Three different levels of dietary vitamin D3 fed to first-feeding fry of Atlantic salmon (Salmo salar L.): effect on growth, mortality, calcium content and bone formation |
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| Authors: | IE GRAFF S HØIE GK TOTLAND & Ø LIE |
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| Institution: | Institute of Nutrition, Directorate of Fisheries, Bergen, Norway,;National Veterinary Institute, Oslo, Norway,;Department of Zoology, University of Bergen, Realfagbygget, Bergen, Norway |
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| Abstract: | Atlantic salmon ( Salmo salar L.) fry were reared on a fishmeal-based diet with three different levels of vitamin D3 (0.2, 5 and 57 mg vitamin D3 kg–1 feed, ww) from first-feeding for 14 weeks. No significant differences were recorded in weight, length, specific growth rate, mortality, or kidney calcium concentration between the different dietary groups. No skeletal malformations or histopathological changes were recorded in any of the dietary groups. These results suggest Atlantic salmon fry to be highly tolerant of megadoses of vitamin D3 over a limited period of time. |
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| Keywords: | bone deformities calcium cholecalciferol first-feeding fish toxicity vitamin D3 |
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