期刊
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
卷 134, 期 2, 页码 265-270出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S1096-4959(02)00256-7
关键词
alpha-tocopheryl acetate; fish; lipid; nutrition; peroxidation; tilapia; vitamin E; Raman spectroscopy
A feeding trial was conducted to evaluate the effects of dietary vitamin E contents on the growth, ascorbate induced iron-catalyzed lipid peroxidation in post-mortem muscle and liver tissue, and Raman spectral changes in lens of juvenile hybrid tilapia (Oreochromis niloticus X O. aureus). Experimental fish were fed practical diets supplemented with 0, 50, 100, 200, 450 and 700 mg alpha-tocopheryl acetate/kg diet for 14 weeks. There was no significant difference in weight gain, feed conversion ratio and protein efficiency ratio among fish fed test diets (P>0.05). Protein content of fish fed diet containing the lowest vitamin E level was the lowest (P<0.05) among all groups. No difference was found in other body constituents among test fish (P>0.05). The thiobarbituric acid-reactive substances produced by iron-catalyzed lipid peroxidation in muscle and liver tissue of fish fed the diet without alpha-tocopheryl acetate supplementation were significantly (P<0.05) greater than those from fish fed diets containing higher levels of alpha-tocopheryl acetate. Dietary vitamin E supplementation increased the antioxidant capability of tilapia tissues against lipid peroxidation. Further, dietary vitamin E supplementation also influenced the lens cortical membrane structure of tilapia. (C) 2002 Elsevier Science B.V. All rights reserved.
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