Effect of morphometrical traits on weight traits in one-year old yesso scallop Patinopecten yessoensis
The shell length (X1) , shell height (X2) , shell width(X3) , and live body weight ( Y) ,body-tissue weight (Z) and adductor muscle weight ( W) of 97 one -year old yesso scallop (Patinopecten yessoensis) were measured, and their correlation coefficients was calculated. The first 3 morphometrical traits were used as independent variables, and live body weight, body - tissue weight and adductor muscle weight were used as a dependent variable for path analysis, path coefficients ( Pi) , determination coefficients (di) and correlation index ( R2) were calculated. The results showed that 3 correlation coefficients between morphometrical trait and live body weight, body-tissue weight and adductor muscle weight were all very significant difference (P <0. 01). Shell length (X1) as a key effective factor had predominant direct effect and determinacy on weight traits. Shell height (X2) and shell width (X3) had slightly direct effect and significant indirect effect through shell height on weight traits, which is the secondary factor. But shell height(X2) and shell width (X3) showed very slightly direct effect on body - tissue weight and adductor muscle weight. It was inferred from the results of high correlation index that the path coefficient analysis revealled the truthful relationship between the independent variables and the dependent variable. Except the insignificant factor, the multiple regression equation obtained to estimate live body weight, body - tissue weight, and adductor muscle weight as one - year old: Y = - 16. 4103 + 3. 9683X1 + 1. 5254X2 + 2. 7990X3, Z = - 5. 5523 + 2.0535 X1, W = - 1. 5683 + 0. 5480X1.
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万方数据
维普
