Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/7489
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dc.contributor.authorMcDonald, Paulen
dc.contributor.authorEwen, John Gen
dc.contributor.authorWright, Jonathanen
dc.date.accessioned2011-05-19T14:41:00Z-
dc.date.issued2010-
dc.identifier.citationAnimal Behaviour, 79(1), p. 243-250en
dc.identifier.issn1095-8282en
dc.identifier.issn0003-3472en
dc.identifier.urihttps://hdl.handle.net/1959.11/7489-
dc.description.abstractAmong vertebrates, particularly birds, evidence for facultative adjustment of brood sex ratios is inconsistent. Results from cooperatively breeding species are clearer, where sex-biased dispersal and helping behaviour may accentuate any differences in fitness payoffs to parents of raising sons versus daughters. We might expect similar payoff differences for cooperative helpers raising offspring of each sex, but this has rarely been tested. Bell miners, 'Manorina melanophrys', are known to adjust their primary brood sex ratio according to habitat productivity. Helpers of both sexes provision broods even when unrelated to offspring, which indicates the potential importance of direct fitness benefits (e.g. group augmentation) that should depend heavily on offspring sex. As only females disperse, we anticipated helpers would invest more heavily in male-biased broods, particularly if they were unrelated to broods and thus not gaining indirect benefits. Helpers did feed all-male broods at a greater rate, although, contrary to expectations, this was the result of higher levels of effort by related and not unrelated helpers, irrespective of helper sex. The subsequent interaction between relatedness and brood sex ratio was also an exclusively between-subjects effect, and not due to any within-subject facultative adjustment by individual helpers feeding at multiple nests. Furthermore, the acoustic characteristics of nestling begging calls showed no reliable sex differences; thus helpers probably lacked accurate information on nestling sex to make facultative adjustments according to brood sex ratio. Additional work examining these kinds of trade-offs in other cooperative species where sons and daughters yield differing payoffs to helpers is warranted.en
dc.languageenen
dc.publisherElsevier Ltden
dc.relation.ispartofAnimal Behaviouren
dc.titleBrood sex ratio does not affect helper effort in a cooperative bird, despite extreme sex-biased dispersalen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.anbehav.2009.11.007en
dc.subject.keywordsBehavioural Ecologyen
dc.subject.keywordsAnimal Behaviouren
local.contributor.firstnamePaulen
local.contributor.firstnameJohn Gen
local.contributor.firstnameJonathanen
local.subject.for2008060201 Behavioural Ecologyen
local.subject.for2008060801 Animal Behaviouren
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolScience and Technologyen
local.profile.schoolScience and Technologyen
local.profile.emailpmcdon21@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20110321-141939en
local.publisher.placeUnited Kingdomen
local.format.startpage243en
local.format.endpage250en
local.identifier.scopusid72149101233en
local.peerreviewedYesen
local.identifier.volume79en
local.identifier.issue1en
local.contributor.lastnameMcDonalden
local.contributor.lastnameEwenen
local.contributor.lastnameWrighten
dc.identifier.staffune-id:pmcdon21en
local.profile.orcid0000-0002-9541-3304en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:7657en
dc.identifier.academiclevelAcademicen
local.title.maintitleBrood sex ratio does not affect helper effort in a cooperative bird, despite extreme sex-biased dispersalen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorMcDonald, Paulen
local.search.authorEwen, John Gen
local.search.authorWright, Jonathanen
local.uneassociationUnknownen
local.year.published2010en
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