Table 4. Growth performance and feed utilization of spotted scat fed difference dietary protein level for 60 days

	Protein treatments
	CP30	CP34	CP38	CP42
L_b (cm)	3.56 ± 0.32	3.56 ± 0.32	3.56 ± 0.32	3.56 ± 0.32
L_f (cm)	5.27 ± 0.14^a	5.38 ± 0.20^a	5.63 ± 0.20^b	5.68 ± 0.20^b
SGR_L (%/day)	0.65 ± 0.03^a	0.69 ± 0.03^b	0.76 ± 0.03^c	0.78 ± 0.03^c
W_b (g)	2.94 ± 0.31	2.94 ± 0.31	2.94 ± 0.31	2.94 ± 0.31
W_f (g)	6.41 ± 0.39^a	6.82 ± 0.42^b	7.41 ± 0.17^c	7.44 ± 0.32^c
SGR_W (%/day)	1.30 ± 0.26^b	1.40 ± 0.26^ab	1.54 ± 0.26^a	1.56 ± 0.26^a
SR (%)	97.8 ± 0.46^a	96.7 ± 0.52^a	97.8 ± 0.65^a	95.6 ± 0.47^a
FCR	2.11 ± 0.02^a	1.78 ± 0.02^b	1.55 ± 0.01^c	1.52 ± 0.03^c
PER	1.58 ± 0.01^a	1.65 ± 0.02^b	1.70 ± 0.02^c	1.57 ± 0.01^a
NPU	11.68 ± 0.70^a	15.75 ± 0.96^b	18.46 ± 0.41^c	19.08 ± 0.81^c

Growth performance: Mean ± SE (n = 30); feed utilization: Mean ± SD (n = 3).
Values within a row having the same superscript are not significantly different at p > 0.05.
CP, crude protein; Lb and Wb, the length and weight of fish at the beginning; Lf and Wf, the length and weight of fish at the finish the experiment; SGRL (%/day) or SGRW (%/day) are the specific growth rate of fish in length or weight; SR (%), survival rate; FCR, feed conversion ratio; PER, protein efficiency rate; NPU, Net Protein Utilization.