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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Facultad de Filosofía y Humanidades. Museo de Antropología
2009
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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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