Inventory of ichthyological population and on some physicochemical parameters characteristics of a drinking water supply dam: the Ehuikro lake (Bongouanou, Côte d’Ivoire)

Le résumé fourni par la source

A study of the qualitative and quantitative inventory of the ichthyological population as well as on some physicochemical parameters were carried out in the Ehuikro lake in Bongouanou (Côte d’Ivoire), from July 2017 to June 2018. Monthly experimental fisheries with monofilament nets help register 462 individuals classified into 12 species, including Oreochromis niloticus and Heterotis niloticus (two introduced species). These species are divided into nine genera, six families and three orders. Qualitatively, the Cichlidae was the dominant family (n = 4 species); followed by Clariidae (n = 3) and Claroteidae (n = 2) families. The Anabantidae, Arapaimidae and Channidae families are monospecific. Quantitatively, Hemichromis fasciatus and Heterotis niloticus have respectively the highest numerical (64%) and weight (45%) percentage. This lake, because of its diversified population and good organization, seems to be stable and balanced. Thus, the first qualitative and quantitative inventory of the ichtyological population of the Ehuikro lake, as well as the knowledge of the characteristics of some environmental parameters, will serve as references for the subsequent investigations of this fish fauna and the development of appropriate measures to ensure sustainable protection and exploitation of the services of this lake environment.

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