Premium
Influence of Ambient Salts on Plasma Thyroxine Concentration in Juvenile Coho Salmon
Author(s) -
Specker Jennifer L.,
Schreck Carl B.
Publication year - 1984
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1984)113<90:ioasop>2.0.co;2
Subject(s) - oncorhynchus , juvenile , chemistry , endocrinology , medicine , plasma concentration , seawater , plasma osmolality , zoology , fishery , biology , fish <actinopterygii> , ecology , vasopressin
Juvenile coho salmon Oncorhynchus kisutch were maintained for 3 weeks in well water supplemented with low concentrations of NaCl (12 to 24 mM) or CaCl 2 (6 to 12 mM) to determine the effect on plasma thyroxine (T 4 ) concentrations. Exposure to 12 to 24 mM NaCl increased plasma T 4 concentrations, whereas exposure to 6 to 12 mM CaCl 2 had no effect. A 24‐hour exposure to seawater (75% or 345 mM NaCl) generally reduced T 4 concentrations. These findings suggest that the beneficial effects of salt supplementation during early salmonid development may be due, in part, to stimulation of thyroid activity. Received April 12, 1983 Accepted November 17, 1983