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Please use this identifier to cite or link to this item: http://hdl.handle.net/1834/1174

Title: Multigear fishery of Nile perch (Lates niloticus) in the Winam Gulf of Lake Victoria: with special reference to mortality, selection and catch/effort data
Authors: Manyala, J.O.
Rabuor, C.O.
ASFA Terms: Catch/effort
Exploitation
Gillnets
Lake fisheries
Issue Date: 1994
Publisher: ICIPE SCIENCE
Citation: Okemwa, E.; Wakwabi, E.O.; Getabu, A. (Ed.) Proceedings of the Second EEC Regional Seminar on Recent Trends of Research on Lake Victoria Fisheries, NAIROBI : ICIPE SCIENCE, p. 67-72
Abstract: 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.
URI: http://hdl.handle.net/1834/1174
ISBN: 9290640789
Appears in Collections:Conference Papers

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