Table 3. Growth performance, feed utilization and liver IGF-I mRNA expression of red seabream fed the four experimental diets for 15 weeks.

	Experimental diets
	HFM	LFM	KM	SH
FBW (g)	65 ± 2.55b	52.9 ± 1.68c	63.2 ± 3.51b	76.3 ± 4.79a
WG1) (%)	666 ± 29.4ab	520 ± 15.6c	649 ± 47.9ab	810 ± 60.7a
FI2)	91.3 ± 3.94	93.1 ± 0.91	97.6 ± 5.48	95.1 ± 6.46
FCR3)	1.60 ± 0.08bc	2.01 ± 0.05a	1.74 ± 0.14b	1.51 ± 0.05c
PER4)	1.33 ± 0.07ab	1.06 ± 0.03c	1.19 ± 0.09b	1.39 ± 0.05a
SGR5) (%)	1.94 ± 0.04b	1.74 ± 0.02c	1.92 ± 0.06b	2.10 ± 0.06a
IGF-I6)	1.00 ± 0.00a	0.30 ± 0.05c	0.82 ± 0.07b	1.12 ± 0.07a
Survival (%)	90.0 ± 5.77	84.4 ± 1.92	84.4 ± 5.09	90.0 ± 3.33

Values are mean of triplicate groups and presented as mean ± SD.
Values with different superscripts in the same row are significantly different (p < 0.05).
The lack of superscript letter indicates no significant differences among treatments.
Weight gain = [(final body weight – initial body weight)/ initial body weight] × 100.
Feed intake (g/fish) = dry feed consumed (g) / fish.
Feed conversion ratio = dry feed fed/wet weight gain.
Protein efficiency ratio = fish weight gain (g) / protein.
Specific growth rate = ln (final weight in grams) – ln (initial weight in grams) × 100.
Liver insulin-like growth factors I (relative expression of mRNA).
HFM, high fish meal; LFM, low fish meal; KM, krill meal; SH, shrimp hydrolysate; FBW, final body weight.