L'essaim d'especes Bathyclarias-Clarias, un nouveau modele pour comprendre les speciations rapides dans les grands lacs africains

Publication Type:Journal Article
Year of Publication:2001
Authors:J. F. Agnese, Teugels G. G.
Journal:Comptes Rendus de l'Academie des Sciences Serie III Sciences de la Vie
Date Published:[print] Aout, 20
Accession Number:200100422104
Keywords:adaptation-mechanisms; phylogenetic-relationships; speciation-rates; species-flocks, Animals-; Chordates-; Fish-; Nonhuman-Vertebrates; Vertebrates-, Bathyclarias-euryodon (Osteichthyes-): Claridae-; Bathyclarias-gigas (Osteichthyes-): Claridae-; Bathyclarias-ilesi (Osteichthyes-): Claridae-; Bathyclarias-longibarbis (Osteichthyes-): Claridae-; Bathyclarias-nyaensis (Osteichthyes-): Claridae-; Bathyc, Lake-Malawi (Ethiopian-region), Molecular-Genetics (Biochemistry-and-Molecular-Biophysics); Evolution-and-Adaptation; Systematics-and-Taxonomy, Osteichthyes-: Pisces-, Vertebrata-, Chordata-, Animalia-

Phylogenetic relationships between seven species of the catfish species flock from Lake Malawi (genus Bathyclarias) and other Clariid catfish have been investigated using cytochrome b partial sequences. Here we demonstrate that this species flock originated from a widespread, generalist species, Clarias gariepinus, still occurring in the lake. Bathyclarias species and their ancestor C. gariepinus form a simple model that can be used to understand the mechanisms of adaptation and rapid speciation in African Great lakes.

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