论文部分内容阅读
随机选取1176尾浅色黄姑鱼其中有600尾雌性和576尾雄性研究其形态性状对其体重的影响,测定性状包括其体长(X1)、躯干长(X2)、尾长(X3)、头长(X4)、体高(X5)、最大体周(X6)、体重(Y)。利用相关分析方法计算各性状间的相关系数,并通过通径分析方法计算其以体重为依变量各形态性状为自变量的通经系数和决定系数。结果表明:雌雄性浅色黄姑鱼各形态性状与体重之间相关性均达到极显著水平(P<0.01);雌性浅色黄姑鱼中各形态性状中体长、最大体周、体高、尾长、躯干长的通径系数达到极显著水平(P<0.01),而雄性浅色黄姑鱼各形态性状中体长、最大体周、头长、尾长、躯干长的通径系数达到极显著水平(P<0.01);决定系数分析结果表明雌性浅色黄姑鱼的体长和最大体周对其体重的决定程度最大;而雄性浅色黄姑鱼最大体周和躯干长对其体重的决定程度最大。经多元回归分析去除偏回归系数不显著的性状,建立多元回归方程。
The effects of morphological traits on the body weight of 1176 light yellow croaker (600 yellow-females and 576 male) were randomly selected and their traits including body length (X1), trunk length (X2), tail length (X3) Head length (X4), height (X5), the maximum body circumference (X6), weight (Y). Correlation coefficient of each trait was calculated by correlation analysis, and the pass coefficient and decision coefficient of each morphological trait as independent variable were calculated by the path analysis method. The results showed that there was a significant correlation between the morphological traits and body weight of female and male yellow croaker (P <0.01). The body length, body length, body height, (P <0.01). However, the path length of body length, maximum body circumference, head length, tail length and trunk length reached the maximum (P <0.01). The results of coefficient of determination showed that the body length and the maximum body length of female Pseudosciaena crocodilus had the highest degree of body weight determination. However, the maximum body length and trunk length The greatest weight decision. Multiple regression analysis was used to remove the non-significant coefficients of partial regression coefficients and establish multiple regression equations.