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本文对泥鳅的生长特点进行了研究。在研究方法上,主要将所获得的样本数据,运用数理统计中回归分析;应用计算机软件,并在微机(APPLE—Ⅱ)上调式运行,对泥鳅的生长规律作了较为详细的探讨。结果说明,对泥鳅的体长、体重。纯体重的近期预测值,拟运用方程组(Ⅰ_1)估算;特别是体长估计用L_t=23.64(1-e~(-0.227(t+0.8583))的误差较小,而对泥鳅的生长状态的理论分析,运用方程组(Ⅳ_1)描述较能反映泥鳅的生长规律。泥鳅体长与鳞片长的关系为线性关系,方程式为:L=2.916+0.12835。S相关系数为:R=0.78035>r_(0.01)。泥鳅体重(W)、纯体重(W_c)与体长的关系分别为W=0.018472L~(2.6934),相关系数R=0.9396>r_(0.01);W_c=0.02009L~(2 6193),相关系数R=0.9397>r_(0.01)。依据扩充的Von Bertalanffy生长方程可求出体长生长曲线拐点,t_L=0.2434年,体重生长曲线拐点tw=5.4336年;亦为纯体重生长曲线拐点。而由变形的Von Bertalanffy生长方程,可求导出无体长生长曲线拐点,而体重生长曲线拐点tw=3.6889年,纯体要生长曲线拐点twc=3.8669年。 测试证明,同龄期的雄鳅纯体重大于雌鳅纯体重,且4龄期为泥鳅的最佳生长状态,主要是长肉。
This article studied the growth characteristics of loach. In terms of research methods, the sample data obtained mainly use the regression analysis of mathematical statistics; using computer software, and in the microcomputer (APPLE-II) up-regulation operation, made a more detailed discussion on the growth law of loach. The results show that the body length and body weight of the loach. The short-term predicted value of pure weight is to be estimated by using the equation group (I_1); in particular, the error of L_t=23.64 (1-e~(-0.227(t+0.8583)) for body length estimation is smaller, and the growth status of loach is smaller. The theoretical analysis, the use of the equation group (IV_1) description can better reflect the growth law of loach.The relationship between body length and scale length is a linear relationship, the equation is: L=2.916+0.12835.S correlation coefficient is: R=0.78035>r_ (0.01) The relationship between loach body weight (W), pure body weight (W_c) and body length were W=0.018472L~(2.6934), correlation coefficient R=0.9396>r_(0.01), and W_c=0.02009L~(2 6193). ), The correlation coefficient R = 0.9397> r_ (0.01) According to the expansion of the Von Bertalanffy growth equation can be found body length growth curve inflection point, t_L = 0.2434 years, the weight growth curve inflection point tw = 5.4336 years; also a pure weight growth curve inflection point From the deformed Von Bertalanffy growth equation, the inflection point of the body growth curve can be derived, and the inflection point of the body growth curve is tw=3.6889, and the inflection point of pure growth curve is twc=3.8669 years. The weight is greater than that of the female and the pure weight, and the 4th instar is the best growth state of the loach, mainly the long meat.