Induced Breeding Of The African Catfish (Clarias Gariepinus Burchell, 1822) Under Varying Brood Stock Ratios Using Ovaprim

ABSTRACT

Modern methods of producing African catfish (Clarias gariepinus) fingerlings require that the male brooder is sacrificed to obtain milt for artificial fertilization of the eggs stripped from the female under hormonal induction. The objective of this research was to study the semi artificial technique of producing catfish larvae with different brood stock ratios using Ovaprim. The experiment was made up of three (3) treatment groups and each treatment had three (3) replicates each. The treatments were T1 (artificial spawning with 1:1 female: male ratio), T2 (semi artificial spawning with 1:1 female: male ratio) and T3 (semi artificial spawning with 2:1 female: male ratio). The relative fecundity of female brooders in T1, T2 and T3 were 68 ± 6.31, 78 ± 12.29 and 65 ± 8.18 respectively and they were not significantly different (p>0.05). Percentage fertilization for T1 (81±1.52%), T2 (75 ± 2.51%) and T3 (62 ± 2.50%) were significantly different (p