Comparative Study of Ovaprim and African Catfish Pituitary Extract to Induce Breeding in the Hatchery Complex of University of Calabar, Nigeria
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Abstract
Fish is a vital source of food for people. It is the most important single source of high-quality protein providing about 16% of animal protein produced by the world population. This study examined the Hatchability, growth performance and survival rate of Clarias
gariepinus hatched with ovaprim and catfish pituitary hormone. Artificial breeding (ovaprim) and natural hormones (pituitary gland) technique were adopted for this experiment. Six pairs of brood stock (catfish) with three pairs, each for artificial and natural hormones were selected from both male and female and were subjected to different treatment with ovaprim and natural hormones. At a mean temperature of 25.7±0.81 latency period for ova prim and pituitary gland extract were 660 and 696 minutes, respectively. Workers fecundity was significantly higher (P<0.05) for brooders treated ovaprim than pituitary hormone induced spawners. Hatching rates also followed the same trend, in which significantly higher hatching success was recorded for ovaprim ovulated eggs (60%) than the pituitary hormone induced eggs (20%). Fry survival rate was (70%) for ovaprim induced fish while pituitary hormone induced fish fry had (40%), percentage mortality was significantly minimal for ovaprim treated fish. Production cost analysis revealed that, the use of pituitary produced a statistically significant gross profit and a higher profit index of N19,000.00 over ovaprim N24,000.00 although ovaprim was more productive with a good yield for the cost amount. From the study, it was concluded that ovaprim is superior hence was recommended for use by catfish breeders.
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