Induced breeding of African catfish Clarias gariepinus was conducted to investigate the effect of... more Induced breeding of African catfish Clarias gariepinus was conducted to investigate the effect of different male-female broodstock ratio on the breeding performance. The broodstock for the experiment were collected from the National Institute for Freshwater Fisheries Research, New Bussa and the experiment was carried out at the hatchery section of Happy Island Garden, Sokoto. The experiment was set up in a completely randomized design (CRD) with treatment combinations as; 1:1 male:female broodstock ratio (Treatment A), 1:2 male:female broodstock ratio (Treatment B) and 1:3 male:female broodstock ratio (Treatment C). The broodstocks were injected with ovulin hormone at the recommended dosage of 0.5ml/kg body weight for the females and half dosage was administered to the males. The result showed that Treatment A had the highest fertilization rate (71.66%) and hatching rate (88.70%) as well as survival rate (73.17%) followed by Treatment B with 68.69% fertilization but had the least values for hatching rate (80.58%) and survival rate (70.83%). Treatment C had the lowest value for fertilization (64.25%) but was following Treatment A in terms of hatching rate (84.54%) and survival rate (72.13%). However, no significant differences (p>0.05) exist between the treatments in terms of the breeding performance parameters examined. The present study showed that C. gariepinus of mean body weight of 600g can successfully be induced with ovulin hormone at different broodstock ratios to ovulate and obtain eggs and larvae of good quality.The African catfish is widely considered as the leading cultured fish in Nigeria and it is considered as the most sought after fish species among fish farmers and consumers because it commands a very good commercial value (Oladosu et al., 1993). It is a very important fish in the commercial fisheries in Nigeria because of its desirable qualities such as ability to tolerate low dissolved oxygen, ability to produce in captivity and fast growth rate. It is also observed to have efficient feed conversion capacity (Nweke and Ugwumba, 2005).
Induced breeding of African catfish Clarias gariepinus was conducted to investigate the effect of... more Induced breeding of African catfish Clarias gariepinus was conducted to investigate the effect of different male-female broodstock ratio on the breeding performance. The broodstock for the experiment were collected from the National Institute for Freshwater Fisheries Research, New Bussa and the experiment was carried out at the hatchery section of Happy Island Garden, Sokoto. The experiment was set up in a completely randomized design (CRD) with treatment combinations as; 1:1 male:female broodstock ratio (Treatment A), 1:2 male:female broodstock ratio (Treatment B) and 1:3 male:female broodstock ratio (Treatment C). The broodstocks were injected with ovulin hormone at the recommended dosage of 0.5ml/kg body weight for the females and half dosage was administered to the males. The result showed that Treatment A had the highest fertilization rate (71.66%) and hatching rate (88.70%) as well as survival rate (73.17%) followed by Treatment B with 68.69% fertilization but had the least values for hatching rate (80.58%) and survival rate (70.83%). Treatment C had the lowest value for fertilization (64.25%) but was following Treatment A in terms of hatching rate (84.54%) and survival rate (72.13%). However, no significant differences (p>0.05) exist between the treatments in terms of the breeding performance parameters examined. The present study showed that C. gariepinus of mean body weight of 600g can successfully be induced with ovulin hormone at different broodstock ratios to ovulate and obtain eggs and larvae of good quality.The African catfish is widely considered as the leading cultured fish in Nigeria and it is considered as the most sought after fish species among fish farmers and consumers because it commands a very good commercial value (Oladosu et al., 1993). It is a very important fish in the commercial fisheries in Nigeria because of its desirable qualities such as ability to tolerate low dissolved oxygen, ability to produce in captivity and fast growth rate. It is also observed to have efficient feed conversion capacity (Nweke and Ugwumba, 2005).
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