Contribution to the knowledge of the ichthyofauna in the Inkisi River, Lower Congo (RDC)
Lunkayilakio, Soleil Wamuini × Vreven, Emmanuel Vandewalle, Pierre Mutambue, Shango Snoeks, Jos #
Muséum national d'histoire naturelle, Laboratoire d'ichtyologie générale et appliquée
Cybium vol:34 issue:1 pages:83-91
4th Encounters of Ichthyology in France location:Paris, FRANCE date:MAR 24-27, 2009
The composition and distribution of the ichthyofauna were studied in the Congolese part of the Inkisi River. We found 61 species belonging to 37 genera and 15 families. Cyprinidae were the richest family with 15 species. Mormyridae, Cichlidae and Clariidae were composed of 11, 9 and 7 species, respectively. The longitudinal profile of this part of the Inkisi River is characterized by three falls, that are from downstream to upstream: the Mantumpu falls at the river mouth (8 m high), the Zongo falls (58 m) at 6 km from its confluence with the Congo, and the Sanga falls (24 m) at 10 km from the Zongo falls. The presence of these falls has probably affected the fish fauna and could explain the important number of endemic species upstream. When only looking at the fish fauna of the main channel of the Inkisi, no significant difference in species richness was found between upper and lower part. This is probably due to the morphology of the river basin. The species richness and composition of the middle part, situated between the Zongo and Sanga falls, were not different from those found in the upper part of the basin. Nevertheless, they were different from those of the lower part.