La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Queensland northern quolls are not immune to cane toad toxin
Auteurs :	Beata Ujvari, Auteur ; Meri Oakwood, Auteur ; Thomas Madsen, Auteur
Type de document :	Article
Dans :	Wildlife Research (40(3) 2013)
Article en page(s) :	228-231
Langues:	Anglais
Résumé :	Context. The release of the highly toxic South American cane toad (Bufo marinus) to the toad-free Australian continent in 1935, and their subsequent rapid spread over large areas of tropical Australia, has resulted in a massive decline of predators such as yellow-spotted goannas (Varanus panoptes) and northern quolls (Dasyurus hallucatus). In spite of dramatic declines of northern quoll populations in the Northern Territory, a few populations still persist in areas of Queensland where northern quolls have co-existed with toads for several decades. Aims. To determine whether the remaining quoll populations in Queensland have evolved resistance to cane toad toxins. Methods. The extracellular H1-H2 domain of the alpha(1) subunit of the sodium-potassium-ATPase gene was sequenced in four Queensland as well as four Northern Territory quolls. The transcribed sodium-potassium-ATPase enzyme from this gene is specifically targeted by toad toxins. Key results. In all of the eight quolls, the sequences representing the

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