饲料n-3/n-6脂肪酸比值对军曹鱼生长及鱼体组织脂肪酸组成的影响  

Effects of feedstuff n-3/n-6 fatty acid ratio on growth,fatty acid composition in tissues of juvenile cobia(Rachycentron canadum)

作　　者：周萌[1] 曹俊明[1] 梁海鸥[2] 吴建开[1] 蓝汉冰[1] 赵红霞[1] 马利[1] 

机构地区：[1]广东省农科院畜牧研究所,广东广州510640 [2]广东恒兴集团有限公司,广东湛江524000

出　　处：《广东农业科学》2006年第12期77-81,共5页Guangdong Agricultural Sciences

基　　金：广东省科技攻关项目(2003B21504)

摘　　要：以精制鲽鱼油和豆油分别作为n-3及n-6系列脂肪酸源,配制5种不同n-3/n-6脂肪酸比值的饲料,进行连续8周饲喂军曹鱼幼鱼试验。结果表明,当饲料中的n-3/n-6脂肪酸比值为2.57时,军曹鱼的增重率和饲料效率最高;饲料中不同n-3/n-6脂肪酸比值对军曹鱼血清5项生理指标的影响不显著,但随着n-3/n-6脂肪酸比值的降低,血清中的谷丙转氨酶、谷草转氨酶、胆固醇含量表现出下降趋势;饲料中n-3、n-6多不饱和脂肪酸含量,与军曹鱼肌肉和肝脏的n-3、n-6多不饱和脂肪酸含量呈正相关。统计分析表明,军曹鱼饲料中适宜的n-3、n-6脂肪酸比例为2.98∶1。The effects of different feedstuff n- 3/n- 6 ratios on growth and tissue fatty acids composition of juvenile cobia were studied with refined fish oil and soy oil as n - 3 and n 6 series of fatty acids source. The results showed that the cobia had the highest weight gain rate and feed efficiency when n- 3/n 6 fatty acid ratio was 2.57, and five serum biochemical indices of five trial groups had no significant difference, but ALT, AST and TC inclined to decrease with the n - 3/n - 6 fatty acid ratio decreasing, n- 3 and n 6 PUFA in the muscle were positive correlated with that in the feedstuff. The optimum feedstuff n- 3/n- 6 fatty acid ratio for cobia was 2.98.

关 键 词：军曹鱼 N- 3/n-6脂肪酸比值 生长 脂肪酸组成 

分 类 号：S965.8[农业科学—水产养殖]