Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/7968
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dc.contributor.authorMcDonald, Paulen
dc.contributor.authorOlsen, PDen
dc.contributor.authorCockburn, Aen
dc.date.accessioned2011-07-11T09:37:00Z
dc.date.issued2005en
dc.identifier.citationBehavioral Ecology, 16(1), p. 48-56en
dc.identifier.issn1465-7279en
dc.identifier.issn1045-2249en
dc.identifier.urihttps://hdl.handle.net/1959.11/7968en
dc.description.abstractAn overabundance of hypotheses have been proposed to account for reversed sexual size dimorphism (RSD; females the larger sex) in raptors. Previous research principally focused on examining interspecific patterns of RSD, rarely testing predictions of various hypotheses within populations. To redress this, we used data from both sexes of a large brown falcon, 'Falco berigora', population to evaluate the importance of size and body condition indices on the hunting prowess of males and the reproductive success, recruitment, and survival probabilities of both sexes. Female-female competition for territorial vacancies was likely to be intense as the floating population was female-biased and intrasexual agonistic interactions were frequently observed. In this competitive population, larger adult females were more likely to be recruited, indicating directional selection favoring increased female body size. Furthermore, after recruitment larger females were more likely to successfully fledge offspring, providing a mechanism by which RSD is maintained in the population. In contrast, male recruitment was unrelated to either body size or condition indices. Smaller immature males more often held their territories (survived) over two breeding seasons than did their larger counterparts; however, they also took small prey more frequently, a diet related to poor reproductive success. We argue that, together, these results are indicative of selection favoring an increase in female body size and a reduction or maintenance in male body size. Of all the hypotheses proposed to account for the maintenance and evolution of RSD in raptors, this scenario is consistent only with the predictions of the intrasexual competition hypothesis.en
dc.languageenen
dc.publisherOxford University Pressen
dc.relation.ispartofBehavioral Ecologyen
dc.titleSelection on body size in a raptor with pronounced reversed sexual size dimorphism: are bigger females better?en
dc.typeJournal Articleen
dc.identifier.doi10.1093/beheco/arh118en
dc.subject.keywordsBehavioural Ecologyen
dc.subject.keywordsAnimal Behaviouren
local.contributor.firstnamePaulen
local.contributor.firstnamePDen
local.contributor.firstnameAen
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.emailpmcdon21@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20110630-185231en
local.publisher.placeUnited Kingdomen
local.format.startpage48en
local.format.endpage56en
local.peerreviewedYesen
local.identifier.volume16en
local.identifier.issue1en
local.title.subtitleare bigger females better?en
local.contributor.lastnameMcDonalden
local.contributor.lastnameOlsenen
local.contributor.lastnameCockburnen
dc.identifier.staffune-id:pmcdon21en
local.profile.orcid0000-0002-9541-3304en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:8141en
dc.identifier.academiclevelAcademicen
local.title.maintitleSelection on body size in a raptor with pronounced reversed sexual size dimorphismen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.description.statisticsepubsVisitors: 91<br />Views: 89<br />Downloads: 0en
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