The distribution and trophic ecology of an introduced, insular population of red-necked wallabies (Notamacropus rufogriseus)

dc.contributor.authorHavlin, Paige
dc.contributor.authorCaravaggi, Anthony
dc.contributor.authorMontgomery, W. Ian
dc.contributor.funderManx BirdLife
dc.contributor.funderManx Wildlife Trust
dc.description.abstractIntroduced non-native mammals can have negative impacts on native biota and it is important that their ecologies are quantified so that potential impacts can be understood. Red-necked wallabies (Notamacropus rufogriseus (Desmarest, 1817)) became established on the Isle of Man (IOM), an island with UNESCO Biosphere status, following their escape from zoological collections in the mid-1900s. We estimated wallaby circadial activity and population densities using camera trap surveys and random encounter models. Their range in the IOM was derived from public sightings sourced via social media. Wallaby diet and niche breadth were quantified via microscopic examination of faecal material and compared with those of the European hare (Lepus europaeus Pallas, 1778). The mean (+/- SE) population density was 26.4 +/- 6.9 wallabies/km(2), the mean (+/- SE) population size was 1742 +/- 455 individuals, and the species' range was 282 km(2), comprising 49% of the island. Wallaby diets were dominated by grasses, sedges, and rushes; niche breadth of wallabies and hares (0.55 and 0.59, respectively) and overlap (0.60) suggest some potential for interspecific competition and (or) synergistic impacts on rare or vulnerable plant species. The IOM wallaby population is understudied and additional research is required to further describe population parameters, potential impacts on species of conservation interest, and direct and indirect economic costs and benefits.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.identifier.citationHavlin, P., Caravaggi, A. and Montgomery, W. I. (2017) 'The distribution and trophic ecology of an introduced, insular population of red-necked wallabies (Notamacropus rufogriseus)', Canadian Journal of Zoology, 96(4), pp. 357-365. doi: 10.1139/cjz-2017-0090en
dc.identifier.journaltitleCanadian Journal of Zoologyen
dc.publisherCanadian Society of Zoologistsen
dc.rights© 2018, the Authors. Published by Canadian Science Publishing on behalf of the Canadian Society of Zoologists. All rights reserved. This document is the Accepted Manuscript version of a Published Work that appeared in final form in the Canadian Journal of Zoology. To access the final edited and published work see
dc.subjectNon-native speciesen
dc.subjectPopulation densityen
dc.subjectRed-necked wallabyen
dc.subjectNotamacropus rufogriseusen
dc.subjectEuropean hareen
dc.subjectLepus europaeusen
dc.titleThe distribution and trophic ecology of an introduced, insular population of red-necked wallabies (Notamacropus rufogriseus)en
dc.typeArticle (peer-reviewed)en
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