An hypothesis to explain the linkage between kakapo (Strigops habroptilus) breeding and the mast fruiting of their food trees

Show simple item record Fidler, Andrew en Lawrence, SB en McNatty, KP en 2012-05-03T03:33:08Z en 2008-01-01 en
dc.identifier.citation Wildlife Research 35(1):1-7 01 Jan 2008 en
dc.identifier.issn 1035-3712 en
dc.identifier.uri en
dc.description.abstract An important goal in the intensive conservation management of New Zealand's critically endangered nocturnal parrot, kakapo (Strigops habroptilus), is to increase the frequency of breeding attempts. Kakapo breeding does not occur annually but rather correlates with 3-5-year cycles in 'mast' seeding/fruiting of kakapo food plants, most notably podocarps such as rimu (Dacrydium cupressinum). Here we advance a hypothetical mechanism for the linking of kakapo breeding with such 'mast' seeding/fruiting. The essence of the hypothesis is that exposure to low levels of dietary phyto-chemicals may, in combination with hepatic gene 'memory', sensitise egg yolk protein genes, expressed in female kakapo livers, to oestrogens derived from developing ovarian follicles. Only in those years when the egg yolk protein genes have been sufficiently 'pre-sensitised' by dietary chemicals do kakapo ovarian follicles develop to ovulation and egg-laying occurs. While speculative, this hypothesis is both physiologically and evolutionarily plausible and suggests both future research directions and relatively simple interventions that may afford conservation workers some influence over kakapo breeding frequency. en
dc.language English en
dc.publisher CSIRO PUBLISHING en
dc.relation.ispartofseries Wildlife Research en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.subject Science & Technology en
dc.subject Life Sciences & Biomedicine en
dc.subject Ecology en
dc.subject Zoology en
dc.subject Environmental Sciences & Ecology en
dc.subject NEW-ZEALAND en
dc.subject PHYTOESTROGENS en
dc.subject ESTROGEN en
dc.subject REPRODUCTION en
dc.subject PSITTACIFORMES en
dc.subject PREDATORS en
dc.subject INDUCTION en
dc.subject KINETICS en
dc.subject BIOLOGY en
dc.title An hypothesis to explain the linkage between kakapo (Strigops habroptilus) breeding and the mast fruiting of their food trees en
dc.type Journal Article en
dc.identifier.doi 10.1071/WR07148 en
pubs.issue 1 en
pubs.begin-page 1 en
pubs.volume 35 en
dc.rights.holder Copyright: CSIRO PUBLISHING en
pubs.end-page 7 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 342346 en
pubs.record-created-at-source-date 2012-04-18 en

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