Fish assemblages in the Upper part of the Volta River, Burkina Faso: A link analysis towards fisheries management and conservation

Mano, Komandan; Ouéda, Adama; Ouedraogo, Richard; Ouédraogo, Idrissa; Kaboré, Idrissa; Kabré, Gustave B.; Melcher, Andreas

doi:10.4314/ijbcs.v13i6.11

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Important roles are assigned to fishing and fish farming, but scientific knowledge lacks suddenly, which can compromise the management of the future reservoir fishery. Though a few works like [3] [4] [5] and [6] were recently done on the upper part of Mouhoun, they do not provide a comprehensive understanding of the state of the fish community of the upcoming reservoir. Moreover, in Burkina Faso, the fish communities are seldom studied before the creation of reservoirs, including the large size ones that are Toece (5000 ha large; created in 1995), Ziga (8000 ha; 2000), Sourou (10,000 ha; 1984), Kompienga (20,000 ha; 1988) and Bagré (25,000 ha; 1992).…”

Section: Problematicmentioning

confidence: 99%

The Fish Fauna of the Future Large Size Reservoir of Ouessa, on the Mouhoun River, Burkina Faso

Ouedraogo¹,

Sawadogo²,

Da³

et al. 2021

ABB

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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).

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Section: Problematicmentioning

confidence: 99%

The Fish Fauna of the Future Large Size Reservoir of Ouessa, on the Mouhoun River, Burkina Faso

Ouedraogo¹,

Sawadogo²,

Da³

et al. 2021

ABB

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“…Pendant que l'étude des traits morphologiques et méristiques permet d'identifier les stocks de poissons et de décrire les conditions du stock (Giducos et al, 2015), celle-ci est presque inexistante en ce qui concerne S. maderensis. Pourtant, la connaissance de la ressource est préalable à une gestion durable de la pêche (Ouedraogo et al, 2015 ;Mano et al, 2019). Par conséquent, l'objectif de la présente étude est d'identifier le stock de Sardinelle plate exploité sur les côtes béninoises et les conditions de vie de cette espèce à travers son embonpoint.…”

Section: Introductionunclassified

Caractérisation morphologique, croissance staturo-pondérale et facteur de condition de la Sardinelle plate (Sardinella maderensis Lowe, 1838) des eaux côtières du Bénin (Afrique de l’Ouest)

Hoto¹,

Sossoukpe²,

Imorou³

et al. 2022

Int. J. Bio. Chem. Sci

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La Sardinelle plate est l’un des petits pélagiques côtiers béninois soumis à une forte pression de pêche. Cette étude présente la caractérisation morphologique, le mode de croissance et l’embonpoint de l’espèce. Pendant douze mois, 1026 spécimens de Sardinella maderensis ont été échantillonnés aléatoirement dans les débarquements au port de pêche artisanale de Cotonou. Parmi les différents paramètres biométriques et méristiques relevés sur chaque spécimen, seules la longueur totale et la grande hauteur ont montré une différence significative suivant le sexe (p<0,05). Ainsi, les femelles présentent un corps plus long et plus haut que les mâles signalant l’existence d’un dimorphisme sexuel chez l’espèce. L’analyse factorielle discriminante révèle que le nombre de branchiospines sur les branches supérieure et inférieure du premier arc branchial ainsi que les ratios longueur de la tête sur distance orbitaire, longueur pré-orbitaire sur distance orbitaire et longueur à la fourche sur longueur totale constituent des paramètres discriminants pouvant permettre de caractériser l’espèce suivant les différents stades de vie. La relation âge-longueur indique que la Sardinelle plate développe une croissance allométique rapide dès le bas âge. Les valeurs mensuelles élevées du facteur d’embonpoint attestent d’une bonne adaptation de l’espèce aux conditions écologiques dominantes de son milieu de vie. The flat Sardinella is one of the small Beninese coastal pelagic species subject to strong fishing pressure. The study aims to carry out morphological characterization, growth model and body condition factor of the species. For twelve months, 1,026 specimens of Sardinella maderensis were randomly sampled in the landings at artisanal fishing port of Cotonou. Among the various biometric and meristic parameters recorded on each specimen, only total length and great body height showed a significant difference according to the sex (p<0.05). Indeed, females have longer and higher body than males, indicating the existence of sexual dimorphism in the species. Discriminant factor analysis reveals that the number of gill rakers on the upper and lower branches of the first gill arch as well as the ratios of head length by orbital distance, pre-orbital length by orbital distance and fork length by total length constitute the discriminating parameters that can be used to characterize the species at different life stages. The age-length relationship indicates that the species develops rapid allometric growth from an early age. The relatively high mean value in the body condition factor attests to the good adaptation of this species to the prevailing ecological conditions of its living environment.

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Assessment of climatic and environmental parameters on fish abundance of an afro-tropical reservoir

Obayemi,

Komolafe,

Ayodeji

et al. 2024

Sci Rep

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This study assessed the impacts of climatic parameters (rainfall and temperature) and environmental variables (transparency, depth, chloride, TS, TSS, TOC) on the abundance of commercially important fish species in Esa-Odo. The research question was to find out if climatic and environmental factors influence the abundance of fish species in an afro-tropical reservoir. Fish species were collected on a monthly basis for two annual cycles covering both dry and rainy seasons. GIS-based climatic data was used to determine the relationship between climatic conditions and fish species abundance. Results showed that the highest abundance of fish was recorded during the rainy season, with Oreochromis niloticus being the most dominant species throughout the sampling period. Trend analysis revealed that variations in climate and environmental parameters influenced the abundance of different fish species in the reservoir. Mann-Kendal analysis indicated that an increase in rainfall led to an increase in reservoir depth, a decrease in transparency levels, and a reduction in temperature, with a Sen’s slope value of -38. Additionally, CCA and correlation matrix results demonstrated that climate and environmental parameters significantly influenced fish species abundance. The study emphasized the importance of climatic and environmental factors in the abundance of fish species in the reservoir, providing valuable information for future research on fishery resources. Governments and stakeholders were urged to prioritize the conservation and management of the reservoir’s fish population to prevent declines. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-75181-y.

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Fish assemblages in the Upper part of the Volta River, Burkina Faso: A link analysis towards fisheries management and conservation

Cited by 5 publications

References 17 publications

The Fish Fauna of the Future Large Size Reservoir of Ouessa, on the Mouhoun River, Burkina Faso

The Fish Fauna of the Future Large Size Reservoir of Ouessa, on the Mouhoun River, Burkina Faso

Caractérisation morphologique, croissance staturo-pondérale et facteur de condition de la Sardinelle plate (Sardinella maderensis Lowe, 1838) des eaux côtières du Bénin (Afrique de l’Ouest)

Assessment of climatic and environmental parameters on fish abundance of an afro-tropical reservoir

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