Table 1.
Breeding characteristics and triploidization percentage of C. gariepinus eggs exposed to the different protocols of electric shock.
| Treatment | Shock duration (min) | Fertilization rate (%) | Hatching rate (%) | Survival rate (%) | Triploidy rate (%) |
|---|---|---|---|---|---|
| 9 V | 3 | 96.10 ± 0.73 | 60.80 ± 3.77b | 96.70 ± 0.16a | 30.90 ± 0.17d |
| 9 V | 5 | 94.20 ± 0.21 | 60.90 ± 2.08b | 98.40 ± 0.16a | 30.43 ± 1.12d |
| 9 V | 10 | 94.10 ± 0.24 | 41.40 ± 1.44e | 97.60 ± 0.07a | 20.63 ± 0.95e |
| 12 V | 3 | 98.40 ± 0.11 | 58.20 ± 2.08c | 97.30 ± 0.30a | 10.43 ± 1.07 f |
| 12 V | 5 | 95.20 ± 0.24 | 53.60 ± 1.24d | 96.40 ± 1.07a | 20.63 ± 0.90e |
| 12 V | 10 | 96.34 ± 0.14 | 56.40 ± 0.09 cd | 95.10 ± 0.31a | 50.63 ± 0.25c |
| 21 V | 3 | 95.20 ± 0.40 | 27.20 ± 0.12 f | 95.40 ± 2.11a | 70.63 ± 0.15b |
| 21 V | 5 | 96.15 ± 0.13 | 21.10 ± 2.08 g | 94.10 ± 1.76a | 85.43 ± 0.17a |
| 21 V | 10 | 97.30 ± 0.44 | 1.70 ± 1.44 h | 70.00 ± 1.07b | * |
| + ve Control | — | 95.20 ± 0.02 | 65.50 ± 0.00a | 96.9 ± 0.11a | 00.00 ± 0.00 g |
| − ve Control | — | 95.51 ± 0.04 | 63.90 ± 0.00a | 94.20 ± 0.08a | 00.00 ± 0.00 g |
Numbers are means ± standard errors. *Unable to assess triploidy percentage due to poor hatching and insufficient sample size (n = 2) after two weeks of culture post-hatching. Mean in the same row with different superscripts differ significantly (Anova, P ≤ 0.05).