A preliminary study of allozyme differences amongst Carcharhinus sharks from the continental slope near Abidjan, Côte d'lvoire

Authors: Adepo-Gourène, Béatrice; Chikhi, Lounès; Agnèse, Jean-François; Gourène, Germain; Hervé, Alain

Source: African Journal of Aquatic Science, Volume 32, Number 3, November 2007 , pp. 305-310(6)

Publisher: NISC Pty Ltd

Key:

- Free Content

- New Content

- Subscribed Content

- Free Trial Content

Abstract:

Genetic variability of fifty-five shark specimens from the genus Carcharhinus was analysed using 18 allozyme loci. Sixteen loci were polymorphic either within, or between, species. Levels of genetic polymorphism, as measured by observed heterozygosity values, ranged from 0.008 (±0.008) to 0.056 (±0.038). Nei's (1978) genetic distances between Carcharhinus species ranged from 0.235 to 0.784. Morphological identification, using keys, classified them as members of four morphological groups, corresponding to four species: Carcharhinus signatus, C. brevipinna, C. longimanus and C. limbatus. Genetic data confirmed that the first three species were correctly identified, but that the C. limbatus individuals could be further divided into two clearly-differentiated groups, one of which is probably C. limbatus, whereas the other could either be misidentified or be a new taxon.

Keywords: ALLOZYME DIFFERENTIATION; FIXED ALLELE DIFFERENCES; GENETIC VARIATION; SHARKS; SPECIES IDENTIFICATION; WEST AFRICA

Document Type: Research article

DOI: 10.2989/AJAS.2007.32.3.11.310

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$15.00 plus tax Refund Policy