Table 5.
Immune responses of Nile tilapia fed FPBM diets for 60 days*.
| Item | FPBM (%) | P value | ||||
|---|---|---|---|---|---|---|
| 0 | 10 | 20 | 30 | 40 | ||
| Lysozyme activity (unit/ml) | 30.5 ± 0.75bc | 33.0 ± 1.03c | 31.1 ± 0.55bc | 28.8 ± 0.59ab | 26.8 ± 0.88a | 0.03 |
| Phagocytic activity (%) | 51.9 ± 0.95b | 60.2 ± 2.59c | 53.5 ± 0.94b | 47.6 ± 0.60b | 39.5 ± 1.25a | 0.005 |
| Phagocytic index | 2.12 ± 0.05a | 2.60 ± 0.03c | 2.52 ± 0.05c | 2.33 ± 0.06b | 2.12 ± 0.05a | 0.032 |
| IgM (mg/dl) | 4.03 ± 0.03ab | 4.60 ± 0.12b | 4.50 ± 0.12b | 3.63 ± 0.19a | 3.30 ± 0.25a | 0.021 |
| Blood total protein (g/dl) | 3.90 ± 0.06 | 4.03 ± 0.03 | 4.07 ± 0.07 | 3.93 ± 0.07 | 3.90 ± 0.06 | 0.06 |
| NBT (OD at 630 nm) | 0.23 ± 0.01ab | 0.26 ± 0.01b | 0.24 ± 0.01ab | 0.22 ± 0.01a | 0.21 ± 0.01a | 0.042 |
| Bactericidal activity (%) | 42.6 ± 0.36b | 45.3 ± 0.62b | 43.1 ± 0.64b | 41.7 ± 0.60b | 29.6 ± 2.71a | 0.035 |
*
Values expressed as means ± SE (n = 3). Different superscript letters indicate significant differences for each pairwise comparison between treatments.