dc.contributorMaldonado-Chaparro, Adriana A.
dc.creatorRobayo Salek, Andrés Felipe
dc.date.accessioned2022-08-26T22:24:53Z
dc.date.accessioned2022-09-22T14:33:44Z
dc.date.available2022-08-26T22:24:53Z
dc.date.available2022-09-22T14:33:44Z
dc.date.created2022-08-26T22:24:53Z
dc.identifierhttps://repository.urosario.edu.co/handle/10336/34812
dc.identifierhttps://doi.org/10.48713/10336_34812
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3440018
dc.description.abstractThe extent to which males and females of monomorphic species differ from each other is still an ecological and evolutionary puzzle. In these species it has been proposed that slight differences in selection pressures can result in phenotypic differences between sexes. However, such differences may be very subtle or may be exhibited in traits that are not perceived by humans, such as coloration. For example, in blue tits (Cyanistes caeruleus) males differ from females in the UV reflection of the crown patch. Here, I aimed to identify the morphological differences between sexes in a monomorphic specie, the oilbird (Steatornis caripensis). In this species, males are slightly larger and grayish than females, making it difficult to determine the sex of individuals by means other than molecular sexing, an invasive technique. To characterize phenotypic differences between males and females, I measured five morphological traits on 75 museum individuals and 16 wild individuals, and the feather coloration in 33 museum individuals and 11 wild individuals. I used these measures to quantify the degree of sexual dimorphism and identify the traits that differentiate males from females. I found that S. caripensis is mostly monomorphic showing subtle differences in the width and the length of the bill, which is larger in males compared to females. I also found subtle differences in plumage coloration suggesting that color may play an important role in the differentiation of the sexes, and possibly in mate choice. My results indicate that despite the slight differences in beak shape between males and females, the sexes in oilbirds seem to be indistinguishable.
dc.languageeng
dc.publisherUniversidad del Rosario
dc.publisherBiología
dc.publisherFacultad de Ciencias Naturales
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/2.5/co/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightsAbierto (Texto Completo)
dc.rightsEL AUTOR, manifiesta que la obra objeto de la presente autorización es original y la realizó sin violar o usurpar derechos de autor de terceros, por lo tanto la obra es de exclusiva autoría y tiene la titularidad sobre la misma.
dc.rightsAtribución-NoComercial-SinDerivadas 2.5 Colombia
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dc.sourceinstname:Universidad del Rosario
dc.sourcereponame:Repositorio Institucional EdocUR
dc.subjectSelección sexual
dc.subjectEspecies monomórficas
dc.subjectSexado molecular
dc.titleCharacterization of the sexual dimorphism in oilbirds (Steatornis caripensis)
dc.typebachelorThesis


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