oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 161 )

2018 ( 879 )

2017 ( 805 )

2016 ( 1177 )

Custom range...

Search Results: 1 - 10 of 512373 matches for " José A Cocilovo "
All listed articles are free for downloading (OA Articles)
Page 1 /512373
Display every page Item
MICRODIFERENCIACIóN CRANEANA EN LA COSTA DE ARICA Y VALLE DE AZAPA, NORTE DE CHILE: RESUMEN DE RESULTADOS Y CONCLUSIONES
Rothhammer,Francisco; Cocilovo,José A;
Chungará (Arica) , 2008, DOI: 10.4067/S0717-73562008000300007
Abstract: recently, sutter and mertz (2004) studying non metric cranial traits in prehistoric groups from northem chile were unable tofind significant variation from the coastal archaic to the late intermedíate in the azapa valley in contrast with our findings which indícate the exlstence of an important mlcroevolutlonary process. the objects of thls study is to provlde an explanatlon for the observed dlscrepancy between our results and those of sutter and mertz (2004), to comment on the new results of sutter (2006) in an effort to enrlch the dlscusslon concemlng the prehistoric populatlon dynamlcs of the azapa valley reglón and to summerlze findings in order to achieve a synthesls. in order to accomplish these goals it was found convenlent to perform a comparative analysls of cranial metrical and non metrical variation of the prehistoric groups on whlch publlshed inferences were based, as well as an evaluatlon ofthe statlstlcal methodology employed by the above mentían authors.
MICRODIFERENCIACIóN CRANEANA EN LA COSTA DE ARICA Y VALLE DE AZAPA, NORTE DE CHILE: RESUMEN DE RESULTADOS Y CONCLUSIONES CRANIAL MICRODIFFERENTIATION IN THE COAST OF ARICA AND AZAPA VALLEY OF NORTHERN CHILE: SUMMARY OF RESULTS AND CONCLUSIONS
Francisco Rothhammer,José A Cocilovo
Chungará (Arica) - Revista de Antropología Chilena , 2008,
Abstract: Recientemente, Sutter y Mertz (2004) a base de un análisis de rasgos craneanos no métricos postularon una ausencia de variación desde el Arcaico costero hasta el período Intermedio Tardío en el valle de Azapa, en contraposición a nuestros hallazgos que sustentaban un importante proceso microevolutivo. Los objetivos del presente estudio son indagar acerca de los factores que podrían dar cuenta de las discrepancias entre nuestros resultados y aquellos reportados por Sutter y Mertz (2004), comentar los nuevos resultados de Sutter (2006), en un esfuerzo por enriquecer la discusión en torno a la dinámica poblacional prehistórica de la región del valle de Azapa y resumir los resultados para lograr una síntesis. Para ello resultó conveniente realizar un análisis comparativo de la variabilidad exhibida por los grupos prehistóricos para rasgos métricos y no métricos (atributos) y revisar tanto la información craneana en que se basaron las inferencias publicadas en los trabajos citados, como también la metodología empleada en su evaluación estadística. Recently, Sutter and Mertz (2004) studying non metric cranial traits in prehistoric groups from northem Chile were unable tofind significant variation from the coastal Archaic to the Late Intermedíate in the Azapa Valley in contrast with our findings which indícate the exlstence of an Important mlcroevolutlonary process. The objects of thls study Is to provlde an explanatlon for the observed dlscrepancy between our results and those of Sutter and Mertz (2004), to comment on the new results of Sutter (2006) In an effort to enrlch the dlscusslon concemlng the prehistoric populatlon dynamlcs of the Azapa valley reglón and to summerlze findings In order to achieve a synthesls. In order to accomplish these goals It was found convenlent to perform a comparative analysls of cranial metrical and non metrical variation of the prehistoric groups on whlch publlshed Inferences were based, as well as an evaluatlon ofthe statlstlcal methodology employed by the above mentían authors.
Sexual Dimorphism in Prehispanic Populations of the Cochabamba Valleys, Bolivia  [PDF]
José A. Cocilovo, María L. Fuchs, Tyler G. O’Brien, Héctor H. Varela
Advances in Anthropology (AA) , 2013, DOI: 10.4236/aa.2013.31002
Abstract:
The expression of sexual dimorphism may vary across time and space, as well as within and between populations depending on genetic and environmental factors that influence growth and development. The objective of the present work is to contribute to the knowledge of factors that determine the physical characteristics of ancient human groups in the eastern valleys of Cochabambaa key region for cultural development, inter-regional interaction with northern Chile and northwest Argentina, and their noticeable role in the settlement of the south central Andean region. This paper analyzes the differences between males and females crania representing ancient human groups that inhabited the eastern valleys of Cochabamba, Bolivia. Thirty-one craniometric variables are analyzed from a sample of 234 individuals. Differences are evaluated using univariate analysis by ANOVA and multivariate discriminant analysis. The results indicate the existence of higher mean values in males compared to females in most cranial measurements (mean difference 5.3%). The discriminant analysis also reveals a significant morphological difference exists between sexes. Furthermore, by means of the discriminant function, the reclassification of correct sex was 99% of cases. This information indicates that members of this population could live in optimal conditions, with adequate resources to ensure growth and development and normal expression of the phenotype of each sex.
Divergencia fenotípica en los oasis de San Pedro de Atacama, norte de Chile
Varela,Héctor H; Cocilovo,José A;
Estudios atacame?os , 2011, DOI: 10.4067/S0718-10432011000200006
Abstract: in this work we analyze the phenotypic differences among cemeteries from the prehistoric population of san pedro de atacama. the sample comprises 622 individuals, corresponding to early, middle, and late periods. we worked with 37 craniometric variables. the differences among ayllus were evaluated using multivariate analysis. the results indicate a significant differentiation during the early period. the differentiation among ayllus during the middle period is reduced. during the late period, there is a moderate increase of differences among sites.
Divergencia fenotípica en los oasis de San Pedro de Atacama, norte de Chile
Héctor H Varela,José A Cocilovo
Estudios Atacame?os , 2011,
Abstract: Se analiza la diferenciación fenotípica entre ayllus de la población agroalfarera de San Pedro de Atacama. La muestra está constituida por 622 individuos correspondientes a los períodos Temprano, Medio y Tardío. Se trabajó con 37 variables craneométricas. Las diferencias se evaluaron mediante técnicas de análisis estadístico multivariado. Los resultados indican una importante diferenciación en el período Temprano. Durante el período Medio, se observa la reducción de las diferencias entre sitios y, en el período Tardío, un aumento moderado de las diferencias entre los ayllus. In this work we analyze the phenotypic differences among cemeteries from the prehistoric population of San Pedro de Atacama. The sample comprises 622 individuals, corresponding to Early, Middle, and Late periods. We worked with 37 craniometric variables. The differences among ayllus were evaluated using multivariate analysis. The results indicate a significant differentiation during the Early Period. The differentiation among ayllus during the Middle Period is reduced. During the Late Period, there is a moderate increase of differences among sites.
Valley to Valley: The Biological Connection between Prehispanic Residents of Cochabamba, Bolivia, and Azapa, Chile  [PDF]
Héctor H. Varela, José A. Cocilovo, Tyler G. O’Brien
Advances in Anthropology (AA) , 2013, DOI: 10.4236/aa.2013.34030
Abstract:

