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dc.contributor.author
Cueto, Victor
dc.contributor.author
Bravo, Susana Patricia
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Trujillo Arias, Natalia
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Cabanne, Gustavo Sebastián
dc.date.available
2016-05-10T20:41:35Z
dc.date.issued
2015-02
dc.identifier.citation
Cueto, Victor; Bravo, Susana Patricia; Trujillo Arias, Natalia; Cabanne, Gustavo Sebastián; Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis); Sociedad Brasileira de Ornitologia; Revista Brasileira de Ornitologia; 23; 1; 2-2015; 18-24
dc.identifier.issn
0103-5657
dc.identifier.uri
http://hdl.handle.net/11336/5616
dc.description.abstract
White-crested Elaenia (Elaenia albiceps chilensis) is a Neotropical austral migrant that is sexually monomorphic in plumage. We first determined whether the brood patch and cloacal protuberance are good indicators of an individual´s sex by comparing these characters with individuals sexed using molecular techniques. Second, at several localities encompassing a 1500 km latitudinal gradient across the breeding range, we evaluated whether morphological measurements can be used for sex determination, using discriminant analysis and molecular sexing as dependent variables. Finally, the effectiveness of the discriminant analysis was assessed by a Jackknifed validation, and by a cross-validation process through the classification of a new sample. Sexing using genetic techniques and by cloacal protuberance size and presence of the brood patch produced the same results. We did not find differences in body measurements among study sites. In all localities, males were significantly larger than females in wing and tail lengths, whereas other variables did not exhibit differences between sexes. The best classification of sex by discriminant functions was obtained by including wing and tail length as discriminatory variables. The discriminant function correctly determined the sex of 86 % of all samples, with correct identification of 90 % of males and 75 % of females. The Jackknifed validation and cross-validation of a new sample resulted in similar sex classifications as those produced using the discriminant function. Discriminant analysis thus represented a simple and cost-efficient way to determine the sex of White-crested Elaenias for field ornithologists.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Sociedad Brasileira de Ornitologia
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Aves
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Migracion
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Determinacion del Sexo
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-04-28T14:50:54Z
dc.journal.volume
23
dc.journal.number
1
dc.journal.pagination
18-24
dc.journal.pais
Brasil
dc.journal.ciudad
Pelotas
dc.description.fil
Fil: Cueto, Victor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagónicas; Argentina
dc.description.fil
Fil: Bravo, Susana Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagónicas; Argentina
dc.description.fil
Fil: Trujillo Arias, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina
dc.description.fil
Fil: Cabanne, Gustavo Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina
dc.journal.title
Revista Brasileira de Ornitologia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/2015_1
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