Näytä suppeat kuvailutiedot

dc.contributor.authorTschumi, Matthias
dc.contributor.authorHumbel, Jolanda
dc.contributor.authorNaef-Daenzer, Beat
dc.contributor.authorGrüebler, Martin
dc.date.accessioned2019-01-09T21:39:26Z
dc.date.available2019-01-09T21:39:26Z
dc.date.issued2018
dc.identifier.citationTschumi, M., Humbel, J., Naef-Daenzer, B. and Grüebler, M. (2018). Sex-biased survival of nestlings under unfavourable conditions drives secondary sex ratio in little owls (Athene noctua). 5th European Congress of Conservation Biology. doi: 10.17011/conference/eccb2018/107646
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/62041
dc.description.abstractIdentifying variation in key life history traits is crucial to predict population dynamics of endangered species. An increased bias in sex ratio as a result of low habitat quality can reinforce population decline and drive small populations to extinction. This is particularly true for monogamous bird species such as the little owl (Athene noctua). However, the underlying mechanisms driving biased sex ratios often remain elusive. Using a robust sample of molecular sex determination data recorded at two nest visits within each of 247 broods we examined the development in brood sex ratio, sexual size dimorphism and factors affecting the survival of little owl nestlings. Brood sex ratio in little owl broods was female-biased at fledging but not before the middle of the nestling period and it was female-biased at the end but not at the beginning of the breeding season. Female nestlings showed higher body mass than male nestlings of the same hatching rank. A survival analysis corroborated that late-hatched nestlings of low body mass showed reduced survival under adverse habitat conditions, resulting in a male-biased nestling mortality. Our conclusions therefore support theoretical predictions according to which the more sensitive sex will be disproportionally affected by unfavourable conditions that were previously identified by feeding experiments in the study system. This pattern of condition-dependent secondary brood sex ratio can severely affect the demographic parameters of endangered species and provides important implications for conservation.
dc.format.mimetypetext/html
dc.language.isoeng
dc.publisherOpen Science Centre, University of Jyväskylä
dc.relation.urihttps://peerageofscience.org/conference/eccb2018/107646/
dc.rightsCC BY 4.0
dc.titleSex-biased survival of nestlings under unfavourable conditions drives secondary sex ratio in little owls (Athene noctua)
dc.typeArticle
dc.type.urihttp://purl.org/eprint/type/ConferenceItem
dc.identifier.doi10.17011/conference/eccb2018/107646
dc.type.coarconference paper not in proceedings
dc.description.reviewstatuspeerReviewed
dc.type.versionpublishedVersion
dc.rights.copyright© the Authors, 2018
dc.rights.accesslevelopenAccess
dc.type.publicationconferenceObject
dc.relation.conferenceECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland
dc.format.contentfulltext
dc.rights.urlhttp://creativecommons.org/licenses/by/4.0/


Aineistoon kuuluvat tiedostot

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Aineisto kuuluu seuraaviin kokoelmiin

  • ECCB 2018 [712]
    5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland

Näytä suppeat kuvailutiedot

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