Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis

Many contributions try to emphasize the similarities and differences between the Brown Skua Catharacta antarctica lonnbergi¸ and the South Polar Skua Catharacta maccormicki. Most of the morphological information of these species is based on field observation and referred to their external appearance...

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Detalles Bibliográficos
Autores principales: Kass, Nicolás Ariel, Montalti, Diego, Hospitaleche, Carolina Acosta
Formato: Articulo Comunicacion
Lenguaje:Inglés
Publicado: 2018
Materias:
Biología
Ciencias Naturales
Catharacta antarctica
Catharacta maccormicki
Antarctica
Geometric morphometry
Discriminant analysis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131973
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131973
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Biología
Ciencias Naturales
Catharacta antarctica
Catharacta maccormicki
Antarctica
Geometric morphometry
Discriminant analysis
spellingShingle Biología
Ciencias Naturales
Catharacta antarctica
Catharacta maccormicki
Antarctica
Geometric morphometry
Discriminant analysis
Kass, Nicolás Ariel
Montalti, Diego
Hospitaleche, Carolina Acosta
Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
topic_facet Biología
Ciencias Naturales
Catharacta antarctica
Catharacta maccormicki
Antarctica
Geometric morphometry
Discriminant analysis
description Many contributions try to emphasize the similarities and differences between the Brown Skua Catharacta antarctica lonnbergi¸ and the South Polar Skua Catharacta maccormicki. Most of the morphological information of these species is based on field observation and referred to their external appearance. Few studies deal with their morphometry, mostly using characters measured in live birds, but the information about skeletal features is scarce. In the present study, skull differences between the Brown Skua and the South Polar Skua are quantified through independent quantitative analyses. Shape differences were evaluated in a geometric morphometrics test, while linear metric parameters were used to analyze the differences between species in a principal component analysis, and finally, in a discriminant test. Geometric morphometrics analysis cannot separate groups, whereas linear morphometrics divide well two different groups, showing significant differences. Notwithstanding, the most significant result was obtained using the discriminant analysis, which differentiates the species using simple equations which contain combined measures that can be easily obtained.
format Articulo
Comunicacion
author Kass, Nicolás Ariel
Montalti, Diego
Hospitaleche, Carolina Acosta
author_facet Kass, Nicolás Ariel
Montalti, Diego
Hospitaleche, Carolina Acosta
author_sort Kass, Nicolás Ariel
title Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
title_short Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
title_full Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
title_fullStr Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
title_full_unstemmed Comparison of the skull of Brown Skua (Catharacta antarctica lonnbergi) and South Polar Skua (Catharacta maccormicki): differentiation source identification and discriminant analysis
title_sort comparison of the skull of brown skua (catharacta antarctica lonnbergi) and south polar skua (catharacta maccormicki): differentiation source identification and discriminant analysis
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/131973
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