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Effect of Stocking Densities on Growth and Feed Utilization of Hybrid Catfish (Clarias gariepinus X Heterobranchus longifilis) Fed at 1% Body Weight
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Volume 3, 2015
Issue 6 (December)
Pages: 211-217   |   Vol. 3, No. 6, December 2015   |   Follow on         
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Chukwuma Okereke Ofor, Department of Fisheries and Aquatic Resources Management, Michael Okpara University of Agriculture, Umudike, Nigeria.
Ofonime Edet Afia, Department of Fisheries and Aquatic Environmental Management, University of Uyo, Uyo, Nigeria.
The stocking density of hybrid catfish (Clarias gariepinus X Heterobranchus longifilis) fed at 1% body weight was investigated. The fish were reared using tarpaulin tanks measuring 1m3 in 250 litres of water and was grouped into five densities-9, 18, 38, 75 and 100 fish/m3. The experiment had three replicate and lasted for 12 months during wish monthly sampling was done to measure body weight and feed was adjusted accordingly. The highest mean weight gain was at stocking density 75 fish/m3 (766.60 ± 139.18) while the lowest weight gain was recorded at stocking density 100 fish/m3 (625.16 ± 68.14) and was not significantly different (p>0.05). There was no significant difference in specific growth rate and feed conversion ratio in all the stocking densities (p>0.05). Protein efficiency ratio of stocking density 100 fish/m3 and 75 fish/m3 were similar (p>.05) and significantly different from others (p<0.05). The highest percentage survival of 64% was recorded at stocking density 38 fish/m3 while the least was recorded at stocking density 100 fish/m3. There was significant difference among the treatments (p<0.05). Mean water quality parameters ranged from: temperature 28.3°C-28.7°C, Dissolved oxygen 5.05 mg L – 5.42 mg/L, pH 7.08 -7.69. This was within the range suitable for aquaculture. Stocking density 75 fish/m3 can be used at 1% body weight feeding to achieve high weight gain.
Hybrid Catfish, Stocking Density, Water Quality, Growth, Feed Utilization
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