A long‐term feeding trials were conducted to evaluate the effect substituting dietary fishmeal with a mixture of plant and animal protein sources on growth, body composition and economic efficiency of young Korean rockfish (Sebastes schlegeli). A fishmeal‐based diet was designated the control (Con). Three among the other six diets, respectively, had 30%, 40% and 50% of its fishmeal replaced by a mixture of plant and animal protein sources (designated as FS30, FS40 and FS50 respectively), while the remaining three diets were FS30, FS40 and FS50 diets supplemented with L‐lysine and L‐methionine (FS30AA, FS40AA and FS50AA respectively). Three replicated groups of fish (initial body weight, 86 ± 1.9 g) were fed one of the seven diets for 30 weeks. By the end of the feeding trials, the survival rate of all experimental groups was over 92%. The final mean weight, weight gain, feed efficiency, protein efficiency ratio and condition factor of fish were not significantly affected by dietary treatments. Incidence cost of FS50 diet was significantly lower than Con diet. FS50 and FS40AA diets exhibited significantly higher profit index than the Con diet. FS40AA and FS50 diets were the best economically, followed by FS40, FS50AA, FS30, FS30AA and Con diets. These results suggest that the dietary fishmeal could be substituted with a mixture of plant and animal protein up to 50% in the diet without a reduction in growth and feed utilization of young Korean rockfish. Taking account of economic efficiency, the FS50 diet is recommendable for young Korean rockfish farming.

中文翻译：

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长期饮食中在配方饮食中用替代蛋白质来源的混合物替代鱼粉对鱼苗的生长性能，身体成分和经济效率的影响（Sebastes schlegeli）

进行了一项长期饲喂试验，以评估日粮中添加动植物蛋白混合物对韩国石斑鱼的生长，身体成分和经济效率的影响（Sebastes schlegeli））。以鱼粉为基础的饮食被指定为对照（Con）。在其他六种饮食中，有三种分别将其鱼粉的30％，40％和50％替换为植物和动物蛋白源的混合物（分别命名为FS30，FS40和FS50），而其余三种饮食为FS30，补充L-赖氨酸和L-蛋氨酸的FS40和FS50饮食（分别为FS30AA，FS40AA和FS50AA）。将三组重复的鱼（初始体重86±1.9克）喂食七种饮食之一，持续30周。到喂养试验结束时，所有实验组的存活率均超过92％。鱼类的最终平均体重，增重，饲料效率，蛋白质利用率和条件因子均不受饮食处理的显着影响。FS50饮食的发生成本显着低于Con饮食。FS50和FS40AA日粮的利润指数显着高于Con日粮。FS40AA和FS50饮食在经济上是最好的，其次是FS40，FS50AA，FS30，FS30AA和Con饮食。这些结果表明，膳食中的鱼粉可以用日粮中高达50％的动植物蛋白混合物代替，而不会降低幼小石斑鱼的生长和饲料利用率。考虑到经济效益，FS50饮食推荐用于年轻的韩国石鱼养殖。这些结果表明，膳食中的鱼粉可以用日粮中高达50％的动植物蛋白混合物代替，而不会降低幼小石斑鱼的生长和饲料利用率。考虑到经济效益，FS50饮食推荐用于年轻的韩国石鱼养殖。这些结果表明，膳食中的鱼粉可以用日粮中高达50％的动植物蛋白混合物代替，而不会降低幼小石斑鱼的生长和饲料利用率。考虑到经济效益，FS50饮食推荐用于年轻的韩国石鱼养殖。