title: Deadly intentions: naïve introduced foxes show rapid attraction to odour cues of an unfamiliar native prey.
abstract: Introduced predators have caused declines and extinctions of native species worldwide, seemingly able to find and hunt new, unfamiliar prey from the time of their introduction. Yet, just as native species are often naïve to introduced predators, in theory, introduced predators should initially be naïve in their response to novel native prey. Here we examine the response of free-living introduced red foxes (Vulpes vulpes) to their first encounter with the odour cues of a novel native prey, the long-nosed bandicoot (Perameles nasuta). Despite no experience with bandicoots at the study site, foxes were significantly more interested in bandicoot odour compared to untreated controls and to a co-evolved prey, the black rat (Rattus rattus). So what gives introduced predators a novelty advantage over native prey? Such neophilia towards novel potential food sources carries little costs, however naïve native prey often lack analogous neophobic responses towards novel predators, possibly because predator avoidance is so costly. We propose that this nexus between the costs and benefits of responding to novel information is different for alien predators and native prey, giving alien predators a novelty advantage over native prey. This may explain why some introduced predators have rapid and devastating impacts on native fauna.
authors.affiliation: School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia.|School of Biological, Earth and Environmental Sciences, The University of New South Wales, Randwick, NSW 2052, Australia.
authors.forename: Jenna P
authors.initials: JP
authors.lastname: Bytheway
authors.affiliation: School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia.|School of Biological, Earth and Environmental Sciences, The University of New South Wales, Randwick, NSW 2052, Australia.
authors.forename: Catherine J
authors.initials: CJ
authors.lastname: Price
authors.affiliation: School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia.|School of Biological, Earth and Environmental Sciences, The University of New South Wales, Randwick, NSW 2052, Australia.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Banks
mesh_terms: D000818:Animals; D003463:Cues; D020387:Food Chain; D005589:Foxes / Q000502:physiology*; D058865:Introduced Species; D051189:Murinae / Q000502:physiology*; D009812:Odorants; D011157:Population Dynamics; D011235:Predatory Behavior / Q000502:physiology*