análisis multivariado del dimorfismo sexual en doce etnias del gran chaco

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ID: 168147
2010
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Abstract
RESUMEN Se ensaya el cálculo de las distancias morfológicas para cuantificar el dimorfismo antropométrico sexual en distintas etnias aborígenes. Paralelamente se investiga: a- el grado de las diferencias entre los dimorfismos de los segmentos cefálico y postcefálico; b- los resultados con distintas combinaciones de variables, redundantes y no redundantes; c- la magnitud de participación de "forma" y "tamaño" en la distancia "total". Las distancias se calcularon mediante los algoritmos de Penrose (1954). El material utilizado fueron los datos antropométricos (inéditos) correspondientes a 890 varones y 844 mujeres, obtenidos por Jehan A.Vellard, en 12 etnias del Gran Chaco Sudamericano. Las conclusiones indican: 1) la sensibilidad discriminatoria del procedimiento; 2) el segmento corporal postcefálico proporciona valores de dimorfismo notoriamente más altos que el cefálico en 11 de las 12 etnias investigadas, siendo los Ayoreo la única en que ambas distancias resultan iguales; 3) el dimorfismo sexual antropométrico está dado por el componente "tamaño" más que por el componente "forma", en proporciones cuyo rango aproximado es de 3:1 a 1:0; 4) se indica la combinación más apta para calcular el dimorfismo somatométrico "global" (cefálico+postcefálico) que consta de 14 dimensiones, sin redundancia; 5) se plantea la hipótesis de que la razón dimorfismo cefálico/dimorfismo corporal postcefálico se vincularía, en relación inversa, al grado de mestización del grupo.   ABSTRACT This study addresses the issue of multivariate morphological distances applied to an anthropometric sexual dimorphism quantification in several aboriginal groups. Parallelly, three aspects are considered a- the degree of differences between cephalic and postcephalic dimorphisms; b- the results provided by different variables arrangements, redundants and no redundants; c- the "shape" and "size" participation in the "total" distance. The Penrose’s algoritm (1954) was used. A total of 1734 individuals (890 males and 844 females) measured by Jehan A. Vellard in twelve Gran Chaco South- American ethnical groups (unpublished data) were used in this study. It was concluded that: 1) the procedure had discriminatorial sensibility; 2) the postcephalic corporal segment gives higher values of dimorphism than the cephalic one; 3) the anthropometric sexual dimorphism was conditioned by the "size component" more than by the "shape component", with proportions ranging between 3:1 to 1:0; 4) the best combination to estimate the overall somatometric (cephalic+postcephalic) dimorphism include 14 variables without redundance; 5) hypothetically, the cephalic dimorphism/postcephalic dimorphism ratio seems to be in inverse relation with the group cross-breeding.
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marcellino2010revistaanlisis Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Alberto J. Marcellino;Sonia E. Colantonio
Journal the routledge handbook of language in conflict
Year 2010
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