Hugueny Bernard, Lévêque Christian. (1994). Freshwater fish zoogeography in West Africa : faunal similarities between river basins. Environmental Biology of Fishes, 39, p. 365-380. ISSN 0378-1909.
Titre du document
Freshwater fish zoogeography in West Africa : faunal similarities between river basins
Année de publication
1994
Type de document
Article
Auteurs
Hugueny Bernard, Lévêque Christian
Source
Environmental Biology of Fishes, 1994,
39, p. 365-380 ISSN 0378-1909
Similarities between the freshwater fish faunas of 52 West African rivers have been investigated and three main zoogeographic regions recognized. The Sudanian region includes all rivers from Senegal to the Omo, as well as coastal basins from Ivory Coast to the Cross and the Wouri. The upper Guinean region comprises the coastal basins from Guinea to Liberia and the Lower Guinean one, the coastal rivers of Cameroon and Gaboon. The Sudanian region can be sub-divided into a Sudanian region sensu stricto, including the Sahelo-Sudanese rivers, and the Eburneo-Ghanean region corresponding to coastal basins from the Cess (or Nipoué, Ivory Coast) to the Pra (Ghana). These delimitations give an highly significant within region faunal homogeneity, even if the effect of geographical proximity between rivers is removed. 21 to 71% of the fish species in each regions are endemics. The present patterns of distribution are the result of past climatic and geological events affecting West Africa and, given this framework, the role of alternating wet and dry periods during the early quaternary is emphasized as well as the importance of mountains as dispersal barriers. Role of recent river connections and links via lagoon is emphasized in explaining river faunal similarities within biogeographical regions. (Résumé d'auteur)
Plan de classement
Dynamique de populations / modélisation [036EAUCON01]
Descripteurs
POISSON D'EAU DOUCE ; REPARTITION GEOGRAPHIQUE ; COURS D'EAU ; ESPECE ENDEMIQUE ; ANALYSE DE CORRESPONDANCE ; ZONE REFUGE
Description Géographique
AFRIQUE DE L'OUEST ; AFRIQUE CENTRALE ; ZONE SOUDANOSAHELIENNE
