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Review Papers | Agriculture and Animal Sciences | Benin | Volume 11 Issue 10, October 2022

Updating Benthic Macroinvertebrates Database of the Nokoue Lake in South Eastern Benin

H. B. P. Capo-Chichi | D. Adandedjan | P. A. Laleye

Abstract: The objective of this study was to update the existing database on the benthic macrofaunaof the Nokou? Lake. Seasonal sampling was conducted from March 2019 to February 2021 in 11 stations. Benthic fauna was collected with an Eckman grab, Surber net, and mesh screen. Taxonomic richness, estimated richness, occurrence, abundance, functional feeding groups were determined. Correspondence Factorial Analysis (CFA) and a Hierarchical Clustering (HCA) were performed to identify the different communities. The inventory indicated 83 taxa representing 32 770 specimens gathered into 54 families, 25 orders and 6 classes. The average predicted species richness was 85.88 ? 0.29 taxa without singletons and doubletons. Six classes of benthos were determined wuth crustaceans, the richest (23 taxa) and gastropods, the most abundant (58.4%). Three communities are formed with distinct taxa whose richnesses did not vary significantly between groups. The low number of constant taxa and the differentfunctional feeding groups are justified by the state of the environment, which is highly enriched in organic matter and its fragility due to its proximity to the ocean. It is urgent to rehabilitate the ecosystem in order to bring it back to life for an effective sustainability.

Keywords: benthic fauna, inventory, update, Lake

Edition: Volume 11 Issue 10, October 2022,

Pages: 44 - 56