饲料脂肪水平对红白锦鲤体色、生长及部分生理生化指标的影响

本实验以初始体重为(5.85±0.19)g的红白锦鲤幼鱼为实验对象,研究在虾青素添加量为130 ms/kg时饲料脂肪水平(5.60%、7.93%、9.95%、11.93%、14.20%)对锦鲤体色、生长以及生理生化指标的影响.每组设3个平行,每个平行饲养10尾鱼,表观饱食投喂60d后,实验结果显示:脂肪水平为9.95%...

Effects of Dietary Lipid Levels on Body Pigmentation, Growth, Partial Physiological and Biochemical Indexes of Ornamental Carp (Cyprinus carpio L)

A feeding trial was conducted to investigate the effects of dietary lipid levels on body pigmentation, growth, partial physiological and biochemical indexes of Ornamental Carp （Cyprinus carpio L） （initial mean body weight： 5.85 ±0.19 g）. Five experimental diets containing different lipid levels （5.60% , 7.93% , 9.95% , 11.93% , 14.20% ） were formulated and fed to apparent satiety to five groups of i0 fish for 60 days, each diet contained 130 mg/kg astaxanthins. The results show that the value of a ＊ was the highest at the level of 9.95%, but the differences was no significance, while the concentration of carotenoid in the skin of fish was significantly different from other experimental groups （ P 〈 0.05 ）. The body weight gain and feed conversion ratio increased significantly with the dietary lipid level increased from 5.60% to 9.95%. There were no significant effects on ALT, CHO1 and TG blood biochemical （ P 〉 0.05 ）. The CAT and SOD activity decreased observely from 5.60% to 9.95% （P 〈 0.05 ）. The results show that the lipid level of 9.95% dietary contained equivalent astaxanthin was effective in growth and modifying the body color. The results of this study also illustrate that the utilization of astaxanthin of Ornamental Carp （ Cyprinus carpio L） did not improve constantly with the increase of lipid level of dietary in diet.