Diets Parameters PBM0 PBM50 PBM75 PBM100 Initial average weight (g fish-1) 1.5 ± 0.05 1.6 ± 0.06 1.6 ± 0.05 1.5 ± 0.06 Final average weight (g fish-1) 54.6 ± 2.5 53.8 ± 1.8 54.1 ± 2.0 54.3 ± 1.5 Gain in weight (g fish-1) 53.1a ± 1.1 52.2a ± 1.4 52.5 a ± 1.5 52.8a ± 1.6 Average daily gain (g fish day-1) 0.44 ± 0.15 0.43 ± 0.2 0.43 ± 0.3 0.44 ± 0.1 Specific growth rate (% day-1)1 3.0 ± 0.5 2.92 ± 0.4 2.93 ± 0.2 2.99 ± 0.3 Feed consumed (g fish-1) 70.0 ± 3.0 71.0 ± 2.0 71.0 ± 4.0 71.0 ± 3.0 Feed conversion ratio2 1.31 ± 0.15 1.36 ± 0.2 1.35 ± 0.2 1.34 ± 0.1 Protein efficiency ratio3 2.51 ± 0.2 2.44 ± 0.15 2.45 ± 0.18 2.46 ± 0.16 Net Protein Utilization (NPU%) 4 39.75 ± 4.0 37.10 ± 3.0 37.98 ± 3.0 38.51 ± 4.0

Values are the mean ± S.E. of triplicate groups of each treatment. 1Specific growth rate = 100 × (Ln final weight- Ln initial weight)/ 120 day. 2Feed conversion= (feed given per fish)/ (weight gain per fish). 3Protein efficiency ratio = (weight gain per fish)/ (protein intake per fish). 4Net protein utilization (%) = (final body protein - initial body protein)/(protein intake) ×100.

Table 5: Growth performance of Nile tilapia fed the experimental diets.