Skip to main content

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