Genetic assessment of residual feed intake as a feed efficiency trait in the Pacific white shrimp Litopenaeus vannamei

Table 2 Posterior means and 95% high posterior density intervals of variance components and heritabilities for average daily gain, daily feed intake, feed efficiency ratio and residual feed intake during the two growth periods

Period	Trait	Variance component			Heritability
Period	Trait	σ ²_a	σ ²_e	σ ²_p	Mean ± SD	HPD
Days 1–21	ADG	6.52E−04	3.69E−04	1.02E−03	0.638 ± 0.242	0.390–0.903
	DFI	1.24E− 3	5.43E−04	1.78E−03	0.696 ± 0.239	0.410–0.899
	FER	7.62E−03	5.59E−03	1.32E−02	0.577 ± 0.232	0.345–0.882
	RFI	1.55E−04	8.72E−05	2.43E−04	0.641 ± 0.237	0.392–0.905
Days 22–42	ADG	7.34E−04	4.94E−04	1.23E−03	0.598 ± 0.255	0.363–0.928
	DFI	9.16E−04	4.63E−04	1.38E−03	0.664 ± 0.247	0.361–0.960
	FER	1.65E−02	7.49E−03	2.40E−02	0.688 ± 0.253	0.429–0.937
	RFI	3.38E−04	1.41E−04	4.79E−04	0.707 ± 0.252	0.460–0.945

ADG average daily gain (g/day), DFI daily feed intake (g/day), FER feed efficiency ratio (g/g), RFI residual feed intake (g/day), SD standard deviation, HPD high posterior density interval at the 95% level

ISSN: 1297-9686