Morphological Adaptation to Climate in Modern Homo sapiens Crania: The Importance of Basicranial BreadthReport as inadecuate




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Collegium antropologicum, Vol.35 No.3 September 2011. -

The aim of this study is to investigate whether the variation in breadth of the cranial base among modern human populations

that inhabit different regions of the world is linked with climatic adaptation. This work provides an examination

of two hypotheses. The first hypothesis is that the correlation between basicranial breadth and ambient temperature

is stronger than the correlation between temperature and other neurocranial variables, such as maximum cranial

breadth, maximum neurocranial length, and the endocranial volume. The second hypothesis is that the correlation between

the breadth of the cranial base and the ambient temperature is significant even when other neurocranial features

used in this study including the size of the neurocranium are constant. For the sake of this research, the necessary

neurocranial variables for fourteen human populations living in diverse environments were obtained from Howells’ data

except for endocranial volume which was obtained by means of estimation. The ambient temperature more precisely,

the mean yearly temperature of the environments inhabited by these populations was used as a major climatic factor.

Data were analysed using Pearson correlation coefficients, linear regression and partial correlation analyses. The results

supported the two hypotheses, thus suggesting that ambient temperature may contribute to the observed differences

in the breadth of the cranial base in the studied modern humans.

variation in basicranial breadth; adaptation to climate; modern humans



Author: Wioletta Nowaczewska - Paweł Dąbrowski - Łukasz Kuźmiński -

Source: http://hrcak.srce.hr/



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