level tested.