SPAWNING PERFORMANCE OF Clarias gariepinus ADMINISTERED SERIALLY DILUTED DOSES OF OVAPRIM

DOI: 10.7904/2068–4738–VI(11)–30

Lateef Oloyede TIAMIYU, Victor Tosin OKOMODA*, Muyiwa Emmanuel OYENIYI, Juliet APEREGH

Department of Fisheries and Aquaculture, University of Agriculture Makurdi, NIGERIA
*Tel: +2348033319959 e–mail: okomodavictor@yahoo.com

Abstract. This study aim to study the spawning performance of African catfish induced with ovaprim serially diluted with 9% saline and coconut water at ratios of 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8 and 1:9 with 1:0 serving as the control, latency period was standardized using recommended time by the manufacturer. For saline water, egg hosed out with ease only for dilution of 1:1 and with harder press striping was possible till 1:7 beyond which stripping was not possible, however using coconut water, eggs hosed out with ease up to 1:4 while harder press made striping possible till the last dilution (1:9). Fertilization decreased significantly (P > 0.05) as the dilution increases with both diluents. Hatching was presumed complete at about 28 hours after fertilization. Result obtained show that hatchability decreased with increasing dilution with saline while there was no statistical change in values obtain with coconut water up to 1:3 however value decreased thereafter, the study shows that hatchery operation for African catfish can use coconut water and saline water as diluents up to 1:4 and 1:1 dilution respectively at normal latency period without significant effect on spawning performance.

Keyword: Coconut water, Saline water, Fertilization, Hatchability, Synthetic hormone

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