Effects of three morphological traits on body weight of 1-month-old juvenile Micropterus salmoides
In order to explore the effects of main morphological traits on body weight of juvenile largemouth bass(Micropterus salmoides),the correlation analysis,path analysis and stepwise regression analysis were carried out on the body weight and three main morphological traits of 150 one-month-old juvenile largemouth bass.The results showed that the correlation coefficients between body weight and total length,body height and body width of juvenile largemouth bass were 0.724,0.714 and 0.626,respectively,and all reached extremely significant levels(P＜0.01).Path analysis showed that the path coefficients of the three morphological traits on body weight reached extremely significant levels(P＜0.01),and the direct effect of total length on body weight was the largest(path co-efficient was 0.542),followed by body height and body width.The total coefficient of determination of the three morphological traits on body weight was 0.820,indicating that body weight was mainly affected by these three traits.Multivariate regression analysis established a multiple regression equation Y=1.238+0.091X1+0.225X2+0.130X3 with the converted weight as the dependent variable(Y),full length(X1),body height(X2)and body width(X3)as independent variables.In summary,when the body weight of 1-month-old juvenile largemouth bass is the main target for parental breeding,the full length should be the main selection trait,and the body height and body width should be the auxiliary selection traits.
NETL
NSTL
万方数据
