Dietary L-arginine supplementation reduces lipid accretion by regulating fatty acid metabolism in Nile tilapia (Oreochromis niloticus)

Table 1 Effects of dietary supplementation with 1% Arg, or 2% Arg for 56 days on growth performance and organ index of tilapia¹

Items	Control	1%Arg	2%Arg	P-value
Initial body weight, g	2.33 ± 0.02	2.35 ± 0.04	2.36 ± 0.03	0.691
Final body weight, g	67.47 ± 4.53	68.64 ± 3.56	68.27 ± 4.19	0.979
Weight gain, g	65.15 ± 2.83	66.02 ± 3.00	66.43 ± 2.48	0.957
Specific growth rate, %/d	5.96 ± 0.08	5.99 ± 0.07	5.99 ± 0.06	0.970
Feed conversion ratio	0.85 ± 0.05	0.86 ± 0.05	0.87 ± 0.06	0.985
Feed intake, % of body weight/d	2.83 ± 0.17	2.87 ± 0.17	2.88 ± 0.19	0.979
Body condition factor, g/cm³ of body length	3.52 ± 0.03^a	3.33 ± 0.01^b	3.29 ± 0.02^b	0.000
Liver index, %	1.90 ± 0.07^a	1.61 ± 0.26^b	1.28 ± 0.23^c	0.000
Spleen index, %	0.30 ± 0.02^c	0.45 ± 0.03^b	0.68 ± 0.03^a	0.000
Intraperitoneal fat index, %	2.03 ± 0.11^a	1.78 ± 0.18^ab	1.45 ± 0.06^b	0.041

¹Values are means ± SEM, n = 3 tanks per group. Means without a common letter differ, P < 0.05. Body condition factor = body weight (g) × 100 / body length³ (cm); Feed conversion ratio = amount of feed intake (g) / weight gain (g); Feed intake = 100 × total amount of the feed consumed (g) / [(initial body weight (g) + final body weight (g)) / 2]/ days; Organ index = organ weight (g) × 100 / body weight (g); Specific growth rate = (Ln final weight (g) – Ln initial weight (g)) × 100 / days; Weight gain = final weight (g) – initial weight (g)

ISSN: 2049-1891