The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis

Autores
Montalti, Diego; Graña Grilli, Maricel; Maragliano, René E.; Cassini, Guillermo Hernán
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Monomorphic birds cannot be sexed visually and discriminant functions on the basis of external morphological variations are frequently used. Our objective was to evaluate the reliability of sex classification functions created from structural measurements of Chilean flamingos Phoenicopterus chilensis museum skins for the gender assignment of live birds. Five meas-urements were used to develop four discriminant functions: culmen, bill height and width, tarsus length and middle toe claw. The functions were tested on a sample of live flamingos from a zoo. The best classification for museum flamingos was given by a function using tarsus length, bill width and middle toe claw (97%). However, this function did not give the best classification for the zoo-based flamingos (81%) which had the best sex assignment by a function including measurements of tarsus, culmen and bill height and width (85%). This shows that a function giving good results in the sample from which it originated may not be as good when applied to another group of animals. Our study emphasizes the need for assessing the accuracy of a function by testing it with other methods to ensure its suitability when being applied.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Discriminant function
Morphometrics
Sex classification
Sexual dimorphism
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/83936

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spelling The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensisMontalti, DiegoGraña Grilli, MaricelMaragliano, René E.Cassini, Guillermo HernánCiencias NaturalesDiscriminant functionMorphometricsSex classificationSexual dimorphismMonomorphic birds cannot be sexed visually and discriminant functions on the basis of external morphological variations are frequently used. Our objective was to evaluate the reliability of sex classification functions created from structural measurements of Chilean flamingos <i>Phoenicopterus chilensis</i> museum skins for the gender assignment of live birds. Five meas-urements were used to develop four discriminant functions: culmen, bill height and width, tarsus length and middle toe claw. The functions were tested on a sample of live flamingos from a zoo. The best classification for museum flamingos was given by a function using tarsus length, bill width and middle toe claw (97%). However, this function did not give the best classification for the zoo-based flamingos (81%) which had the best sex assignment by a function including measurements of tarsus, culmen and bill height and width (85%). This shows that a function giving good results in the sample from which it originated may not be as good when applied to another group of animals. Our study emphasizes the need for assessing the accuracy of a function by testing it with other methods to ensure its suitability when being applied.Facultad de Ciencias Naturales y Museo2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf851-855http://sedici.unlp.edu.ar/handle/10915/83936enginfo:eu-repo/semantics/altIdentifier/issn/1674-5507info:eu-repo/semantics/altIdentifier/doi/10.1093/czoolo/58.6.851info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:05Zoai:sedici.unlp.edu.ar:10915/83936Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:05.632SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
title The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
spellingShingle The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
Montalti, Diego
Ciencias Naturales
Discriminant function
Morphometrics
Sex classification
Sexual dimorphism
title_short The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
title_full The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
title_fullStr The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
title_full_unstemmed The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
title_sort The reliability of morphometric discriminant functions in determining the sex of Chilean flamingos Phoenicopterus chilensis
dc.creator.none.fl_str_mv Montalti, Diego
Graña Grilli, Maricel
Maragliano, René E.
Cassini, Guillermo Hernán
author Montalti, Diego
author_facet Montalti, Diego
Graña Grilli, Maricel
Maragliano, René E.
Cassini, Guillermo Hernán
author_role author
author2 Graña Grilli, Maricel
Maragliano, René E.
Cassini, Guillermo Hernán
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Discriminant function
Morphometrics
Sex classification
Sexual dimorphism
topic Ciencias Naturales
Discriminant function
Morphometrics
Sex classification
Sexual dimorphism
dc.description.none.fl_txt_mv Monomorphic birds cannot be sexed visually and discriminant functions on the basis of external morphological variations are frequently used. Our objective was to evaluate the reliability of sex classification functions created from structural measurements of Chilean flamingos <i>Phoenicopterus chilensis</i> museum skins for the gender assignment of live birds. Five meas-urements were used to develop four discriminant functions: culmen, bill height and width, tarsus length and middle toe claw. The functions were tested on a sample of live flamingos from a zoo. The best classification for museum flamingos was given by a function using tarsus length, bill width and middle toe claw (97%). However, this function did not give the best classification for the zoo-based flamingos (81%) which had the best sex assignment by a function including measurements of tarsus, culmen and bill height and width (85%). This shows that a function giving good results in the sample from which it originated may not be as good when applied to another group of animals. Our study emphasizes the need for assessing the accuracy of a function by testing it with other methods to ensure its suitability when being applied.
Facultad de Ciencias Naturales y Museo
description Monomorphic birds cannot be sexed visually and discriminant functions on the basis of external morphological variations are frequently used. Our objective was to evaluate the reliability of sex classification functions created from structural measurements of Chilean flamingos <i>Phoenicopterus chilensis</i> museum skins for the gender assignment of live birds. Five meas-urements were used to develop four discriminant functions: culmen, bill height and width, tarsus length and middle toe claw. The functions were tested on a sample of live flamingos from a zoo. The best classification for museum flamingos was given by a function using tarsus length, bill width and middle toe claw (97%). However, this function did not give the best classification for the zoo-based flamingos (81%) which had the best sex assignment by a function including measurements of tarsus, culmen and bill height and width (85%). This shows that a function giving good results in the sample from which it originated may not be as good when applied to another group of animals. Our study emphasizes the need for assessing the accuracy of a function by testing it with other methods to ensure its suitability when being applied.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/83936
url http://sedici.unlp.edu.ar/handle/10915/83936
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1674-5507
info:eu-repo/semantics/altIdentifier/doi/10.1093/czoolo/58.6.851
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
851-855
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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