Is natural selection promoting sexual dimorphism in the Green-backed Firecrown Hummingbird (<i>Sephanoides Sephaniodes</i>)?

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dc.contributor.authorGonzalez-Gomez, Paulina L.
dc.contributor.authorEstades, Cristian F.
dc.date.accessioned2025-01-21T00:09:24Z
dc.date.available2025-01-21T00:09:24Z
dc.date.issued2009
dc.description.abstractIn many hummingbird species there is an opposite pattern of sexual dimorphism in bill length and other morphometric measures of body size. These differences seem to be closely related with differences in foraging ecology directly associated with a different resource exploitation strategy. The aim of this study was to assess if natural selection is acting on wing length and bill size in hummingbird males and females with different resource exploitation strategies (i.e., territorial males and non-territorial females). If competition for resources promotes sexual dimorphism as a selective pressure, males should be subjected to negative directional selection pressure for wing length and no selection pressure over bill size, while females should undergo positive directional selection pressure for both bill size and wing length. The morphometric data we collected suggests that there is no selection for wing length and bill size in male hummingbirds. In contrast, our females exhibited positive directional selection for both wing length and bill size. Although we cannot reject sexual selection acting on sexually dimorphic traits, this study suggests that natural selection may promote sexual dimorphism in traits that are closely related with hummingbird foraging ecology and resource exploitation strategies.
dc.description.funderFondecyt
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10336-008-0356-0
dc.identifier.eissn1439-0361
dc.identifier.issn0021-8375
dc.identifier.urihttps://doi.org/10.1007/s10336-008-0356-0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95707
dc.identifier.wosidWOS:000264043500005
dc.issue.numero2
dc.language.isoen
dc.pagina.final356
dc.pagina.inicio351
dc.revistaJournal of ornithology
dc.rightsacceso restringido
dc.subjectHummingbirds
dc.subjectPhenotypic selection
dc.subjectSexual dimorphism
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleIs natural selection promoting sexual dimorphism in the Green-backed Firecrown Hummingbird (<i>Sephanoides Sephaniodes</i>)?
dc.typeartículo
dc.volumen150
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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