关键词：
翘嘴红;蛋白质需要量;鱼体增重;特定生长率;饲料效率;蛋白质效率
摘 要：
用酪蛋白和白鱼粉为蛋白源配制7种蛋白含量为32.07%～45.64%的半精制试验饲料,喂养7组3个重复的翘嘴红幼鱼8周。饲养试验在室内玻璃钢水箱中进行,试验鱼每尾平均初始体重2.88±0.22g,水温为25～29℃。结果显示:蛋白质水平为41.05%的试验组的鱼体增重、特定生长率、饲料效率和蛋白质效率等指标均显著高于其它试验组(P<0.05);对特定生长率(Y)和饲料效率(F)二项指标的二次曲线回归分析求得翘嘴红幼鱼饲料蛋白最适值分别为40.94%和41.35%;饲料蛋白水平对鱼体(全鱼)的水分、粗蛋白和粗灰分的含量无显著影响(P>0.05),而较高水平饲料蛋白会使鱼体脂肪含量明显降低(P<0.05)。
译 名：
Dietary protein requirement of Erythroculter ilishaeformis juvenile
作 者：
CHEN Jian-ming, YE Jin-yun, WANG You-hui, PAN Qian (Zhejiang Institute of Freshwater Fisheries, Huzhou313001, China)
关键词：
Erythroculter ilishaeformis; protein requirement; weight gain; specific growth rate; feed efficiency; protein efficiency ratio
摘 要：
7 semi-purified diets formulated with casein and white fish meal as protein sources to contain graded levels of protein ranging from 32.07% to 45.64% were fed to Erythroculter ilishaeformis(initial weight 2.88±0.22g·ind~(-1)) in triplicate for 8 weeks. The feeding trial was conducted in fiberglass tanks in which the water temperature during the feeding was controlled from 25℃ to 29℃. The results showed that the weight gain, specific growth rate, feed efficiency and protein efficiency ratio of fish fed a test diet with (41.05%) crude protein on dry basis were significantly higher (P<0.05) than those of the rest groups. Based on quadratic model regression analysis of SGR and FE, it was found that the optimal protein requirements were 40.94% and 41.35% of dry diet respectively. Moreover, there was no significant effect of dietary protein levels on whole body moisture, protein and ash(P>0.05), but its body lipid decreased (P<0.05) when the fish were fed 2 diets with high levels of dietary protein at the end of the feeding trial.
