Table 2.
Proximate composition (%, dry matter basis) of PBM, FPBM, and the experimental diets (%) used to fed Nile tilapia with varied levels of FPBM for 60 days.
| Item | PBM | FPBM | FPBM (%) | Requirementsb | ||||
|---|---|---|---|---|---|---|---|---|
| 0 | 10 | 20 | 30 | 40 | ||||
| Crude protein | 60.2 | 65 | 31.38 | 31.32 | 31.54 | 31.76 | 31.88 | |
| Ether extract | 7.9 | 8.1 | 6.04 | 6.3 | 6.46 | 6.55 | 6.54 | |
| Ash | 10.6 | 4.6 | 7.23 | 7.45 | 7.65 | 7.16 | 7.21 | |
| Gross energy (kcal/g)a | 470.68 | 508.73 | 445 | 451 | 449 | 448 | 446 | |
| Essential amino acid | ||||||||
| Arginine | 6.6 | 6.9 | 2.72 | 2.63 | 2.67 | 2.65 | 2.63 | 1.18 |
| Histidine | 1.8 | 2.1 | 1.12 | 0.96 | 0.95 | 0.89 | 0.88 | 0.48 |
| Isoleucine | 3.9 | 4.2 | 1.32 | 1.32 | 1.21 | 1.18 | 1.13 | 0.78 |
| Leucine | 7 | 7.3 | 2.04 | 2.02 | 2.14 | 2.31 | 2.43 | 0.95 |
| Lysine | 4.2 | 4.7 | 2.48 | 2.33 | 2.26 | 2.25 | 2.31 | 1.43 |
| Methionine | 1.22 | 1.7 | 1.41 | 1.25 | 1.18 | 1.21 | 1.23 | 0.75 |
| Phenylalanine | 3.7 | 4.2 | 0.95 | 0.93 | 0.89 | 0.91 | 0.89 | 1.05 |
| Threonine | 3.65 | 4.2 | 2.28 | 2.11 | 2.08 | 2.21 | 2.12 | 1.05 |
| Tryptophan | 0.7 | 1 | 1.01 | 0.95 | 0.93 | 0.94 | 0.92 | 0.28 |
| Valine | 5.22 | 5.7 | 0.96 | 0.92 | 0.89 | 0.82 | 0.85 | 0.78 |
a
Gross energy was calculated as 5.65, 9.45, and 4.11 kcal per g for protein, lipid, and carbohydrates, respectively.
b
Nile tilapia requirements based on the recommendations of National Research Council (27).