Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis)
- Autores
- Cueto, Victor; Bravo, Susana Patricia; Trujillo Arias, Natalia; Cabanne, Gustavo Sebastián
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
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
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
Fil: Trujillo Arias, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina
Fil: Cabanne, Gustavo Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina - Materia
-
AVES
MIGRACION
DETERMINACION DEL SEXO - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/5616
Ver los metadatos del registro completo
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spelling |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis)Cueto, VictorBravo, Susana PatriciaTrujillo Arias, NataliaCabanne, Gustavo SebastiánAVESMIGRACIONDETERMINACION DEL SEXOhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1White-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.Fil: Cueto, Victor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagónicas; ArgentinaFil: Bravo, Susana Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagónicas; ArgentinaFil: Trujillo Arias, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaFil: Cabanne, Gustavo Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaSociedad Brasileira de Ornitologia2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/mswordapplication/pdfhttp://hdl.handle.net/11336/5616Cueto, 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; 18-240103-5657enginfo:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/2015_1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:07:17Zoai:ri.conicet.gov.ar:11336/5616instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:07:18.174CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
title |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
spellingShingle |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) Cueto, Victor AVES MIGRACION DETERMINACION DEL SEXO |
title_short |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
title_full |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
title_fullStr |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
title_full_unstemmed |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
title_sort |
Sex determination by morphometry of adult White-crested Elaenia (Elaenia albiceps chilensis) |
dc.creator.none.fl_str_mv |
Cueto, Victor Bravo, Susana Patricia Trujillo Arias, Natalia Cabanne, Gustavo Sebastián |
author |
Cueto, Victor |
author_facet |
Cueto, Victor Bravo, Susana Patricia Trujillo Arias, Natalia Cabanne, Gustavo Sebastián |
author_role |
author |
author2 |
Bravo, Susana Patricia Trujillo Arias, Natalia Cabanne, Gustavo Sebastián |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
AVES MIGRACION DETERMINACION DEL SEXO |
topic |
AVES MIGRACION DETERMINACION DEL SEXO |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
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. 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 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 Fil: Trujillo Arias, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina Fil: Cabanne, Gustavo Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; Argentina |
description |
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. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/5616 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 0103-5657 |
url |
http://hdl.handle.net/11336/5616 |
identifier_str_mv |
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 0103-5657 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www4.museu-goeldi.br/revistabrornito/revista/index.php/BJO/article/view/2015_1 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/msword application/pdf |
dc.publisher.none.fl_str_mv |
Sociedad Brasileira de Ornitologia |
publisher.none.fl_str_mv |
Sociedad Brasileira de Ornitologia |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613931728896000 |
score |
13.070432 |