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  • 1
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    Stock assessment of Lates niloticus (L.), Oreochromis niloticus (L.) and Rastrineobola argentea (Pellegrin) using fishery dependent data from the Tanzanian waters of Lake Victoria (2021)
    Fisheries Data Working Group of the Lake Victoria Fisheries Research Project | Jinja
    In:  http://aquaticcommons.org/id/eprint/3748 | 424 | 2011-09-29 16:57:22 | 3748 | Lake Victoria Fisheries Organization
    Details
    Publication Date: 2021-06-29
    Description: Catch data were collected from three beaches in the Mwanza area of lake Victoria, Tanzania for Oreochromis niloticus (L.), Rastrineobola argentea (Pellegrin) and Lates niloticus (L.). Sampling took place in October 1997 and February, June and September 1998. The CPUE for O. niloticus was 3.9 to 6kg boat super(-1) and for R. argentea from 98 to 282 kg boat super(-1). There was no obvious trend in catch rates for L. niloticus. The modal length for O. niloticus recorded at Chole beach was 34cm TL. In February, fish were larger (41-45 cm) than in the other surveys. Rastrineobola argentea caught in October 1997 had modal length at 65 mm TL with some smaller fish. In February and June prominent length modes occurred at 45 and 58 mm respectively, which may represent the same cohort as the small fish caught in October 1997. In September 1998, there were two length modes at 46 and 60 mm. The 60 mm fish may represent the same cohort seen in previous surveys, suggesting growth from approximately 30 mm to 60 mm in an eleven-month period. Lates niloticus landed at Kayenze beach over the four surveys had a modal length of 46 cm TL. Fish species encountered on the three beaches during the surveys were O. niloticus, R. argentea, Bagrus docmak Forsskall, Clarias gariepinus (Burchell), Protopterus aethiopicus Heckel, Labeo victorians Boulenger, Synodontis afrofischeri Hilgendorf, Synodontis victoriae Boulanger, Schilbe intermedius (L.), Brycinus jacksonii (Boulanger), Mormyrus kannume Forsskall and Haplochromine cichlids
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/06
    Keywords: Fisheries ; Biology ; Tanzania ; Lake Victoria ; catch/effort ; fishery data ; fishery surveys ; lake fisheries ; stock assessment ; Bagrus docmac ; Brycinus jacksonii ; Clarias gariepinus ; Labeo victorianus ; Lates niloticus ; Mormyrus kannume ; Oreochromis niloticus ; Protopterus aethiopicus ; Rastrineobola argentea ; Schilbe intermedius ; Synodontis victoriae
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 79-83
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  • 2
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    Stock assessment of Lates niloticus (L.), Oreochromis niloticus (L.) and Rastrineobola argentea (Pellegrin) using fisheries-dependent data from Tanzania waters of Lake Victoria (2021)
    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/5063 | 424 | 2011-09-29 15:29:54 | 5063 | Lake Victoria Fisheries Organization
    Details
    Publication Date: 2021-07-08
    Description: Three commercially important fish species, Lates niloticus (L.), Rastrineobola argentea (Pellegrin) and Oreochromis niloticus (L.) that are fished by artisanal fishermen of Lake Victoria, Tanzania part, were studied in Kagera, Mwanza and Mara beaches from October 1997 to July 1999. Catches, effort, exploitation and stock structure were investigated. Beaches for sampling were selected based on importance for landing the above named fish species. The number of boats found on beach that day, the number that lay idle and their means of propulsion were recorded. As many boats as possible were sampled for gear type and gear size. The catches were sorted into species and measured. Variation in the species and size composition of landings was observed between regions, between months and between gears used. The implications of the findings to management are discussed.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/07
    Keywords: Fisheries ; Management ; Africa ; Tanzania ; Lates niloticus ; Oreochromis niloticus ; Rastrineobola argentea ; stock assessment ; artisanal fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 108-117
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