Genetic diversity and gene flow in Clarias gariepinus from Lakes Victoria and Kanyaboli, Kenya

Show simple item record Abila, Romulus O. Barasa, J. E. Grobler, J. P. Dangasuk, O. G. Njahira, M. N. Kaunda-Arara, B. 2015-02-19T12:33:18Z 2015-02-19T12:33:18Z 2014
dc.identifier.citation African Journal of Aquatic Science Volume 39, Issue 3, 2014 en_US
dc.identifier.issn 1608-5914
dc.description DOI: 10.2989/16085914.2014.933734 en_US
dc.description.abstract The African catfish Clarias gariepinus is an important species in the rapidly expanding aquaculture industry in East Africa. Most Kenyan catfish farmers use stocks with unknown genetic characteristics, with uncertified seeds and inter-basin exchange of brood stocks threatening the genetic distinctness of wild populations. Using 346 base pairs of D-loop sequence variation, genetic diversity and gene flow between C. gariepinus populations from Lake Victoria and its satellite, Lake Kanyaboli, were explored. A total of 17 haplotypes were identified in 52 individuals sampled, with the two populations sharing four haplotypes, and one haplotype being the most frequent (50%) in both populations. Catfish from Lake Victoria showed marginally higher genetic variation compared to those from Lake Kanyaboli, reflected in the higher number of haplotypes, singletons, polymorphic sites and haplotype and nucleotide diversities. Yet neither population showed signs of significant loss of diversity compared to other wild populations of the species. Clarias gariepinus from Lakes Victoria and Kanyaboli clustered into one clade, showing low population structuring and with a between-population FST value of 0.026, which was not indicative of significant (p ≥ 0.05) differentiation between the two lakes. Nevertheless, each population contained 60–64% of unique haplotypes. Inter-basin transfer of Clarias populations and human impact on Lake Kanyaboli should be controlled to conserve the unique Clarias genetic resources in the lake basin of Kenya. en_US
dc.language.iso en en_US
dc.publisher Taylor & Francis en_US
dc.subject African catfish en_US
dc.subject conservation en_US
dc.subject genetic variation en_US
dc.subject haplotype en_US
dc.subject population differentiation en_US
dc.title Genetic diversity and gene flow in Clarias gariepinus from Lakes Victoria and Kanyaboli, Kenya en_US
dc.type Article en_US

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