论文部分内容阅读
通过对45 日龄( 长约2 .2cm) 中华乌塘鳢人工繁育幼苗的2 个月对比养殖试验, 结果显示, 以进口白鱼粉为主要成分, 添加适当的诱食剂配制成的人工配合饵料组中华乌塘鳢幼鱼增重和成活率高于鲜饵料( 鲜小杂鱼) 组( 即对照组) 的水平。其中增重最快的人工配合饵料组( Ⅰ组) 试验结束时尾均重达3 .047g , 成活率达84 .6 % , 而对照组( Ⅲ组) 的尾均重1 .226g , 成活率62.0 % 。当配方中的白鱼粉全部被国产红鱼粉取代时,饲养效果差,添加大豆磷脂或鱼用复合酶并不能改善饲养效果。
By comparing the two-month comparative culture experiment of 45 days old (about 2.2 cm) artificial breeding seedlings of O. chinensis, the results showed that with the imported white fish meal as the main component, the artificial bait The weight gain and survival rate of juvenile Chinese black-tailed juveniles were higher than that of the fresh bait (fresh trash fish) group (control group). The weight gain of the fastest artificial diet group (group Ⅰ) at the end of the test all weighing up to 3. 047g, survival rate of 84. 6%, while the control group (group Ⅲ) the average weight of 1. 226g, the survival rate of 62.0%. When the formula in the white fish meal were all replaced by the domestic red fish meal, feeding effect is poor, add soy lecithin or fish with enzyme does not improve the feeding effect.