Effects of Dietary Protein-to-Energy Ratios on Growth, Immune Response, Antioxidative Capacity, Liver and Intestinal Histology, and Growth-Related Gene Expression in Hybrid Yellow Catfish (Pelteobagrus fulvidraco × Pelteobagrus vachelli )

Table 3

Growth performance and feed utilization of hybrid yellow catfish fed different dietary P/E ratios for 7 weeks.

P/E ratio mg/kcal	IBW (g)^1	FBW (g)^2	WG (%)^3	SGR^4	FCR^5	DFI^6	PER^7	PPV^8	Survival %
84		^a	^a	^ab	^bc	^ab	^bc	^ab	100
88		^ab	^ab	^abc	^bc	^abc	^bcd	^bc	100
90		^abc	^abc	^bcd	^bc	^abc	^bc	^ab	100
93		^bc	^bc	^cd	^ab	^bc	^cd	^cd	98
95		^c	^c	^d	^a	^a	^d	^d	100
96		^ab	^ab	^abc	^cd	^c	^bc	^b	100
99		^ab	^ab	^abc	^bc	^abc	^ab	^b	100
103		^a	^a	^a	^d	^c	^a	3^a	100

Values are of three replications. Values in the same line with superscripts are significantly different (). IBW¹: initial body weight; FBW²: final body weight; WG (%)³:weight gain; SGR⁴: specific growth rate, % day^-1; FCR⁵: feed conversion ratio; DFI⁶:daily feed intake; PER⁷: protein efficiency ratio; PPV⁸: protein productive value.