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饲料中不同脂肪源对军曹鱼生长及脂肪酸组成的影响

作  者:
刘兴旺;谭北平
单  位:
广东海洋大学水产动物营养与饲料学研究室;广东恒兴饲料实业股份有限公司
关键词:
军曹鱼;脂肪酸需要;n-3HUFA;摄食和营养
摘  要:
以鱼粉、豆粕和酪蛋白为主要蛋白源,小麦粉为糖源,配制出基础饲料。分别在基础饲料中添加7.5%的牛油(BT)、鱼油(MFO)、豆油(SO)、玉米油(CO)或花生油(PO)作为不同脂肪源,制出5种等氮等能的试验饲料,并以此饲料投喂军曹鱼幼鱼(8.3±0.5g)8周。试验结果显示,饲料中的脂肪源显著影响军曹鱼的生长(SGR)和肌肉、肝脏的脂肪酸组成(P<0.05)。投喂饲料中含有鱼油的军曹鱼表现出最好的特定生长率,其次分别为豆油组、花生油组、玉米油组和牛油组。鱼油对军曹鱼有较高的营养价值,其中的EPA和DHA等n-3系列高不饱和脂肪酸(n-3HUFA)是军曹鱼的必需脂肪酸。
译  名:
Effect of different fat source on growth and fatty acid composition of cobio
作  者:
Liu Xing-Wang,Tan Bei-Ping
关键词:
cobia;fatty acid requirement;n-3 HUFA;ingestion and nutrition
摘  要:
A study was conducted to evaluate the effects of dietary lipids 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 fish oil had the highest SGR, closely followed by soybean oil, peanut oil, corn oil and beef tallow diets(P<0.05). Fatty acid composition in muscle and livers of cobia reflected those of the dietary lipids, especially for the diets containing unsaturated fatty acid. These data indicate that MFO showed a higher nutritional 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.

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