Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements

In wild-living populations adult camelids are mainly sexed by observing their social and reproductive behavior, and on occasion, their genitalia. Both biologists and archaeologists usually assume the absence of clearly identifiable sexually dimorphic somatic and postcranial traits among adult guanac...

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Autores principales: Kaufmann, Cristian Ariel, L´Heureux, Gabriela Lorena
Formato: Artículo revista
Lenguaje:Español
Publicado: Facultad de Filosofía y Humanidades. Museo de Antropología 2009
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Acceso en línea:https://revistas.unc.edu.ar/index.php/antropologia/article/view/5417
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spelling I10-R10-article-54172021-06-18T17:46:55Z Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements El dimorfismo sexual en guanacos (Lama guanicoe). Una evaluación osteométrica de elementos poscraneales Kaufmann, Cristian Ariel L´Heureux, Gabriela Lorena guanaco dimorfismo sexual morfometría pelvis huesos largos guanaco sexual dimorphism morphometry pelvis long bones In wild-living populations adult camelids are mainly sexed by observing their social and reproductive behavior, and on occasion, their genitalia. Both biologists and archaeologists usually assume the absence of clearly identifiable sexually dimorphic somatic and postcranial traits among adult guanaco (Lama guanicoe) specimens. The principal studies that evaluate the osteological differences between sexes in this species, had been carried out using qualitative morphological traits of the pelvis and morphometric traits of the skull. Therefore, the main objective of this paper is to contribute to the development of methodological tools aimed to accurately discriminate between sexes using morphometric techniques. In addition, we assess in this paper the existence and magnitude of the postcranial sex-related morphometric differences in a sample of modern guanaco specimens from Cinco Chañares, Río Negro, Argentina. The sample was composed by 32 individuals (8 males and 24 females) older than 30 month at the age of death. Fifty one hemipelvis, 40 humeri, 39 radioulnae, 40 femora, and 41 tibiae were measured. The obtained results show that the main morphometric differences between sexes are related to size and shape variation in the whole pelvis and acetabulum. In the appendicular skeleton no statistically significant differences between sexes were found, but this ought to be reevaluated increasing sample sizes of male specimens. En poblaciones vivas, los camélidos silvestres sudamericanos son sexados a partir de la observación de su conducta social y reproductiva. Por lo general, tanto biólogos como arqueólogos asumen la ausencia de caracteres morfológicos que evidencien un dimorfismo sexual marcado entre individuos adultos de guanaco (Lama guanicoe). Los principales estudios que evalúan las diferencias osteológicas entre machos y hembras en esta especie están basados en análisis de variables morfométricas craneanas y en caracteres morfológicos de la pelvis. En este trabajo se evalúa la existencia y magnitud de variables osteométricas poscraneales de diferenciación sexual en una población moderna de guanacos procedente de la localidad Cinco Chañares, Provincia de Río Negro, Argentina. Se estudiaron 32 individuos (8 machos y 24 hembras) de más de 30 meses en los que se midieron 51 hemipelvis, 40 húmeros, 39 radioulnas, 40 fémures y 41 tibias. Los resultados mostraron que las principales diferencias osteológicas, vinculadas con el dimorfismo sexual, se relacionan con variaciones en el tamaño y la forma de la pelvis. En los huesos largos, las diferencias osteométricas significativas se registraron sólo en variables aisladas y no se pudieron definir diferencias osteométricas asociadas con el dimorfismo sexual. Igualmente se considera que esto deberá ser reevaluado con mayor profundidad considerando una muestra mayor de individuos machos. Facultad de Filosofía y Humanidades. Museo de Antropología 2009-12-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion investigación básica application/pdf application/pdf https://revistas.unc.edu.ar/index.php/antropologia/article/view/5417 Revista del Museo de Antropología; Vol 2 (2009) NÚMERO 1; 181-198 Revista del Museo de Antropología; Vol 2 (2009) NÚMERO 1; 181-198 Revista del Museo de Antropología; Vol 2 (2009) NÚMERO 1; 181-198 1852-4826 1852-060X 10.31048/1852.4826.v2.n1 spa https://revistas.unc.edu.ar/index.php/antropologia/article/view/5417/5861 https://revistas.unc.edu.ar/index.php/antropologia/article/view/5417/5862 Derechos de autor 2009 Cristian Ariel Kaufmann, Gabriela Lorena L´Heureux
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Español
format Artículo revista
topic guanaco
dimorfismo sexual
morfometría
pelvis
huesos largos
guanaco
sexual dimorphism
morphometry
pelvis
long bones
spellingShingle guanaco
dimorfismo sexual
morfometría
pelvis
huesos largos
guanaco
sexual dimorphism
morphometry
pelvis
long bones
Kaufmann, Cristian Ariel
L´Heureux, Gabriela Lorena
Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
topic_facet guanaco
dimorfismo sexual
morfometría
pelvis
huesos largos
guanaco
sexual dimorphism
morphometry
pelvis
long bones
author Kaufmann, Cristian Ariel
L´Heureux, Gabriela Lorena
author_facet Kaufmann, Cristian Ariel
L´Heureux, Gabriela Lorena
author_sort Kaufmann, Cristian Ariel
title Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
title_short Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
title_full Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
title_fullStr Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
title_full_unstemmed Sexual dimorphism in guanacos (Lama guanicoe). An osteometric evaluation of postcranial elements
title_sort sexual dimorphism in guanacos (lama guanicoe). an osteometric evaluation of postcranial elements
description In wild-living populations adult camelids are mainly sexed by observing their social and reproductive behavior, and on occasion, their genitalia. Both biologists and archaeologists usually assume the absence of clearly identifiable sexually dimorphic somatic and postcranial traits among adult guanaco (Lama guanicoe) specimens. The principal studies that evaluate the osteological differences between sexes in this species, had been carried out using qualitative morphological traits of the pelvis and morphometric traits of the skull. Therefore, the main objective of this paper is to contribute to the development of methodological tools aimed to accurately discriminate between sexes using morphometric techniques. In addition, we assess in this paper the existence and magnitude of the postcranial sex-related morphometric differences in a sample of modern guanaco specimens from Cinco Chañares, Río Negro, Argentina. The sample was composed by 32 individuals (8 males and 24 females) older than 30 month at the age of death. Fifty one hemipelvis, 40 humeri, 39 radioulnae, 40 femora, and 41 tibiae were measured. The obtained results show that the main morphometric differences between sexes are related to size and shape variation in the whole pelvis and acetabulum. In the appendicular skeleton no statistically significant differences between sexes were found, but this ought to be reevaluated increasing sample sizes of male specimens.
publisher Facultad de Filosofía y Humanidades. Museo de Antropología
publishDate 2009
url https://revistas.unc.edu.ar/index.php/antropologia/article/view/5417
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first_indexed 2022-08-20T01:10:56Z
last_indexed 2022-08-20T01:10:56Z
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