Data/hora: 03/06/2024 04:31:56

Provedor de dados: | 20
País: | Belgium
Título: | Mortality rate, exploitation and recruitment in Oreochromis niloticus (Linnaeus) in Nyanza Gulf of Lake Victoria, Kenya
Autores: | Getabu, A.
Data: | 2006-03-16
Ano: | 1994
Palavras-chave: | Oreochromis niloticus; Exploitation; Fishery management; Lake fisheries; Mortality; Fishery management; Lake fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4159; Http://aims.fao.org/aos/agrovoc/c_4945.
Resumo: | An analysis was done on length frequency data to study mortality,     exploitation rate and recruitment in Oreochromis niloticus in Nyanza     Gulf, Lake Victoria. The fishing mortality (F) and natural mortality     (M) were 0.468 y super(-1) and 2.0 y super(-1) respectively. The     exploitation rate was 57.2%. Yield per recruit under the fishing     regime was 250 g. Its predicted value at maximum sustained yield was     530 g, which could be obtained at a fishing mortality of 1.5 y     super(-1). The recommended value was 500 g to be obtained at a fishing     mortality of 1.0 y super(-1). The maximum biomass per recruit (B/R)     was 1132.48 g while the optimum was 1068.38 g. The biomass recruit     under the present fishing regime is 534.19 g which is too low. There     is severe overfishing as there are a lot of immature fish in the     catch. The analysis shows that the yield can double if the recommended     mesh size is adopted in the fishery.
Tipo: | Proceedings Paper
Idioma: | Inglês

Identificador:

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 Press, p. 43-52

9290640789

http://hdl.handle.net/1834/1175

Editor: | ICIPE SCIENCE

Formato:

354788 bytes

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