ISSN:
1573-5133
Keywords:
Vitamin D
;
Thyroid gland
;
Growth
;
Endocrines
;
Trout
;
Calcium
;
Thyroxine
;
Triiodothyronine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Synopsis Diets deficient in vitamin D effected a significant increase in plasma triiodothyronine (T3) concentration in raibow trout (Salmo gairdneri); different levels of dietary calcium exerted no effect on plasma T3 levels. These effects of vitamin D deficiency on plasma T3 levels appeared to be reversible, vitamin D supplementation after a period of vitamin D deficiency lowered T3 levels. Vitamin D3, vitamin D2 and the metabolites 25(OH)-D3 and 1, 25(OH)2D3 were all effective in lowering plasma T3 levels; vitamin D3 appeared to be more effective than vitamin D2. There appeared to be a correlation between weight gain and plasma T3 concentration in the groups fed different types and levels of vitamin D supplementation suggesting that the increased T3 levels may be a compensatory increase to the reduced weight gain of the vitamin D deficient fish. Plasma T4 levels were not affected by dietary vitamin D deficiency.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02391624
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