Abstract
Thirty-three broodstock of common carp (Cyprinus carpio) obtained from Panyam Fish Farm, plateau state Nigeria was used to evaluate the percentage hatchability of carp through induced natural spawning in outdoor Hapa net system, and induced breeding by stripping in indoor concrete Ponds. Spawning and fertilization was natural for experimental group 1. Ovaprim hormone was used to induce broodstock in experimental group 2 and 3, but unlike experimental group 3, experimental group 2 was not stripped manually, as the induced female broodstock shed her eggs naturally. At the end of the experiment, the mean number of eggs in one gram was found to be (733.33±3.53a) in treatment 3, as compared to that of experimental group 2 (702.00±3.21b) and experimental group 1 (709.33±4.91b), with a significant difference at (P<0.05). There was no significant difference (P<0.05) in fecundity (x103) from the three experimental groups. Percentage fertilization was highest in experimental group 2 (94.44±0.40a). Percentage Hatchability was highest in experimental group 3 (94.10±0.85a). Number of post fry in one liter of water at day seven after hatching was found to be highest in experimental group 3 (1896.30±53.40a). In conclusion, the best method of carp propagation for aquaculture is the synchronized propagation through stripping in indoor concrete ponds, which had 94% hatching rate.
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