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| Correlation Analysis of Morphometric Traits on Body Weight of Spotted Maigre Nibea albi f lora at Different Growth Stages |
| HUANG Weiqing,YU Zuojian |
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Abstract The correlation analysis and path anlysis were used to study the effects of morphometric traits on body weight in spotted maigre Nibea albif lora at different stages of 2‐month‐old individuals and 18‐month‐old individuals .The results showed that the maximal variable coefficient of the body weight was observed at different stages ;especially in body length of 2‐month‐old (0 .576 ) and body height of 18‐month‐old (0 .558) .The total length and body length of 2‐month‐old (0 .4250) and body heigth(0 .3114)of the 18‐month‐old fish were the major trait correlated with the body weight .Through stepwise regression analysis method and partial regression coefficient significance test ,we established the quality as the de‐pendent variable .The optimal linear regression equation of 2‐month‐old spotted maigre :y= -0 .964+0 .724 x4 +0 .289 x1 (r2 =0 .957);the optimal linear regression equation of 18‐month‐old spotted maigre :y=-600 .412+54 .162x7 +18 .03x1 (r2 =0 .943);in the two stage select breeding of spotted maigre ,we can focus on body length and body height traits in selective breeding ,and indirect selective breeding of the body quality ,to ensure the effect of selective breeding .
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Received: 25 May 2016
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