International Journal of Entomology Research

Authors
Jeff Gildas Antoine Okoya, Fadéby Modeste Gouissi, Koudjodé Simon Abahi, David Darius Adje, Christelle Madina Tchaou, Zoulkanerou Orou Piami, Midogbo Pierre Gnohossou

Abstract
The present study aims at making an inventory of the Affon River's macroinvertebrates. By means of a Suber net, they were sampled in low water in seven different stations along the river. We had thus possessed in the calculations of their occurrence frequency, the Simpson Index, the Shannon Biodiversity Index and the equitability of Piélou. Of the 1250 species of macroinvertebrates summed and divided into 3 classes, 11 orders and 24 families were inventoried. From there, the insects with 68.56% of the species’ richness were the most diversified because we found that 54.17% of the groups captured are rare species. It is thus noted that low diversity and fairness values strongly noticed in the majority of the experiment stations show the river's bad quality under the influence of used domestic water discharged, as well as agricultural effluents. So it is important to note that this situation has resulted in the disappearance of several species of Macroinvertebrates especially those pollution-sensitive but looking at the high rate of the diversity of the pollution-sensitive macroinvertabrates in Teneka 1 station, it shows that the water therein is of a very good quality. Thus, further studies need to be undertaken to study the ecological status of the river using biotic indices in order to make adequate decisions for its sustainable management and avoid its irreversible degradation.