الفهرس 
Introduction& Review of LiteratureOnly 14 pages are availabe for public view
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Abstract
Catfishes of the River Nile represent one of the most peculiar fish
groups in Africa. They provide a versatile milieu for genetic, ecological, and
economic applications. Many of them are, till now, subjected to taxonomic
argumentation. The sturdy, resilient, and extremely tolerant North African
sharp tooth catfish Clarias gariepinus (Family: Clariidae) has been
introduced to many areas in the world for aquaculture. Herein, we provide
the first North African mitochondrial phylogenetic analysis for the
commonest commercial North African siluriformes, and detailed genetic
population analysis for C. gariepinus. Samples of common northern River
Nile siluriform species were collected for phylogenetic correlations, namely
C. gariepinus, Bagrus bajad and Chysichthys auratus (Bagridae), and
Malapterurus electricus (Malapteruridae). They wereall subjected to DNA
barcoding.Moreover, C. gariepinus samples werecollected from the
Egyptian River Nile in Aswan, Assiut, and Shebin El-Kom cities. The results
indicated a potent phylogenetic proximity betweenC. gariepinusand M.
electricus from one side, and B. bajad and C. auratus from the other. Also,
there was a clearly low genetic diversity of C. gariepinus in the Nile and the
world in general. Finally, a clear connectivity pattern could be identified for
the spread of C. gariepinus from Africa as the major hot spot for species
haplotype diversity, to Asia and South as the key world recipients. The
results could provide an insight on the role of dispersal in enhancing
species diversity, rather than a shallow pattern of genetic mixing in its
natural habitat.