Abstract:We investigated the effects of family selection on the growth rates of four genetic lines of Litopenaeus vannamei, the Pacific white shrimp, from Venezuela. The mean family weight at selection was 16.79 g and the mean growth rate was 0.169 g d -1 at a mean age of 138 days. The mean growth rates per generation were 0.141 g d -1 for the parental generation (P 0 ), 0.173 g d -1 for the F 1 and 0.191 g d -1 for the F 2 . Survival varied from 83.3% to 94.4%. There were statistically significant differences between … Show more
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