International Science Community Association International Research Journal of Biological Sciences 2278-3202 13 4 2024 11 10 Preliminary study of fish fauna of Loulali River, tributary of Louesse River (Kouilou-Niari basin), Lekoumou Departement (Congo Brazzaville) 25 30 EN Chaturvedi Prashant 1 Department of Biological Science, Rani Durgavati University, Jabalpur, MP, India Singh Divya 2 Department of Biological Science, Rani Durgavati University, Jabalpur, MP, India Pathak Renu 3 Department of Biological Science, Rani Durgavati University, Jabalpur, MP, India Beohar Purnima 4 Department of Biological Science, Rani Durgavati University, Jabalpur, MP, India ORTESE 1 Department of Microbiology, Joseph Sarwuan Tarka University, Makurdi, Benue State, Nigeria Aondover Raymond 2 Lin Su Su Mar 1 Department of Food Science, Mae Fah Luang University, Thailand and Department of Biotechnology, Mandalay Technological University, Mandalay, Myanmar and Department of Advanced Science and Technology, Nay Pyi Taw, Myanmar Myint Myo 2 Department of Biotechnology, Mandalay Technological University, Mandalay, Myanmar Chukeatirote Ekachai 3 Department of Food Science, Mae Fah Luang University, Thailand I. Mady Goma Dirat 1 Laboratoire de Recherche en Biologie et Ecologie Animales, Ecole Normale Supérieure, BP 69, Université Marien NGOUABI, Brazzaville, Congo and Faculté des Sciences Appliquées, Université DENIS SASSOU-N’GUESSO, udsn.cg Kintélé, Congo L.P. Boukama 2 Laboratoire de Recherche en Biologie et Ecologie Animales, Ecole Normale Supérieure, BP 69, Université Marien NGOUABI, Brazzaville, Congo A. Tsoumou 3 Laboratoire de Recherche en Biologie et Ecologie Animales, Ecole Normale Supérieure, BP 69, Université Marien NGOUABI, Brazzaville, Congo M. Mikia 4 Laboratoire de Recherche en Biologie et Ecologie Animales, Ecole Normale Supérieure, BP 69, Université Marien NGOUABI, Brazzaville, Congo H. Banga Mboko 5 Ecole Nationale Supérieure d’Agronomie et de Foresterie, BP 69, Université Marien NGOUABI, Brazzaville, Congo > 2024 7 18 2024 11 10 This study was carried out for the first time in the Loulali River, tributary of the Louesse (basin Kouilou-Niari) in the period from August 2014 and June 2016. 930 specimens of fish belonging to 32 species, 19 genera, 10 families and 5 orders were caught using cash nets. Cypriniformes have a high species richness with 12 species (38%), followed by Siluriformes and Perciformes (7 species, 22%). Enteromius holotaenia is the emblematic species of the environment with a relative specific abundance of 54%. The population of the Loulali River is diversified (H’= 2.78) and heterogeneous because the specific distribution is unbalanced (E = 0.56). Copyright@ International Science Community Association