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养鱼饵料一般含蛋白质40%左右,这比家畜饲料的蛋白质含量显著地高。因此,一般认为鱼类比家畜对蛋白质的需要量高。可是,蛋白质需要量的本来意义是指构成鱼体蛋白质最大积累所必需的蛋白质摄取量,以平均单位体重或单位体表面积每日需要量来表示。对满足需要量所必需的饵料蛋白质含量(适量或最适含量)是随着摄饵量和饵料可消化能含量等而变化的。因为鱼类那样的变温动物的摄饵量随着环境条件而变化,所以若把饵料的蛋白质含
Fish food generally contains about 40% protein, which is significantly higher than the protein content of livestock feed. Therefore, it is generally considered that fish have higher protein requirements than livestock. However, the original meaning of the protein requirement refers to the amount of protein that is necessary for the maximum accumulation of protein in the fish, expressed as the average unit body weight or daily requirement per unit body surface area. The amount of food protein (proper amount or optimum amount) necessary for satisfying the requirement varies with the amount of bait and the digestible energy content of the bait. Since the amount of bait consumed by warm-blooded animals such as fish varies depending on environmental conditions, if the protein content of the bait