Reliable and basic information on fish are required for the sustainable management of a fishery. For this reason, the fish fauna of the future reservoir of Ouessa in the low section of the Mouhoun River, Burkina Faso is studied. In order to describe the fish community, the fish were sampled in March 2020 thanks to cast nets and gill nets. They were sorted into species and each fish was weighted at the nearest 0.1 g and its total length measured at the nearest mm. The landings of commercial fishermen were also observed. In total, 1059 fishes were collected and grouped into 42 species, 27 generas and 16 families.The dominant species were Synodontis nigrita, Synodontis schall, Marcusenius senegalensis, Schilbe intermedius, Brycinus nurse and Alestes baremoze.However, the compilation of diverse sources suggests the presence of nearly 70 species. The index of Shannon-Weaver (3.97), the values of the condition factor, the fish size and the presence of intolerant species indicate the relatively good conditions of the aquatic ecosystem. Among the 24 dominant species, 54% have a positive allometric growth, 42% a negative allometric growth and 0.04 an isometric growth. This study builds the basis of sustainable management of the future reservoir of Ouessa that is planned to be the largest one of the country (40,000 ha large).
Fish populations and the exploitation of water bodies data are essential for the implementation of sustainable fisheries management strategies. Thus, fish diversity, fisheries production and fishermen's income in the «Mare aux Hippopotames» located in western Burkina Faso were studied. This study aims to characterise the fish fauna and fisheries in this natural lake. From 12 to 16 May 2020, experimental fishing was conducted using gillnets with mesh sizes of 10, 20, 35 and 40 mm and cast-nets in five stations. Supplementary data were collected within 22 commercial fishing landings. In total, 1642 fish individuals belonging to 29 species were collected. Twenty-two genera and 13 families were identified. Sarotherodon galilaeus is the dominant species (46.83%) followed by Oreochromis niloticus (11.02%), Brycinus nurse (10.66%). The fish fauna is quite varied and reflects the characteristics of the tropical fish fauna. Length-weight relationship revealed that some fish species have allometric growth while others have isometric growth. The density of fishermen, which is between 0.18 and 0.36 fishers per hectare shows a moderate pressure on the reservoir. The total production of the lake is estimated at 47.85 tonnes per year, i.e. an average yield of 398.78 kg. ha -1 . The average annual income of the fisherman is estimated at 528,000 FCFA.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.