魚類の成長構造解析に関する研究-1-コイの最大成長

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Usually animal growth is considered in terms of the difference between assimilation and dissimilation of body substances. Both metabolism and catabolism are assumed to be in proportion to surface and weight of body respectively. In the present paper, the total loss of energy is represented by gross efficiency of conversion, i.e. gain of body weight is given by a product of food intake and gross efficiency. Experiment carp were reared with sufficient food supply of Limnodrilus at 25±1°C. The amount of food intake and gain of body weight during certain periods were mersured. The results obtained are as follows. 1. The amount of food intake (r) and gross efficiency of conversion (C) in relation to body weight (W) are given by the following equations. r=KrW2/3, Cr=Kc/W0.07 2. Therefore maximum growth may be expressed by dW/dt=r•Cr=Kr•Kc•W3/5, W={2/5(Kr•Kc•t+5/2W02/5)}5/2. Substituting Kr=1.094, Kc=0.331 and W0=0 into this equation, we have W=7.93×10-3•t5/2•(24-30°C). for the maximum growth of carp. Consideringtemperature(T), we have W=(2/5Kr'•Kc•t)5/2 e0.258r•(16-23°C). 3. These equations are applicable for carp weighing 1 to 1000g when food intake is sufficient.
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