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	Provedor de dados OceanDocs (4) Autor Getabu, A. (4) Cowx, I.G (1) Muchiri, M.S. (1) Njiru, M. (1) Ojuok, J.E (1) Okemwa, E. (1) Okeyo Owuor, J.B. (1) Wakwabi, E. (1) Mais... Palavra-chave Fishery management (2) Http://aims.fao.org/aos/agrovoc/c_24026 (2) Http://aims.fao.org/aos/agrovoc/c_4159 (2) Lake fisheries (2) Oreochromis niloticus (2) Exploitation (1) Feeding behaviour (1) Fish ponds (1) Food organisms (1) Freshwater fish (1) Http://aims.fao.org/aos/agrovoc/c_10778 (1) Http://aims.fao.org/aos/agrovoc/c_15487 (1) Http://aims.fao.org/aos/agrovoc/c_24251 (1) Http://aims.fao.org/aos/agrovoc/c_2929 (1) Http://aims.fao.org/aos/agrovoc/c_3873 (1) Http://aims.fao.org/aos/agrovoc/c_4343 (1) Http://aims.fao.org/aos/agrovoc/c_4945 (1) Http://aims.fao.org/aos/agrovoc/c_6524 (1) Http://aims.fao.org/aos/agrovoc/c_7007 (1) Inland fisheries (1) Mais... Tipo do documento Proceedings Paper (4) Ano 2006 (1) 1994 (3) País Belgium (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última A comparative study on the feeding habits of Oreochromis niloticus (Linnaeus) in Nyanza Gulf Lake Victoria and sewage fish ponds OceanDocs Getabu, A.. Gut content analysis of Oreochromis niloticus from the Nyanza Gulf, Lake Victoria showed that the bulk of the food items ingested constituted bottom deposits and blue green algae. Among the live food items ingested, blue green algae (Cyanophyceae) constituted 53.6%, the diatoms (Bacillariophyaceae) 19.7%, aquatic invertebrates (mainly Copepoda, Cladocera, and Rotifera) 12.9%, desmids (Desmidaceae) 7.7% and lastly the green algae (Chlorophyceae) 6.2%. The most preferred food items were: Spirulina laxisma and Nitzschia accicularis. The least preferred food items were: Lyngbya circumcreta, Microcystis aeruginosa and Pediastrum simplex. The quantity of food eaten by O. niloticus to satiation ranged from 0.016-4.5% body... Tipo: Proceedings Paper Palavras-chave: Oreochromis niloticus; Feeding behaviour; Fish ponds; Food organisms; Sewage; Feeding behaviour; Fish ponds; Sewage; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_2929; Http://aims.fao.org/aos/agrovoc/c_7007. Ano: 1994 URL: http://hdl.handle.net/1834/1160 Dominance of introduced Nile tilapia, Oreochromis niloticus (L.) in Lake Victoria: A case of changing biology and ecosystem OceanDocs Njiru, M.; Ojuok, J.E; Getabu, A.; Muchiri, M.S.; Cowx, I.G; Okeyo Owuor, J.B.. Nile tilapia, Oreochromis niloticus together with other tilapiines of Oreochromis leucosticus, Tilapia zillii and Sarotherodon melanopleudra (=T. rendalii) were introduced into Lake Victoria (Kenya) between 1951 and 1962 to boost the then declining fishery. Only O. niloticus was able to establish leading further to reduction in endemic tilapiines of Oreochromis variabilis and Oreochromis esculentus. O. niloticus currently forms the third commercially important species after introduced Nile perch, Lates niloticus and a native cyprinid Rastrineobola argentea, whereas other tilapias are extinct or are occasionally caught in the lake. Information was collected from by bottom trawling and from published literature to ascertain possible factors leading to... Tipo: Proceedings Paper Ano: 2006 URL: http://hdl.handle.net/1834/2761 Mortality rate, exploitation and recruitment in Oreochromis niloticus (Linnaeus) in Nyanza Gulf of Lake Victoria, Kenya OceanDocs Getabu, A.. 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... Tipo: Proceedings Paper 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. Ano: 1994 URL: http://hdl.handle.net/1834/1175 Recent trends in research on Lake Victoria fisheries. Proceedings of the Second EEC Regional Seminar on Recent Trends of Research on Lake Victoria Fisheries, organized and hosted by Kenya Marine and Fisheries Research Institute (KMFRI), 25-27 September 1991, Kisumu, Kenya OceanDocs Okemwa, E.; Wakwabi, E.; Getabu, A.. Topics on Lake Victoria limnology, benthic fauna, stock assessment, catch assessment survey, gear selectivity, fisheries ecology, fish parasites and marketing economics are covered. Management and conservation of the lake's fisheries and other aquatic resources are discussed. Dialogue between fishermen, scientists and administrators is stressed, measures to be undertaken are addressed and further research is recommended. Tipo: Proceedings Paper Palavras-chave: Fishery management; Freshwater fish; Inland fisheries; Lake fisheries; Limnology; Resource management; Stock assessment; Zoobenthos; Fishery management; Lake fisheries; Limnology; Stock assessment; Inland fisheries; Resource management; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4159; Http://aims.fao.org/aos/agrovoc/c_4343; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_3873; Http://aims.fao.org/aos/agrovoc/c_6524; Http://aims.fao.org/aos/agrovoc/c_15487. Ano: 1994 URL: http://hdl.handle.net/1834/2125 Registros recuperados: 4 Primeira ... 1 ... Última

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