Preliminary inventory and distribution of the ichthyological biodiversity of the watershed of the Doubou River Ngounié Province, Gabon

The composition and distribution of the ichthyological diversity of the Doubou basin were studied during the month of August 2020. The fish were caught using dip nets, seines and nets. In total, 343 specimens were collected, totaling to 42 species divided into 13 families and 7 Orders. Four (4) species show high relative abundances, namely Brycinus kingsleyae (13.70%), Brycinus bartoni (12.83%), Brycinus longipinnis (9.33%) and Epiplatys ansorgii (6.71%). The Shannon diversity index (H’) and the Pielou fairness index (J) give values of 3,131 bits and 0.838, respectively, indicating great fish diversity and a regular distribution of species. Factor Correspondence Analysis (FCA) shows that the depth and width of rivers influence species richness. published by the Journal of Biodiversity and Environmental Sciences | JBES