One of the most interesting problems facing the interpretation of south central Andean prehistory is to decipher the genetic relationships among ancient groups that inhabited this region. This study evaluates the biological relationships between the ancient inhabitants of the coast and interior valleys of the Azapa region in northern Chile and the Cochabamba valleys of Bolivia, with reference to highland Tiwanaku groups. Craniometric data (N = 299) were statistically evaluated to compute group means using Mahalanobis (D2) values. Results demonstrate that there is a notable difference between coastal and interior valley populations of the Azapa region; whereas a close biological association exists between groups from the Cochabamba valleys and the interior Azapa valleys, especially for those associated with the Formative and Tiwanaku Periods.

La deformación craneana en la población prehistórica de Coyo Oriente, San Pedro de Atacama
Costa,M. Antonietta; Llagostera,Agustín; Cocilovo,José A;
Estudios atacame?os , 2008, DOI: 10.4067/S0718-10432008000200003
Abstract: the aim of this paper is to characterize one of the atacama basin's representative populations of the middle period and the possible arrival of foreign groups associated to tiwanaku expansion. the cranial collection from the coyo oriente cemetery, housed at the museo arqueológico de san pedro de atacama, was hence analyzed for its sex, age and intentional deformation patterns. these analyses were applied to the entire collection as well as to the three mortuary zones of the cemetery identified by le paige, that would represent a chronological occupation sequence. further comparison between the two groups (one supposedly local, the other foreign) was achieved bymeans of the sites' textile component, as described by oakland in 1992.
ANáLISIS DE LA VARIANZA AMBIENTAL DE CARACTERES MéTRICOS DEL ESQUELETO HUMANO: EL CASO PUNTA TEATINOS, NORTE SEMIáRIDO, CHILE (4.500 A.P.)
Varela,Héctor H; Cocilovo,José A; Quevedo,Silvia;
Chungará (Arica) , 2009, DOI: 10.4067/S0717-73562009000200010
Abstract: in order to assess kinship between individuáis, it is necessary to know the genetic variance (vg) of quantitative traits. in many cases it is not possible to estímate this valué without the information obtained from a correlation among relatives or through selection experiments. in the absence of appropriate data it is possible to approach this by means ofthe repeatability of quantitative traits. phenotypic variance (vp) is equal to genetic variance (vg) plus environmental variance (ve) and this last can be broken down into a general environmental variance (ve ) and a special environmental variance (veg). the correlation between measurements of the left and right side of an individual allows us to estímate the repeatability (r) and the special environmental component (1 - r). using the information obtained from a prehistoric groupfrom punta teatinos, the máximum genetic variance is calculated (vgmax=vp-ves) for nine variables ofthe skull, seven ofthe postcranial skeleton, andtwo ofthe dentition. the results indícate that the r average is of0.74 in teeth, 0.83 in the skull and 0.98 in the postcranial skeleton, suggesting a differential distribution ofthe special environmental effectfrom the anatomical and functional point ofview.
La deformación craneana en la población prehistórica de Coyo Oriente, San Pedro de Atacama
M. Antonietta Costa,Agustín Llagostera,José A Cocilovo
Estudios Atacame?os , 2008,
