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dc.date.accessioned2017-08-07T13:17:33Z
dc.date.available2017-08-07T13:17:33Z
dc.date.created2015-02-10T20:07:49Z
dc.date.issued2014
dc.identifier.citationBordier, Célia Saraux, Claire Viblanc, Vincent A. Gachot-Neveu, Helene Beaugey, Magali Le Maho, Yvon Le Bohec, Céline . Inter-annual variability of fledgling sex ratio in king penguins. PLoS ONE. 2014, 9(12)
dc.identifier.urihttp://hdl.handle.net/10852/56806
dc.description.abstractAs the number of breeding pairs depends on the adult sex ratio in a monogamous species with biparental care, investigating sex-ratio variability in natural populations is essential to understand population dynamics. Using 10 years of data (2000–2009) in a seasonally monogamous seabird, the king penguin (Aptenodytes patagonicus), we investigated the annual sex ratio at fledging, and the potential environmental causes for its variation. Over more than 4000 birds, the annual sex ratio at fledging was highly variable (ranging from 44.4% to 58.3% of males), and on average slightly biased towards males (51.6%). Yearly variation in sex-ratio bias was neither related to density within the colony, nor to global or local oceanographic conditions known to affect both the productivity and accessibility of penguin foraging areas. However, rising sea surface temperature coincided with an increase in fledging sex-ratio variability. Fledging sex ratio was also correlated with difference in body condition between male and female fledglings. When more males were produced in a given year, their body condition was higher (and reciprocally), suggesting that parents might adopt a sex-biased allocation strategy depending on yearly environmental conditions and/or that the effect of environmental parameters on chick condition and survival may be sex-dependent. The initial bias in sex ratio observed at the juvenile stage tended to return to 1∶1 equilibrium upon first breeding attempts, as would be expected from Fisher’s classic theory of offspring sex-ratio variation.en_US
dc.languageEN
dc.publisherPublic Library of Science (PLoS)
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleInter-annual variability of fledgling sex ratio in king penguinsen_US
dc.typeJournal articleen_US
dc.creator.authorBordier, Célia
dc.creator.authorSaraux, Claire
dc.creator.authorViblanc, Vincent A.
dc.creator.authorGachot-Neveu, Helene
dc.creator.authorBeaugey, Magali
dc.creator.authorLe Maho, Yvon
dc.creator.authorLe Bohec, Céline
cristin.unitcode185,15,29,50
cristin.unitnameCentre for Ecological and Evolutionary Synthesis
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1219851
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=PLoS ONE&rft.volume=9&rft.spage=&rft.date=2014
dc.identifier.jtitlePLoS ONE
dc.identifier.volume9
dc.identifier.issue12
dc.identifier.pagecount17
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0114052
dc.identifier.urnURN:NBN:no-59550
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn1932-6203
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/56806/2/journal.pone.0114052.PDF
dc.type.versionPublishedVersion
cristin.articleide114052


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