デヒドロ-L-アスコルビン酸のニジマスに対するビタミンC源としての効果〔英文〕

概要

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Dehydro-L-ascorbic acid (DAsA), an oxidized form of L-ascorbic acid (AsA), was tested for efficacy as a vitamin C source and safety in young rainbow trout Onchorhynchus mykiss. The fish, weighing about 100g on average, were fed with experimental diets containing various levels of DAsA or AsA for 6 weeks. The fish receiving the AsA-deficient diet had very low concentrations of AsA in several tissues and plasma. In the fish fed with the DAsA-supplemented diet, similar to those fed with the AsA-supplemented diet, only the AsA level rose markedly, whereas DAsA did not increase. There were no statistical differences in the AsA and DAsA concentrations in the various tissues and plasma between AsA- and DAsA-supplemented groups. The glutathione levels of tissues and hematological parameters did not vary between the AsA- and DAsA-supplemented groups. In addition, no cell disruption was brought about by DAsA administration.These results suggest that dietary DAsA is readily reduced to AsA in the fish body and can be effectively utilized by the rainbow trout as a vitamin C source.
日本水産學會の論文