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Effect of excess vitamin D 3 on calcium metabolism in rainbow trout Salmo gairdneri Richardson
Author(s) -
Hilton J. W.,
Ferguson H. W.
Publication year - 1982
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.1095-8649.1982.tb02842.x
Subject(s) - rainbow trout , salmo , trout , biology , calcium , endocrinology , medicine , vitamin , zoology , fishery , fish <actinopterygii>
The effect of excess vitamin D 3 on calcium metabolism in rainbow trout was investigated. Trout were reared for 24 weeks on diets containing 4000, 104 000 or 1 004 000 iu of supplemental vitamin D 3 kg ‐1 dry diet. No effect of excess vitamin D 3 was detected in the weight gain, feed efficiency or total mortalities of trout in the different groups. None of the fish showed any signs of hypercalcaemia and no significant difference was detected in the calcium, magnesium, phosphorus and sodium content of the trout vertebrae or total carcass. However, there was a significant increase in the calcium, magnesium and phosphorus content of the skin in trout reared on the highest supplemental level of vitamin D 3 (1 004 000 iu kg ‐1 diet). No overt signs of renal calcinosis were detected in any of the trout. This study indicates that trout are resistant to excess vitamin D 3 , and that excess vitamin D 3 does not appear to be related to the increased incidence of renal calcinosis in rainbow trout.