Abstract: El propósito de este trabajo es caracterizar una población representativa del salar de Atacama durante el Período Medio y los posibles flujos poblacionales asociados al fenómeno Tiwanaku. Para ello, la colección de cráneos del cementerio arqueológico Coyo Oriente, depositada en el Museo Arqueológico de San Pedro de Atacama, fue sometida a análisis osteológicos determinándose sexo, edad y deformación craneana. Estos análisis se aplicaron a la totalidad de la colección, así como a las tres zonas del cementerio diferenciadas por Le Paige, las que representarían una secuencia cronológica de ocupación. Además se realizó el análisis comparativo entre dos grupos (supuestamente uno local y otro foráneo) determinados por el componente textil del sitio publicado por Oakland en 1992. The aim of this paper is to characterize one of the Atacama basin's representative populations of the Middle Period and the possible arrival of foreign groups associated to Tiwanaku expansion. The cranial collection from the Coyo Oriente cemetery, housed at the Museo Arqueológico de San Pedro de Atacama, was hence analyzed for its sex, age and intentional deformation patterns. These analyses were applied to the entire collection as well as to the three mortuary zones of the cemetery identified by Le Paige, that would represent a chronological occupation sequence. Further comparison between the two groups (one supposedly local, the other foreign) was achieved bymeans of the sites' textile component, as described by Oakland in 1992.
ANáLISIS DE LA VARIANZA AMBIENTAL DE CARACTERES MéTRICOS DEL ESQUELETO HUMANO: EL CASO PUNTA TEATINOS, NORTE SEMIáRIDO, CHILE (4.500 A.P.) ENVIRONMENTAL VARIANCE AS ESTIMATED IN METRIC TRAITS OF THE HUMAN SKELETON: THE CASE OF PUNTA TEATINOS, SEMIARID NORTHERN CHILE (4,500 BP)
Héctor H Varela,José A Cocilovo,Silvia Quevedo
Chungará (Arica) - Revista de Antropología Chilena , 2009,
Abstract: Para hacer inferencias acerca del parentesco entre los individuos es necesario conocer la varianza genética (V Q) de caracteres cuantitativos, lo cual es posible a partir de la correlación entre parientes. En ausencia de esta información, puede emplearse la repe-tibilidad (r), es decir, la correlación entre mediciones del lado derecho e izquierdo del individuo, la cual permite estimar además la componente ambiental especial (1-r). La varianza fenotípica (Vp) es igual a la varianza genética (V Q) más la varianza ambiental (V E) y esta última incluye la varianza ambiental general (V E ) y la varianza ambiental especial (V Es). Empleando el grupo prehistórico de Punta Teatinos, se hacen estimaciones de estos estadísticos para nueve mediciones del cráneo, siete del esqueleto postcraneal y dos de los dientes. Se determinó que la repetibilidad promedio es de 0,74 en dientes, 0,83 en cráneo y 0,98 en el esqueleto postcraneal, sugiriendo una distribución diferencial de V Es desde el punto de vista anatómico y funcional. Las repetibilidades en individuos adultos de ambos sexos en el cráneo y en el esqueleto postcraneal son semejantes. En esta última región anatómica, los valores r de los infantiles se diferencian de los adultos. Las piezas dentarias presentan la menor correlación bilateral y registran un mayor impacto ambiental especial, actuando durante la mayor parte de la experiencia vital de los individuos. In order to assess kinship between individuáis, it is necessary to know the genetic variance (V G) of quantitative traits. In many cases it is not possible to estímate this valué without the information obtained from a correlation among relatives or through selection experiments. In the absence of appropriate data it is possible to approach this by means ofthe repeatability of quantitative traits. Phenotypic variance (V P) is equal to genetic variance (V G) plus environmental variance (V E) and this last can be broken down into a general environmental variance (V E ) and a special environmental variance (V EG). The correlation between measurements of the left and right side of an individual allows us to estímate the repeatability (r) and the special environmental component (1 - r). Using the information obtained from a prehistoric groupfrom Punta Teatinos, the máximum genetic variance is calculated (V Gmax=Vp-V ES) for nine variables ofthe skull, seven ofthe postcranial skeleton, andtwo ofthe dentition. The results indícate that the r average is of0.74 in teeth, 0.83 in the skull and 0.98 in the postcranial skeleton, suggesting a differential distribution
Page 1 /512373
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.