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为研究植物油替代鱼油对瓦氏黄颡鱼(Pelteobagrus vachelli)生长及肌肉脂肪组成的影响及重投喂鱼油对瓦氏黄颡鱼肌肉脂肪酸组成的影响,实验以大豆油分别替代饲料中的0(FO)、50(S1)、75(S2)和100%(SO)的鱼油配制等氮、等能的颗粒饲料,每组设置3个平行,养殖80d后,再投喂鱼油30d。结果表明,饲料中添加豆油不会显著影响瓦氏黄颡鱼的增重率、肝体指数和体成分(P>0.05)。随着饲料中大豆油含量的增加,S2和SO组肌肉中C18:1n-9、C18:2n-6和单不饱和脂肪酸比例显著增加(P<0.05),而C20:5n-3,C22:5n-3及n-3/n-6比例显著下降(P<0.05)。再投喂鱼油30d后,SO组肌肉中C18:3n-6、C20:4n-6、Σn-9、Σn-6和S2组中C18:1n-9、Σn-6比例显著下降(P<0.05),而S2和SO组肌肉中Σn-3多不饱和脂肪酸、C20:5n-3和C22:5n-3比例显著增加(P<0.05)。在生产中,可采用先植物油饲料、后鱼油饲料的养殖方式提高瓦氏黄颡鱼肌肉品质(增加有益人类健康的多不饱和脂肪酸)。
In order to study the effects of vegetable oil on the growth and muscle fat composition of Pelteobagrus vachelli and the re-feeding of fish oil on muscle fatty acid composition of Pelteobagrus vachelli, FO), 50 (S1), 75 (S2) and 100% (SO) of fish oil preparation and other nitrogen and other energy particles feed, set three parallel in each group, cultured 80d, and then fed fish oil 30d. The results showed that the addition of soybean oil to feed did not significantly affect the weight gain rate, liver index and body composition (P> 0.05). With the increase of soybean oil content in diet, the proportion of C18: 1n-9, C18: 2n-6 and monounsaturated fatty acids in muscle of S2 and SO increased significantly (P <0.05) 5n-3 and n-3 / n-6 ratio decreased significantly (P <0.05). After fed with fish oil for 30 days, the proportion of C18: 1n-9 and Σn-6 in C18: 3n-6, C20: 4n-6, ), While the proportion of Σn-3 polyunsaturated fatty acids, C20: 5n-3 and C22: 5n-3 in muscle increased significantly in S2 and SO groups (P <0.05). In the production, the first vegetable oil feed can be used, and the fish oil feed breeding method can improve the muscle quality (increase the beneficial human health of polyunsaturated fatty acids).