Abstract
The conservation status and the vulnerability to fishing pressure of the ichthyological population of the Bandama River located in the Marahoué Region (Côte d’Ivoire) were assessed. Sampling of fish fauna was conducted from September 2019 to November 2020 using experimental and artisanal fisheries. The results of International Union for Conservation of Nature show that, the majority of the fish species (88.7%) inventoried were classified as "least concern". The "high to very high" and "very high" categories are represented respectively by two species and one species. These include Heterobranchus longifilis and Malapterurus electricus, which belong to the "high to very high" vulnerability category, and Clarias gariepinus, which belongs to the "very high" category. In addition, 79.87% of the species in this stand have vulnerability between "low" and "moderate". Key words: Vulnerability to fishing pressure, Ichthyofauna, Heterobranchus longifilis, Malapterurus electricus, Clarias gariepinus.
Highlights
Aquatic environments are a reservoir of great biodiversity and play a very important bio-ecological role (Ndour et al, 2011)
The present study aims to analyze and make available to the country's decision makers, information relating to the conservation status and vulnerability to fishing pressure of the ichthyofauna of the Bandama River in the Marahoué region (Central West of Côte d'Ivoire) for a better conservation
Using the IUCN Red List system, the 71 fish species collected in the Bandama River located in the Marahoué region and identified to the specific level were divided into 5 categories (Table 1 and Figure 2)
Summary
Aquatic environments are a reservoir of great biodiversity and play a very important bio-ecological role (Ndour et al, 2011). These aquatic ecosystems are under increasing pressure from human activities (construction of dams, pollution from various sources, etc.) (Paul, 2017). Côte d'Ivoire does not escape these anthropogenic pressures This watercourse is subject to numerous disturbances, among others, fishing, the discharge of industrial effluents from the company of lemonade and breweries of Africa (SOLIBRA) in Bouaflé, the use of fertilizers and of pesticides in the large sugar cane plantations of the integrated agricultural production unit of SUCRIVOIRE in Zuénoula. In recent years the Bandama River watershed in the Marahoué region has been subject to heavy illegal mining operations and in violation of environmental protection regulations
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