Intraspecific variation in the foraging ecology of kea, the world's only mountain- and rainforest-dwelling parrot

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dc.contributor.authorGreer AL
dc.contributor.authorGajdon GK
dc.contributor.authorNelson XJ
dc.date.accessioned2019-10-30T22:47:16Z
dc.date.available2019-10-30T22:47:16Z
dc.date.issued2015en
dc.date.updated2019-07-28T07:57:33Z
dc.description.abstract© New Zealand Ecological Society. Intraspecific variation can have important knock-on effects on population dynamics and ecosystem processes. There are good indicators that intraspecific differences may exist in the foraging ecology of kea parrots (Nestor notabilis). Kea breed in two markedly different habitats (alpine and temperate rainforest), and have pronounced sexual size dimorphism of their upper bill, which may indicate niche partitioning between the sexes. Additionally, as a long-lived species, they can potentially acquire a vast amount of information regarding food sources within their environment, suggesting variation between age classes. We used field observations and faecal analysis to investigate the foraging ecology of kea. We found evidence of invertebrate foraging significantly more frequently in temperate rainforest than in alpine regions, where kea foraged more frequently on fruit. In the alpine habitat, kea fed mainly on fruit during summer and autumn, changing primarily to leaves during winter and spring and increasing invertebrate consumption in springtime. Although there was no discernible impact of sex, we found that adult males foraged more on roots and invertebrates than immature kea, possibly because they were able to exploit a more varied diet through experience. Future research should investigate the relationship between invertebrate foraging and breeding ecology in kea.en
dc.identifier.citationGreer AL, Gajdon GK, Nelson XJ (2015). Intraspecific variation in the foraging ecology of kea, the world's only mountain- and rainforest-dwelling parrot. New Zealand Journal of Ecology. 39(2). 254-261.en
dc.identifier.issn0110-6465
dc.identifier.issn1177-7788
dc.identifier.urihttp://hdl.handle.net/10092/17525
dc.languageEnglish
dc.language.isoen
dc.publisherNEW ZEALAND ECOL SOCen
dc.relation.urihttps://newzealandecology.org/nzje/3232
dc.subjectbehavioural ecologyen
dc.subjectbirden
dc.subjectdieten
dc.subjectNestor notabilisen
dc.subjectniche partitioningen
dc.subjectontogenyen
dc.subjectPsittaciformesen
dc.subject.anzsrcFields of Research::31 - Biological sciences::3109 - Zoology::310901 - Animal behaviouren
dc.subject.anzsrcFields of Research::31 - Biological sciences::3109 - Zoology::310907 - Animal physiological ecologyen
dc.titleIntraspecific variation in the foraging ecology of kea, the world's only mountain- and rainforest-dwelling parroten
dc.typeJournal Articleen
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