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dc.contributor.authorLefort, Marie-Caroline
dc.contributor.authorWorner, S.P.
dc.contributor.authorRostas, M.M.
dc.contributor.authorVereijssen, J.
dc.contributor.authorBoyer, Stephane
dc.description.abstractOccasionally, exotic plant introductions lead to the emergence of an invasive insect within its native geographical range. Such emergence could be explained by a pre-adaptation of the insect to break through the defences of the new encountered host. We investigated the fitness responses of two New Zealand endemic scarabs (Costelytra brunneum and C. zealandica) when given a diet of an exotic pasture species, Trifolium repens, whose defences were artificially triggered by the phytohormone jasmonic acid. We found differential fitness responses between the two species when they were exposed to a defence-induced diet. We observed a significant weight increase in the invasive species C. zealandica when it was fed with treated roots compared with untreated controls, whereas no significant weight increase was observed in the non-invasive C. brunneum compared with the control treatments. Our study suggests that C. zealandica has a pre-existing ability to tolerate the defence chemicals of its exotic host and, more interestingly, to benefit from them, which may explain why this species has become a serious pest of pasture throughout its native geographical range.en_NZ
dc.publisherNew Zealand Ecological Society Inc (NZES)en_NZ
dc.rightsAll text and images on this website and the content of all electronic files © 2004–2015. New Zealand Ecological Society, Inc. Any information viewed or downloaded from this website is subject to terms and conditions. The publication of the New Zealand Journal of Ecology is primarily funded by the individual and institutional members of the New Zealand Ecological Society. There are lots of benefits to being a member besides the journal.en_NZ
dc.subjectjasmonic aciden_NZ
dc.subjectTrifolium repens (Pasture species)en_NZ
dc.subjectCostelytra zealandica (Scarabaeidae: Melolonthinae)en_NZ
dc.subjectCostelytra brunneum (Broun),en_NZ
dc.subjectscarab beetlesen_NZ
dc.subjectfeeding preferencesen_NZ
dc.subjectgrass grubsen_NZ
dc.subjectNew Zealanden_NZ
dc.subjectplant-insect interactionsen_NZ
dc.subjectnative invadersen_NZ
dc.subjectinvasive speciesen_NZ
dc.titleResponding positively to plant defences, a candidate key trait for invasion success in in the New Zealand grass grub Costelytra zealandicaen_NZ
dc.typeJournal Articleen_NZ
dc.rights.holderNew Zealand Ecological Society Inc (NZES)en_NZ
dc.subject.marsden050103 Invasive Species Ecologyen_NZ
dc.identifier.bibliographicCitationLefort, M-C., Worner, S. P., Rostas, M., Vereijsen, J., & Boyer, S. (2014). Responding positively to plant defences, a candidate key trait for invasion success in in the New Zealand grass grub Costelytra zealandica. New Zealand Journal of Ecology, 39(1), pp.128-132.
unitec.institutionUnitec Institute of Technologyen_NZ
unitec.institutionBio-Protection Research Centre (Lincoln, N.Z.)en_NZ
unitec.institutionLincoln Universityen_NZ
unitec.institutionNew Zealand Institute for Plant & Food Research Limited (Christchurch, N.Z.)en_NZ
unitec.publication.titleNew Zealand Journal of Ecologyen_NZ
unitec.institution.studyareaNatural Sciences

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