Invasive Species Compendium

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Abstract

Preliminary study of ichtyofaunic communities of the Ono lagoon (Ivory Coast).

Abstract

Objectives: The present work aims to study the structure and organization of the fish communities of the Ono lagoon. Methodology and Results: Fish were sampled monthly from September 2015 to February 2016 using traps, gill nets, harpoons and hawks. A total of 39 species belonging to 28 genera, 23 families and 8 orders was captured. Catches are dominated in term of abundance and biomass by freshwater species (n=31) representing 79.49% against 06 marine and/or estuarine species (20.51%) and 02 introduced species (5.12%). Specific diversity and equitability indices recorded were 4.44 bits/individuals and 0.85 respectively. The orders including the highest number of families and species were Perciformes (9 families and 18 species) followed by Osteoglossiformes and Characiformes (3 and 5 species respectively). Cypriniformes were represented by a single family (Cyprinidae) and three species whilst Mugiliformes, Clupeiformes and Eloptiformes were represented by only one species. Conclusion and application: This study allowed to know the fish community of Ono lagoon. Given the increasing eutrophication of the lagoon, these results will be a reference for further investigations of monitoring the state of the fish fauna and the development of adequate measures to prevent the loss of aquatic biodiversity.