Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed

Twenty-eight skeletonized hemicoxae from young animals (yearlings, 13 males and 15 females) belonging to the "Cavall Pirinenc Català" horse (Catalan Pyrenean Horse) breed were studied by means of geometric morphometric (GM) methods. Morphometric analysis was based on coordinates of 16 land...

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Autores principales:	Parés-Casanova,Pere M, Martínez,Sara
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2013
Materias:	Animal ethnology Cavall Pirinenc Català Catalan Pyrenean Horse Hipbones
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200045
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spelling	oai:scielo:S0717-950220130002000452014-09-09Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine BreedParés-Casanova,Pere MMartínez,Sara Animal ethnology Cavall Pirinenc Català Catalan Pyrenean Horse Hipbones Twenty-eight skeletonized hemicoxae from young animals (yearlings, 13 males and 15 females) belonging to the "Cavall Pirinenc Català" horse (Catalan Pyrenean Horse) breed were studied by means of geometric morphometric (GM) methods. Morphometric analysis was based on coordinates of 16 landmarks of the ilium and ischiopubic regions that were digitized on 2D photographic images. Sexes did not appear separated either by size or shape, the latter being independent of the former. K-means clustering of shape variables were used in order to classify individuals by sex and an average accuracy of 57.1% was achieved. Males were misclassified more frequently than females. For the iliac landmarks, which contributed to the total variance of shape with the higher degree, the value obtained increased to 60.7% for k-means. The ischiopubic complex contributed less to sex differentiation according to shape. It is concluded that the use of GM and multivariate statistics is not a reliable method to quantify pelvic shape and size differences between the sexes for equine yearlings. This is the first known study to apply GM to the hip of an equine breed.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.31 n.2 20132013-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200045en10.4067/S0717-95022013000200045
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Animal ethnology Cavall Pirinenc Català Catalan Pyrenean Horse Hipbones
spellingShingle	Animal ethnology Cavall Pirinenc Català Catalan Pyrenean Horse Hipbones Parés-Casanova,Pere M Martínez,Sara Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
description	Twenty-eight skeletonized hemicoxae from young animals (yearlings, 13 males and 15 females) belonging to the "Cavall Pirinenc Català" horse (Catalan Pyrenean Horse) breed were studied by means of geometric morphometric (GM) methods. Morphometric analysis was based on coordinates of 16 landmarks of the ilium and ischiopubic regions that were digitized on 2D photographic images. Sexes did not appear separated either by size or shape, the latter being independent of the former. K-means clustering of shape variables were used in order to classify individuals by sex and an average accuracy of 57.1% was achieved. Males were misclassified more frequently than females. For the iliac landmarks, which contributed to the total variance of shape with the higher degree, the value obtained increased to 60.7% for k-means. The ischiopubic complex contributed less to sex differentiation according to shape. It is concluded that the use of GM and multivariate statistics is not a reliable method to quantify pelvic shape and size differences between the sexes for equine yearlings. This is the first known study to apply GM to the hip of an equine breed.
author	Parés-Casanova,Pere M Martínez,Sara
author_facet	Parés-Casanova,Pere M Martínez,Sara
author_sort	Parés-Casanova,Pere M
title	Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
title_short	Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
title_full	Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
title_fullStr	Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
title_full_unstemmed	Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed
title_sort	geometric morphometrics for the study of hemicoxae sexual dimorphism in a local domestic equine breed
publisher	Sociedad Chilena de Anatomía
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200045
work_keys_str_mv	AT parescasanovaperem geometricmorphometricsforthestudyofhemicoxaesexualdimorphisminalocaldomesticequinebreed AT martinezsara geometricmorphometricsforthestudyofhemicoxaesexualdimorphisminalocaldomesticequinebreed
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Geometric Morphometrics for the Study of Hemicoxae Sexual Dimorphism in a Local Domestic Equine Breed

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