[ Premier inventaire des macroinvertebres du fleuve Niger à Faranah en Guinée ]
Volume 44, Issue 4, February 2025, Pages 1030–1040
Aïssatou Lamarana Bah1, Idrissa Kabore2, Lanciné Sangare3, and Abdoulaye Barry4
1 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
2 Université Ouaga1 - Joseph Ki Zerbo, Burkina Faso
3 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
4 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
Original language: French
Copyright © 2025 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In Guinea, water resources are under anthropogenic pressure. Changes in water quality can impact the composition of aquatic fauna. To date this fauna is practically unknown in the Niger River in Guinea. Our research was carried out on a 10 km route from the river to Faranah town centre. The general objective is to assess the richness and distribution of macroinvertebrates. Five stations were sampled during three hydrological regimes: Periods of low water, rising water and recession. Changes in composition, abundance and richness were determined by Kruskal-Wallis analysis of variance. The Equitability Index was used to assess the distribution of different taxa in the sampled stations. The percentage of occurrence is used to determine the frequency of a taxon in a station. Diversity was assessed by the Shannon index. These indices were calculated considering the family as a taxonomic level. At the end of the inventory, 60 families were identified divided into 14 orders for 5 classes (insects, lamellibranchs, gastropods, crustaceans and annelids). This population is dominated by insects 57%. The faunal composition corresponds to the richness of African fresh waters. Depending on the hydrological regimes, 85% of the species collected are constant while for all the stations it is 88% which are fixed. The values of the Shannon ˃2 and equitability indices close to 1 reflect the presence of a very rich, diverse and stable benthic fauna.
Author Keywords: Niger River, Faranah, inventory, macro invertebrates.
Volume 44, Issue 4, February 2025, Pages 1030–1040
Aïssatou Lamarana Bah1, Idrissa Kabore2, Lanciné Sangare3, and Abdoulaye Barry4
1 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
2 Université Ouaga1 - Joseph Ki Zerbo, Burkina Faso
3 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
4 Institut Supérieur Agronomique et Vétérinaire de Faranah, Guinea
Original language: French
Copyright © 2025 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In Guinea, water resources are under anthropogenic pressure. Changes in water quality can impact the composition of aquatic fauna. To date this fauna is practically unknown in the Niger River in Guinea. Our research was carried out on a 10 km route from the river to Faranah town centre. The general objective is to assess the richness and distribution of macroinvertebrates. Five stations were sampled during three hydrological regimes: Periods of low water, rising water and recession. Changes in composition, abundance and richness were determined by Kruskal-Wallis analysis of variance. The Equitability Index was used to assess the distribution of different taxa in the sampled stations. The percentage of occurrence is used to determine the frequency of a taxon in a station. Diversity was assessed by the Shannon index. These indices were calculated considering the family as a taxonomic level. At the end of the inventory, 60 families were identified divided into 14 orders for 5 classes (insects, lamellibranchs, gastropods, crustaceans and annelids). This population is dominated by insects 57%. The faunal composition corresponds to the richness of African fresh waters. Depending on the hydrological regimes, 85% of the species collected are constant while for all the stations it is 88% which are fixed. The values of the Shannon ˃2 and equitability indices close to 1 reflect the presence of a very rich, diverse and stable benthic fauna.
Author Keywords: Niger River, Faranah, inventory, macro invertebrates.
Abstract: (french)
En Guinée, les ressources en eau subissent une pression anthropique. Les changements dans la qualité de l’eau peuvent avoir un impact sur la composition de la faune aquatique. A ce jour cette faune est pratiquement inconnue au fleuve Niger en Guinée. Notre recherche a été menée sur un parcours de 10 Km du fleuve au Centre-ville de Faranah. L’objectif général consiste à évaluer la richesse et la distribution des macroinvertébrés. Cinq stations ont été échantillonnées pendant trois régimes hydrologiques: Périodes d’étiage, de montée des eaux et de décrue. Les changements dans la composition, l’abondance et la richesse ont été déterminés par analyse de variance Kruskal-Wallis. L’Indice d’équitabilité a été utilisé pour évaluer la distribution des différents taxons dans les stations échantillonnées. Le pourcentage d’occurrence à servi pour déterminer la fréquence d’un taxon dans une station. La diversité a été appréciée par l’indice de Shannon. Ces indices ont été calculés en considérant la famille comme niveau taxonomique. Au terme de l’inventaire 60 familles ont été recensées reparties en 14 ordres pour 5 classes (insectes, lamellibranches, gastéropodes, crustacées et annélides). Cette population est dominée par les insectes 57%. La composition faunistique correspond à la richesse des eaux douces africaines. Suivant les régimes hydrologiques 85 % des espèces récoltées sont constantes alors que pour l’ensemble des stations c’est 88 % qui sont fixes. Les valeurs des indices de Shannon ˃ 2 et d’équitabilité proches de 1 reflètent la présence d’une faune benthique très riche, diversifiée et stable.
Author Keywords: Fleuve Niger, Faranah, inventaire, macro invertébrés.
How to Cite this Article
Aïssatou Lamarana Bah, Idrissa Kabore, Lanciné Sangare, and Abdoulaye Barry, “First inventory of macroinvertebrates of the Niger River in Faranah, Guinea,” International Journal of Innovation and Applied Studies, vol. 44, no. 4, pp. 1030–1040, February 2025.
