Genetic parameters of survival in four generations of Indian white shrimp (Fenneropeneaus indicus)

This study evaluated the genetic variance for survival at harvest of Indian white shrimp (Fenneropenaeus indicus) using a pedigreed synthetic population generated upon collecting broodstock from different fishery grounds in Egypt. The estimated heritabilities (h(2) +/- SE) of survival from generations G(0) to G(3) ranged from 0.144 +/- 0.026 to 0.008 +/- 0.030 using a model that included the common environmental effect (c(2)). Low heritability (0.014 +/- 0.015) was estimated across generations with the inclusion of common environmental effect (c(2)). However, the h(2) of survival from G(0) to G(1) ranged from 0.569 +/- 0.071 to 0.410 +/- 0.011 when c(2) was not included. The genetic correlation for survival between different ponds from G(0) to G(3) was moderate to high (0.79 +/- 0.042 to 0.83 +/- 0.012) but significantly different (P < 0.05). There were low correlation coefficients (-0.237 +/- 0.089 to 0.316 +/- 0.073) between body weight estimated breeding value (EBV) and survival EBV of families in four generations.