Australian Mammalogy Australian Mammalogy Society
Journal of the Australian Mammal Society
RESEARCH ARTICLE

Behaviour and survivorship of a dasyurid predator (Antechinus flavipes) in response to encounters with the toxic and invasive cane toad (Rhinella marina)

Wiebke Kämper A B D , Jonathan K. Webb A C , Mathew S. Crowther A , Matthew J. Greenlees A and Richard Shine A
+ Author Affiliations
- Author Affiliations

A School of Biological Sciences, University of Sydney, NSW 2006, Australia.

B Behavioural Biology, University of Leiden, 2300 RA Leiden, The Netherlands.

C School of the Environment, University of Technology Sydney, Broadway, NSW 2007, Australia.

D Corresponding author. Email: Wiebkekaemper@gmail.com

Australian Mammalogy 35(2) 136-143 https://doi.org/10.1071/AM12025
Submitted: 14 May 2012  Accepted: 6 September 2012   Published: 21 December 2012

Abstract

Australia’s biogeographical isolation has rendered many endemic species vulnerable to invaders. The recent spread of the cane toad (Rhinella marina) has caused serious population declines for some predatory reptile and mammal species. To determine a priori whether or not cane toad poisoning endangers native species, we can test the fates of predators in laboratory trials. We investigated whether an Australian marsupial whose range is increasingly being occupied by cane toads (the yellow-footed antechinus, Antechinus flavipes) is at risk of toad poisoning by testing (1) whether yellow-footed antechinuses approach or attack cane toads and, if so, whether they die as a result; and (2) if they survive, whether they then learn to avoid toads in subsequent encounters. We also investigated the effects of sympatry with toads on the feeding response. In all, 58% of antechinuses from eastern New South Wales approached or attacked a toad (over 4 or 5 opportunities to do so, on successive nights), and none showed ill effects after doing so. Antechinuses that attacked (killed or ingested) toads rapidly learnt to avoid them. Antechinuses from toad-exposed populations ingested more toad flesh, but otherwise reacted in the same ways as did conspecifics from toad-free areas. Hence, the yellow-footed antechinus is unlikely to face population declines via toad poisoning.

Additional keywords: invasive species, predator learning, taste aversion, toxic prey.


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