Cottonseed Meal Protein Hydrolysate Improves the Growth Performance of Chinese Mitten Crab (Eriocheir sinensis) by Promoting the Muscle Growth and Molting Performance

Table 5

Effects of dietary cottonseed meal protein hydrolysate levels on the muscle composition (%, wet weight) of E. sinensis.

Group	CPH0	CPH0.2	CPH0.4	CPH0.8	CPH1.6	CPH3.2	Polynomial contrasts
							Linear	Quadratic
Moisture (%)	79.42 ± 0.03^ab	79.56 ± 0.21^a	79.27 ± 0.10^ab	78.98 ± 0.11^ab	78.51 ± 0.39^bc	77.94 ± 0.14^c	0.00	0.00
Crude protein (%)	16.58 ± 0.17^c	16.49 ± 0.14^c	16.72 ± 0.09^c	16.94 ± 0.11^bc	17.51 ± 0.20^ab	17.71 ± 0.07^a	0.00	0.00
Crude lipid (%)	1.25 ± 0.03	1.25 ± 0.01	1.29 ± 0.03	1.24 ± 0.05	1.27 ± 0.01	1.26 ± 0.01	ns	ns
Crude ash (%)	1.52 ± 0.01	1.44 ± 0.04	1.50 ± 0.02	1.46 ± 0.01	1.51 ± 0.04	1.45 ± 0.03	ns	ns

Values are means ± SEM of four replicates. Means in the same row with different superscript letters are significantly different (). ns, not significant. CPH, cottonseed meal protein hydrolysate; CPH0 to CPH3.2, dietary cotton meal replacement by 0%, 0.2%, 0.4%, 0.8%, 1.6%, and 3.2% of CPH; SEM, standard error of mean.