Table 2. Intestinal indices of fish fed on various supplementation ratios in diet of peptidoglycan after a 4-week trial
| Variables | Experimental treatments |
| PL0 | PL2.5 | PL5 | PL10 |
| VSI (%) | 7.0 ± 1.6 | 7.2 ± 1.5 | 7.6 ± 1.2 | 7.0 ± 0.7 |
| HSI (%) | 2.4 ± 0.4 | 2.6 ± 0.7 | 2.6 ± 0.3 | 2.4 ± 0.3 |
| GaSI (%) | 2.6 ± 0.6 | 3.0 ± 0.7 | 3.0 ± 0.8 | 3.0 ± 0.9 |
| Relative gut length (%) | 106.6 ± 25.2 | 129.8 ± 43.8 | 143.8 ± 14.9 | 134.2 ± 19.8 |
PL0, PL2.5, PL5, PL10: commercial feed supplemented with peptidoglycan at 0, 2.5, 5, and 10 g/kg. VSI: visceral somatic index, HSI: Hepatic somatic index, GaSI: Gastro-somatic index. The data was represented by mean ± SD. Values with the different letters denote the significant difference (p < 0.05).