Influence of different lipids on growth and fatty acid composition of juvenile cobia (Rachycentron canadum)
A study was conducted to evaluate the effects of different kinds of dietary lipid on growth and fatty acid composition of juvenile cobia(Rachycentron canadum).Five semi-purified diets containing 43.5% crude protein with 20.0 MJ available energy/kg were supplemented with 7.5% of either beef tallow(BT),soybean(SO),peanut(PO),corn(CO)or menhaden fish oils (MFO).The diets were fed to triplicate groups of 20 fish(8.3±0.5g)for 56 days.Results showed that fish fed the diets containing beef tallow,corn and peanut oils had significantly(P<0.05)reduced SGR and SGR was best for fish fed the diet contain menhaden fish oil.Fish fed the ~ soybean oil diet had the second highest weight gain,followed by fish on peanut oil,corn oil and beef tallow diets,respectively.Fatty acid composition in cobia muscle and livers was significantly reflected by that of the dietary lipids,especially for the diets containing unsaturated fatty acid.These data indicate that MFO showed a higher value for juvenile cobia and that n-3 highly unsaturated fatty acids such as eicosapentaenoic(20∶5n-3)and docosahexaenoic(22∶6n-3)acids in MFO are essential for maximum growth of cobia.
fish nutrition cobia,Rachycentron canadum lipids fatty acid composition
Xingwang Liu Beiping Tan Kangsen Mai Qinghui Ai Zhiguo Liufu Wei Xu Hongming Ma Wenbing Zhang
Key Laboratory of Mariculture(Ministry of Education),Ocean University of China,Qingdao 266003,P.R.China
国内会议
青岛
英文
104-115
2007-08-01（万方平台首次上网日期，不代表论文的发表时间）