Relative efficiency of monofilament and multifilament trammel nets in southern portion of Lake Kainji, Nigeria
The relative efficiency and selectivity of monofilament and multifilament trammel nets in southernbasin of Lake Kainji were studied. The netswere set and inspected daily for 30 consecutive fishingdays. Monofilaments trammel nets had the highest relative species diversity index of 0.52 whilemultifilament had 0.48. A total of 204 fish were caught, 64.7% was caught by monofilament netsand multifilament net 35.3%. This suggests, that there was significant (P < 0.05) variation incatching efficiency of the trammel netswith regardto Citharinus citharus with the monofilament nethaving the highest 79 fishes, but was not significant (P > 0.05) in overall number of differencespecies caught. However, trammel nets showed better efficiency for catching C. citharus, S.membranaceous, C. laticeps, O. nitoticus, Sarotherodon, than other species caught. There is nosignificant difference (P > 0.05) in the minimum and maximum sizes of fish caught, and thisindicates the efficiency of the trammel nets in avoiding juveniles of commercial species, due to themeshsizes used (3" and 5").This implies that rational exploitation could lead to proper management of fish stocks in the lake,which is now lacking. It is concluded that monofilament net is more efficient than multifilamenttrammel netKeywords:Trammel nets, Catch efficiency, Mode of capture, Lake Kainji
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
2007
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| Subjects: | Fisheries, |
| Online Access: | http://hdl.handle.net/1834/37334 |
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