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Table 3 Genetic parameters estimated for survival using a threshold model under two feeding regimes in Litopenaeus vannamei

From: Feed competition reduces heritable variation for body weight in Litopenaeus vannamei

Feeding regime Parameter
\(\sigma_{a}^{2}\) \(\sigma_{t}^{2}\) \(\sigma_{e}^{2}\) \(\sigma_{p}^{2}\) \(h_{u}^{2}\) \(h_{p}^{2}\)
Ad libitum feeding 0.18 ± 0.04 0.03 ± 0.01 1 1.20 ± 0.04 0.15 ± 0.03 0.08 ± 0.02
Restricted feeding 0.18 ± 0.04 0.09 ± 0.02 1 1.26 ± 0.05 0.14 ± 0.03 0.07 ± 0.02
  1. \(\sigma_{a}^{2}\), additive genetic variance
  2. \(\sigma_{t}^{2}\), variance of the test tank effect
  3. \(\sigma_{e}^{2}\), residual variance
  4. \(\sigma_{p}^{2}\), phenotypic variance
  5. \(h_{u}^{2}\), heritability on underlying liability scale
  6. \(h_{p}^{2}\), back-transformed heritability on observed scale
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Genetics Selection Evolution

ISSN: 1297-9686