Effect of mesh size on catch performance of driftnets fishing in Lake Kainji
The studies on effect of mesh size on catch performance of driftnets fishing in Lake Kainji was experimented using 38.1mm, 63.5mm and 88.9mm stretched mesh size for 21 consecutive fishing days. The drifinets were operated by two fishing canoe; the operation was between 14.30 hours- 16.00 hours daily in the afternoon. Twenty-two fish species belonging to ten fish families were caught. The Species Diversity Index (SDI) revealed that 38.1mm stretched mesh size driftnet recorded the highest index of 0.77 next by 63.5mm mesh size with 0.45 and the least index of 0.36 was obtained in 88.9mm stretched mesh size driftnet. A total of 372 fishes were caught, 54.30% of this was caught by 38.1mm mesh size followed by 68.9mm mesh size (26.34%) and lowest (19.35%) was recorded by 63.5mm mesh size driftnet. The seven abundant fish species in the driftnets catches were S. galilaeus, D. rostratus, A. baremoze, S. membranaceus, T. zillii, L. senegalensis and H. fascialus. The total biomass of 25,314g (25.3kg) was obtained, 45.51% of this weight was captured 88.9mm mesh size while the least 24.24% was obtained in 63.5mm mesh size drifinet. S. galilaeus contributed the greatest proportion of weight 49.5% followed by D. rostratus 13.2% and L. senegalensis 10.3%. Recommendation was made for further studies in this aspect. Policies should also be directed to provide social amenities to the communities around the Lake.
| Main Authors: | , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2013
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| Subjects: | Fisheries, Nigeria, Kainji L., freshwater environment, automation, |
| Online Access: | http://hdl.handle.net/1834/39067 |
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