Comparisons of Growth and Survival Performance Among Selected Families and Wild Populations of Fenneropenaeus chinensis

In this study,families of selected population for growth(SPBWT),selected population for white spot syndrome virus(WSSV)resistance(SPRW),Bohai wild population(WPBH)and Huanghai wild population(WPHH)of F.chinensis were constructed through artificial insemination and with the standardized procedure of larvae rearing.Growth and survival performance were studied among four populations after a 70 days common test.The results showed that the maximum least square mean of body weight was 17.50 g in SPBWT while the minimum was 13.03 g in WPHH.Compared with WPBH,body weight of SPBWT increased by 23.41%(P<0.01)and that of SPRW by 12.20%(P>0.05).Body weights of SPBWT and SPRW were significantly higher than that of WPHH,which increased by 34.31%(P<0.01)and 22.10%(P<0.05),respectively.The mean AGR of four populations was 0.19,0.18,0.17 and 0.16 g d-1,respectively.Coefficient of variation of body weight among four populations was high,which ranged from 32.67% to 35.25%.Such a range showed that there was the potentiality for further improvement in selected populations.Coefficient of variation of survival rate among four populations was low,varying between 3.20% and 5.90%.The difference of survival was highly significant(P<0.01)between SPBWT and WPBH,and significant(P<0.05)between SPRW and WPBH.However,no significant difference among other populations(P>0.05)was observed.Different growth performances were also observed among different families in each population.The body weight of 798F family was the highest.The absolute growth rate(AGR)was 0.25 g d-1,150%higher than that of the lowest one,0.1 g d-1in 807F family.Survival rate of families among four populations was different.The highest was 94.74%,and the lowest was 71.88%.