Table 5.
The effect of different dietary protein sources and carbon sources on Nile tilapia (O. niloticus) nutrient digestibility.
| Experimental Groups |
DM% | CP% | EE% | NFE% | Ash% |
|---|---|---|---|---|---|
| Protein source | |||||
| Plant protein. | 80.19 b | 88.44 b | 93.10 | 72.54 | 35.85 b |
| Fish protein. | 81.00 a | 91.93 a | 93.19 | 72.54 | 41.99 a |
| Carbon source | |||||
| Control (C) | 78.48 c | 87.98 c | 92.35 b | 72.47 | 37.67 b |
| B-GLY | 81.05 b | 90.98 b | 93.56 a | 72.47 | 39.65 a |
| B-MOS | 82.26 a | 91.59 a | 93.52 a | 72.71 | 39.44 a |
| Interaction protein source × carbon source | |||||
| C-plant protein | 77.46 d | 85.45 e | 92.51 c | 72.40 | 34.50 e |
| C-fish protein | 79.51 c | 90.52 c | 92.20 c | 72.53 | 40.83 c |
| B-GLY plant protein | 81.01 b | 89.51 d | 93.46 a,b | 72.56 | 36.54 d |
| B-GLY fish protein | 81.09 b | 92.45 b | 93.65 a,b | 72.56 | 42.77 a |
| B-MOS plant protein | 82.11 a | 90.36 c | 93.32 b | 72.66 | 36.52 d |
| B-MOS fish protein | 82.40 a | 92.81 a | 93.72 a | 72.74 | 42.36 b |
| p-value | |||||
| Protein source | <0.001 | <0.001 | 0.354 | 0.973 | <0.001 |
| Carbon source | <0.001 | <0.001 | <0.001 | 0.355 | <0.001 |
| Interaction | <0.001 | <0.001 | <0.001 | 0.705 | <0.001 |
| RSD | 0.44 | 0.26 | 0.27 | 0.42 | 0.28 |
DM: dry matter; CP: crude protein; EE: ether extract; NFE: nitrogen free extract; Ash: mineral content; RSD: residual standard deviation. a–e Means with different superscripts in the same column are significantly different (p < 0.05).