Multigear fishery of Nile perch (Lates niloticus) in the Winam Gulf of Lake Victoria: with special reference to mortality, selection and catch/effort data
A survey of multigear fishery of Nile perch (Lates niloticus) in the Winam Gulf of Lake Victoria indicates that total mortality coefficient (Z) determined from longline fishery using hook number 6 was double that of hook number 7. Total mortality coefficient determined from gillnets and beachseines were lower than those of hooks. The catch per unit effort (C/f) measured using different criteria indicated an increase for all gears in 1990 as compared to 1989 except for gillnets. A two-fold increase in unit effort (f) increased the C/f for mosquito seines by only 30%. The typical exponential decay of C/f with increasing f of exploited stock in equilibrium was lacking in the case of Nile perch in the Winam Gulf.
| Main Authors: | , |
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| Format: | Proceedings Paper biblioteca |
| Language: | English |
| Published: |
ICIPE SCIENCE
1994
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| Subjects: | Lates niloticus, Gillnets, Lake fisheries, Catch/effort, Exploitation, |
| Online Access: | http://hdl.handle.net/1834/1174 |
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