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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The genetic legacy of Lonesome George survives: Giant tortoises with Pinta Island ancestry identified in Galapagos
Auteurs :	Danielle L. Edwards, Auteur ; Edgar Benavides, Auteur ; Ryan C. Garrick, Auteur ; James P. Gibbs, Auteur ; Michael A. Russello, Auteur ; Kirstin B. Dion, Auteur ; Chaz Hyseni, Auteur ; Joseph P. Flanagan, Auteur ; Washington Tapia, Auteur ; Adalgisa Caccone, Auteur
Type de document :	Article
Dans :	Biological Conservation (157 JAN 2013)
Article en page(s) :	225-228
Langues:	Anglais
Résumé :	The death of Lonesome George, the last known purebred individual of Chelonoidis abingdoni native to Pinta Island, marked the extinction of one of 10 surviving giant tortoise species from the Galapagos Archipelago. Using a DNA reference dataset including historical C abingdoni and >1600 living Volcano Wolf tortoise samples, a site on Isabela Island known to harbor hybrid tortoises, we discovered 17 individuals with ancestry in C abingdoni. These animals belong to various hybrid categories, including possible first generation hybrids, and represent multiple, unrelated individuals. Their ages and relative abundance suggest that additional hybrids and conceivably purebred C. abingdoni individuals still occur on Volcano Wolf. Spatial analyses suggest locations where additional individuals with C abingdoni ancestry are most likely to be recovered, consistent with historical records of human movement of tortoises. These results provide an opportunity for species recovery of Pinta Island tortoises using individuals with C abingdoni ancestry. (C) 2012 Elsevier Ltd. All rights reserved.

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