Comparative Study on Application Effect of Different Lipid Sources in Compound Feeds for Hybrid Snakehead(Channa argus ♂×Channa maculate ♀)
As to reduce the dependence of aquatic compound feeds on fish oil and soybean oil and to develop new lipid sources,five iso-nitrogenous and iso-lipid(48％crude protein,12％crude lipid)compound feeds(D1 to D5)with different lipid sources were formulated in this study,of which D1 lipid source was compound oil 1(tilapia oil∶soybean oil=1∶1),D2 was compound oil 2(linseed oil∶soybean oil=1∶2),D3 was com-pound oil 3(fish oil∶cottonseed oil∶palm oil∶linseed oil=3∶3∶3∶1),D4 was tilapia oil,and D5 was soybean oil.The above diets were used to breed juvenile hybrid snakehead(Channa argus ♂× Channa maculate ♀)with initial body weight of(112.09±0.15)g of five groups in an indoor recirculation system for 60 days,re-spectively.The results showed that:in terms of growth performance and muscle conventional nutritional com-ponent contents,there were no significant differences among all groups(P＞0.05).With regard to biochemical indexes,there were no significant differences in serum alkaline phosphatase activity,liver total antioxidant ca-pacity and the malondialdehyde content in serum,liver and intestine of fish in all groups(P＞0.05),but had significant effects on other biochemical indexes(P＜0.05),in which,D3 group had the lowest serum total cholesterol,triglyceride and low-density lipoprotein contents,liver triglyceride and crude lipid contents,and it had the highest serum total antioxidant capacity and high-density lipoprotein content,serum,liver and intestinal acid phosphatase,superoxide dismutase and catalase activities,as well as intestinal alkaline phosphatase activi-ty.With regard to muscle quality,D3 group fish had the highest muscle C20∶5n-3(EPA)and C22∶6n-3(DHA)contents and muscle chewiness and gumminess,and the EPA content in D3 group was significantly higher than that of other groups(P＜0.05),the DHA content was significantly higher than that of D1,D2 and D5 groups(P＜0.05),the chewiness was significantly higher than that of D2 and D4 groups(P＜0.05),and the gumminess was significantly higher than that of D1,D2 and D4 groups(P＜0.05).In summary,under the conditions of this experiment,diet with compound oil 3 as lipid source not only can ensure the growth effect,but also can enhance immunity and antioxidant capacity,and improve muscle quality of hybrid snakeheads.[Chinese Journal of Animal Nutrition,2024,36(12):7943-7955]
万方数据
维普
