The Optimum Dietary Phenylalanine Requirement of Hybrid Grouper (Epinephelusfuscoguttatus ♀ × Epinepheluslanceolatus ♂) Juveniles: Effects on Growth Performance, Gut Micromorphology, and Antioxidation

Table 4

Body condition indices; whole-body and white muscle compositions (fresh-weight basis, g/kg) of hybrid grouper juveniles fed different dietary Phe levels for 8 weeks.

Dietary Phe levels (g/kg)	Body condition indices			Whole-body composition^a			White muscle composition
	HSI	IPF	CF	Moisture	CP	CL	Moisture	CP	CL
8.2	44	14.4	26.5	754.9	146	42.6	776	190.9	10
9.2	41.9	14.7	30.7	743.1	149.2	47.7	766.1	196	13.7
10.1	36.7	13.8	28.6	744.9	153	54.2	763.6	197.5	16.8
11.2	38.8	13.7	26.5	740.7	149.8	52.5	762	196.1	16.3
13.3	30.9	12.4	27.7	748.2	150	49.9	759.7	197.7	15.6
15.2	36.3	13.5	27.5	740.1	148.7	49.8	760.4	193.8	15.2
17.3	42.2	13.8	26.7	745.9	145.7	48.2	776.1	189.9	14.4
PSE	1.60	0.39	0.99	0.15	0.07	0.10	0.22	0.50	0.05
Regression (N = 9)
SOP
Adj. R^2	0.499	0.244	−0.046	0.181	0.322	0.326	0.411	0.301	0.536
P-Value	0.001	0.031	0.583	0.166	0.030	0.029	0.009	0.040	0.001

^aInitial whole-body composition (g/kg): moisture = 766.5; CP = 147.6; CL = 31.4; HSI, hepatosomatic index; IPF, intraperitoneal fat ratio; CF, condition factor.