Effect of Varying Doses of Ovatide on the Breeding Performance of African Catfish (Clarias gariepinus Burchell, 1822) in Sokoto, North-western Nigeria

Comparison of reproductive performance of Clarias batrachus (Linnaeus, 1758) collected from three Indian rivers

“…Stripping percentage also varied significantly (p<0.05) among the fish collected from different rivers and was highest in magur from Godavari [14.57±1.026 (P); 11.82±0.184 (O)], followed by Krishna [9.74±0.286 (P); 9.90±1.149 (O)] and Narmada [10.04±0.498 (P); 9.17±0.457 (O)]. Similar values were observed in closely related species Clarias gariepinus (De Graaf et al, 1995;Shinkafi and Ilesanmi, 2014). Since stripping process was involved in the breeding programme, PGSI is employed as an index in the present study according to Oyelese (2006) instead of GSI.…”

“…Uneaten food was removed after 30 min. At the end of larval rearing, survival of fish was estimated according to Shinkafi and Ilesanmi (2014).…”

Effect of Different Doses of Ovulin Hormone Suspended in Saline on the Induced Breeding Performance of African Catfishes Clarias anguillaris and Clarias gariepinus in Sokoto, Nigeria

“…de Graaf and Janssen [22] reported that the development process of fish from fertilized egg to hatching is like all other biological processes, that is, it is dependent upon water temperature, as such the higher the water temperature the faster the eggs hatch. The incubation period observed in this experiment was in the range of 21 to 23 hrs at a temperature range of about 25.9 to 28.6°C which was similar to observations of Viveen et al 1985) and was also in comparison with the findings of [23] for Clarias gariepinus that achieved incubation period of 15hrs at a temperature of 30°C.…”

“…This was similar to what was obtained by [12] who examined the effect of varying doses of normal saline-diluted ovaprim on the induced breeding of C. gariepinus. This work however, showed that suspending generic hormone in saline at 25%, 50% and 75% dilution levels can be effective in the induced breeding of African catfish, which agrees with the findings of [23] that even small quantity of hormone below the manufacturer's recommended dose can successfully induce ovulation in African catfish.…”

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“…Concerning the latency period, all C. gariepinus brood fish spawning 11-13 h after hormones injection. These results were higher than those reported by Shinkafi and Ilesanmi (2014) for African catfish, but it was lower than those reported in previous studies on carp (Arabaci et al, 2004;Falahatkar et al, 2013). Furthermore, experimentally stressed females exhibited significant reduced egg weight and average number of ovulated eggs in comparison to control females.…”