Relationship of Growth Traits Among Three Cultured Populations of Whiteleg Shrimp（ Liptopenaeus Vannamei）

Key words: 
• Liptopenaeus vannamei /
• growth trait /
• correlation analysis /
• path analysis

Abstract: Shrimps of the first generation of 3 populations of whiteleg shrimp（ Liptopenaeus vannameii） were used to determine 6 growth traits,i. e.,total length,body length,carapace length,carapace width,carapace height and body weight for analysis of the correlativity of these growth traits among the 3 populations of whiteleg shrimp by using the correlation analysis method,and the effect of the 4 morphological traits,i. e.,total length,body length,carapace length and carapace height on the quality of the shrimps was analyzed by using the path analysis method. Each population showed highly significant difference in 6 growth traits with the lowest and highest correlation the coefficient of 0.82 and 0.99,respectively. Both populations YH1 and WY1 had the highest direct effect of the total length of the shrimps on the body weight while the population SIS1 had the highest direct effect of the body length on the body weight. However,each population had similar effect of total length and body length on body weight. Both populations YH1 and SIS1 had similar determination coefficients of the 4 morphological traits on body weight,0.873 5 and 0.871 5,respectively,which were obviously higher than the determination coefficients of population WY1（ 0.760 8）.