小刀蛏壳性状与活体质量、软体部重的相关分析

The correlation analysis of the morphological traits,the live body weight,and edible tissue weight of the Cultellus attenuatus

采用相关分析和通径分析的方法,研究小刀蛏的壳长、壳高、壳宽、铰合线长、壳顶到后缘线长5个性状之间对活体质量和软体部重影响,并分别计算了各性状间的相关系数和以表型性状为自变量对体质量和软体部重作因变量的通径系数和决定系数。结果表明,各表型性状与体质量、软体部重之间的相关系数均达到极显著水平(P<0.01)。本文中总决定系数为0.921和0.816,大于0.8,说明已找到自变量。本文分别以活体质量、软体部重为依变量,壳长X1、壳宽X2为自变量建立回归方程,为:Y_活=-24.670+4.900X_1+2.582X_2;Y_软=-8.976+2.223X1+0.956X2。

The shell length, height, width, hinge width, and the length from the head of shell to the posteri- or horder of Cultellus altenuatus were measured,their correlation coefficients were calculated. Basing on these statistics, the effect, given by the morphological traits of shell, on the live body weight and the edible tissue weight were found by the methods of path analysis and correlation analysis. The shell morphological traits were used as independent variables, and live hody weight and edible tissue weight used as a dependent variable for calculating the path coefficients and the determination coefficients. The results showed that the correlation coefficient between each shell morphological trait, the live body weight, and edible tissue weight were all highly significant（P〈0.01）. In this paper, P〉0.8（P=0.921, or P=0,816）, which shows that the main independent variable were found. Multiple regression equation were obtained hy using the live body weight （Yg） and the edible tissue weight （Yz） as dependent variable and using shell length （X1） and shell width （X2） as independent variable： Yg=-24.670＋4.900X1＋2.582X2; Yz=-8.976＋2.223X1＋0.956X2.