Intra-population dental morphological variability among the Prehispanic Maya

The present paper proposes a new approach to the estimation of intra-site variability of dental morphological traits when they are dichotomized into presence vs absence. It rests on the assumption that (1) higher intra-site variability is the expression of intense population dynamics and gene flow;...

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Detalles Bibliográficos
Autor: ANDREA CUCINA TIDEI
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:México
Institución:Universidad Autónoma de Yucatán
Repositorio:Repositorio Digital Institucional de la Universidad Autónoma de Yucatán
Idioma:inglés
OAI Identifier:oai:redi.uady.mx:123456789/822
Acceso en línea:http://redi.uady.mx:8080/handle/123456789/822
Access Level:acceso embargado
Palabra clave:info:eu-repo/classification/cti/5
info:eu-repo/classification/cti/4
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spelling Intra-population dental morphological variability among the Prehispanic MayaANDREA CUCINA TIDEIinfo:eu-repo/classification/cti/5info:eu-repo/classification/cti/4The present paper proposes a new approach to the estimation of intra-site variability of dental morphological traits when they are dichotomized into presence vs absence. It rests on the assumption that (1) higher intra-site variability is the expression of intense population dynamics and gene flow; and (2) maximum variability is reached when each trait is expressed in the population with a frequency of 50%. The approach simulates the calculation of frequency of heterozygotes in Mendelian traits (2iyi), where xi and yi are the frequency of presence and absence of the trait. For every population, the final value corresponds to the average of (2xiyi) calculated from all the scored traits. Two separate analyses were performed using 50 and 40 traits recorded in 11 Prehispanic Maya skeletal collections from the Yucatán Peninsula. Resulting average values were related to the sites’ positions within the region's social, political and economic sphere of influence. Dental collections that were obtained from important city centers or by grouping many sites from a single region present the highest values of internal variability, followed by sites known to have played an important role in trade activities or in other socio-political contexts. At the other end, dental collections that represent smaller communities or more isolated, kin-related groups are set at the lower ranks of internal variability. One-way ANOVA tests for both 50 and 40 variables show that sample means present significant differences between the extreme ends of the ranked set of samples.2016-10-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://redi.uady.mx:8080/handle/123456789/822urn:issn:0018-442xreponame:Repositorio Digital Institucional de la Universidad Autónoma de Yucatáninstname:Universidad Autónoma de Yucatáninstacron:UADYengGeneración de conocimientoinfo:eu-repo/semantics/embargoedAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:redi.uady.mx:123456789/8222024-10-04T19:03:28Z
dc.title.none.fl_str_mv Intra-population dental morphological variability among the Prehispanic Maya
title Intra-population dental morphological variability among the Prehispanic Maya
spellingShingle Intra-population dental morphological variability among the Prehispanic Maya
ANDREA CUCINA TIDEI
info:eu-repo/classification/cti/5
info:eu-repo/classification/cti/4
title_short Intra-population dental morphological variability among the Prehispanic Maya
title_full Intra-population dental morphological variability among the Prehispanic Maya
title_fullStr Intra-population dental morphological variability among the Prehispanic Maya
title_full_unstemmed Intra-population dental morphological variability among the Prehispanic Maya
title_sort Intra-population dental morphological variability among the Prehispanic Maya
dc.creator.none.fl_str_mv ANDREA CUCINA TIDEI
author ANDREA CUCINA TIDEI
author_facet ANDREA CUCINA TIDEI
author_role author
dc.subject.none.fl_str_mv info:eu-repo/classification/cti/5
info:eu-repo/classification/cti/4
topic info:eu-repo/classification/cti/5
info:eu-repo/classification/cti/4
description The present paper proposes a new approach to the estimation of intra-site variability of dental morphological traits when they are dichotomized into presence vs absence. It rests on the assumption that (1) higher intra-site variability is the expression of intense population dynamics and gene flow; and (2) maximum variability is reached when each trait is expressed in the population with a frequency of 50%. The approach simulates the calculation of frequency of heterozygotes in Mendelian traits (2iyi), where xi and yi are the frequency of presence and absence of the trait. For every population, the final value corresponds to the average of (2xiyi) calculated from all the scored traits. Two separate analyses were performed using 50 and 40 traits recorded in 11 Prehispanic Maya skeletal collections from the Yucatán Peninsula. Resulting average values were related to the sites’ positions within the region's social, political and economic sphere of influence. Dental collections that were obtained from important city centers or by grouping many sites from a single region present the highest values of internal variability, followed by sites known to have played an important role in trade activities or in other socio-political contexts. At the other end, dental collections that represent smaller communities or more isolated, kin-related groups are set at the lower ranks of internal variability. One-way ANOVA tests for both 50 and 40 variables show that sample means present significant differences between the extreme ends of the ranked set of samples.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-31
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://redi.uady.mx:8080/handle/123456789/822
url http://redi.uady.mx:8080/handle/123456789/822
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
http://creativecommons.org/licenses/by-nc-nd/4.0
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dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv Generación de conocimiento
dc.source.none.fl_str_mv urn:issn:0018-442x
reponame:Repositorio Digital Institucional de la Universidad Autónoma de Yucatán
instname:Universidad Autónoma de Yucatán
instacron:UADY
instname_str Universidad Autónoma de Yucatán
instacron_str UADY
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reponame_str Repositorio Digital Institucional de la Universidad Autónoma de Yucatán
collection Repositorio Digital Institucional de la Universidad Autónoma de Yucatán
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