Citation
Pepple P.C.G., . and Ofor C. O., . Length-weight relationship and condtion factor of Heterobranchus lingifilis Valenciennes 1840 reared in tank and earthen ponds. pp. 124-132. ISSN 0116-6514
Abstract
Length-weight relationship and condition factor of Heterobranchus longifilis Valenciennes 1840 reared in fibre-glass tanks and earthen ponds at the Nigerian Institute for Oceanography and Marine Research Lagos Nigeria were studied. Fish were stocked at a density of 20 fish.m in triplicate 25m ponds fertilised with chicken droppings and hay and 250 fish.m- in triplicate 2m fibre-glass tanks. The fish were fed with pelleted feed of 42 crude protein at a mean rate of 1.3 fresh body weight thrice daily for 6 months. At the end of 6 months of culture 30 H. longifilis were sampled from each replicate. They were weighed and total length measured. Fish reared in tanks had a mean length of 30.30.5cm and a mean weight of 1 344155g. Fish reared in ponds had a mean length of 32.61.5cm and a mean weight of 1 36040.6g. Mean k� value was 1.630.12 and 1.50.02 in tanks and ponds respectively. Mean b� values were lower in tanks at 2.880.2 in comparison with 3.0470.015 obtained for ponds indicating negative and positive allometry respectively. The length“weight relationship of H. longifilis reared in tanks and ponds showed positive correlation (r 0.99).
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Abstract
Length-weight relationship and condition factor of Heterobranchus longifilis Valenciennes 1840 reared in fibre-glass tanks and earthen ponds at the Nigerian Institute for Oceanography and Marine Research Lagos Nigeria were studied. Fish were stocked at a density of 20 fish.m in triplicate 25m ponds fertilised with chicken droppings and hay and 250 fish.m- in triplicate 2m fibre-glass tanks. The fish were fed with pelleted feed of 42 crude protein at a mean rate of 1.3 fresh body weight thrice daily for 6 months. At the end of 6 months of culture 30 H. longifilis were sampled from each replicate. They were weighed and total length measured. Fish reared in tanks had a mean length of 30.30.5cm and a mean weight of 1 344155g. Fish reared in ponds had a mean length of 32.61.5cm and a mean weight of 1 36040.6g. Mean k� value was 1.630.12 and 1.50.02 in tanks and ponds respectively. Mean b� values were lower in tanks at 2.880.2 in comparison with 3.0470.015 obtained for ponds indicating negative and positive allometry respectively. The length“weight relationship of H. longifilis reared in tanks and ponds showed positive correlation (r 0.99).
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Heterobranchus longifilis |
| AGROVOC Term: | Tanks |
| AGROVOC Term: | Low income groups |
| AGROVOC Term: | Clariidae |
| AGROVOC Term: | Market prices |
| AGROVOC Term: | Maturity |
| AGROVOC Term: | Fish ponds |
| AGROVOC Term: | Fish farms |
| AGROVOC Term: | Fingerlings |
| AGROVOC Term: | Crude protein |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:28 |
| URI: | http://webagris.upm.edu.my/id/eprint/23687 |
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