动物营养学报2015，Vol.27Issue(11)：3448-3456,9.DOI:10.3969/j.issn.1006-267x.2015.11.016
饲料脂肪水平对美国红鱼生长性能、体组成和肝脏组织结构的影响
Effects of Dietary Lipid Level on Growth Performance, Body Composition and Liver Histological Structure of Red Drum ( Sciaenops ocellatus)
摘要
Abstract
A 57-day feeding experiment was conducted to determine the effects of dietary lipid level on growth performance, body composition and liver histological structure of red drum ( Sciaenops ocellatus) . Five isoni-trogenous diets ( contained 47% crude protein) were designed to contain five dietary lipid levels ( 7. 19%, 9.17%, 10.94%, 13.04%, 14.20%, respectively) , and each diet was randomly assigned to 4 replicates of 30 red drum [average body weight of (19.88±0.26) g]. The results showed that the final average body weight (FBW), weight gain rate (WGR) and specific growth rate (SGR) in the 7.19% group were significantly higher than those in the 13.04% and 14.20% groups ( P<0.05) , and no significant differences were found a-mong the three lower level groups (7.19%, 9.17% and 10.94% groups). With the increase of dietary lipid level, the protein efficiency ratio ( PER) showed a descending trend, while conversely the feed conversion rati-o ( FCR) showed a rising tendency, and the FCR in the 7.19% and 9.17% groups was significantly lower than that in the 13.04% and 14.20% groups ( P<0.05) . Moreover, viscerasomatic index ( VSI) and mesenteric fat index ( MFI) in the 13.04% and 14.20% groups were significantly higher than those in the other three groups ( P<0.05) . Lipid content in whole body and liver was increased with the increase of dietary lipid level, which of 7.19% group came to be the lowest, though the crude protein content in whole body of 9.17% group seemed to be the highest. Histological examinations indicated that the severity of fatty degeneration in liver cells of red drum had a positive relationship with the dietary lipid level. In conclusion, the dietary lipid level in artificial formulated feed for red drum is recommended to be 7.19% to 9.17%.关键词
美国红鱼/饲料脂肪水平/生长/体组成/肝脏组织结构Key words
red drum ( Sciaenops ocellatus)/dietary lipid level/growth/body composition/liver histological structure分类
农业科技引用本文复制引用
李雪菲,田丽霞,牛津,刘福佳,刘永坚..饲料脂肪水平对美国红鱼生长性能、体组成和肝脏组织结构的影响[J].动物营养学报,2015,27(11):3448-3456,9.基金项目
国家自然科学基金项目(31172419) （31172419）
广东省科技计划项目(2013B090600045) （2013B090600045）
珠海市科技计划项目(2012D0501990008) （2012D0501990008）
