Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12136/367
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Title: Neandertal growth: what are the costs?
Authors: Mateos Cachorro, Ana
Goikoetxea, Idoia
Leonard, William R.
Martín-González, Jesús Ángel
Rodríguez-Gómez, Guillermo
Rodríguez, Jesús
Keywords: Homo neanderthalensis;Basal metabolic rate;Total energy expenditure;Energy of growth;Daily energy requirements
Issue Date: Dec-2014
Publisher: Elsevier
Citation: Journal of Human Evolution, 2014, 77, 167-178
Abstract: Energetic approaches have been increasingly used to address key issues in Neandertal palaeoecology and palaeobiology. Previous research has focused exclusively on the energy requirements of adults and highlights the high energy demands of these individuals compared with modern humans. Less attention has been paid to the energy requirements of sub-adult Neandertals, even though this age group could provide clues for a better understanding of Neandertal life history. Accordingly, herein, we estimate the energy costs of maintenance and growth in Neandertal infants and children from one to six years of age and compare these costs with values for modern humans. Statural growth models for two modern human populations (Beasain and Evenki) and an average Neandertal model population are used to establish weight growth models. In turn, these models of body weight growth are used to estimate key components of energetic variables (basal metabolic rate, total energy expenditure, energy of growth and daily energy requirements). Between three and six years of age, Neandertal children have slightly lower basal and growth energy costs than do modern humans of the same age, due primarily to their smaller body mass and slower growth rates. The reduction in energy allocated to growth is likely the result of metabolic adaptations to other somatic factors and thermal stress. Data from contemporary human infants and children suggest that even mild cold stress increases non-shivering thermogenesis, thus elevating metabolic needs by 50% or more. These results suggest that thermal stress likely played a strong role in shaping the delayed developmental patterns and lower energy allocated to growth during early life in Neandertals relative to Homo sapiens.
URI: http://hdl.handle.net/20.500.12136/367
ISSN: 0047-2484
1095-8606
DOI: 10.1016/j.jhevol.2014.09.003
metadata.dc.relation.publisherversion: https://doi.org/10.1016/j.jhevol.2014.09.003
Type: Article
Appears in Collections:Paleobiología

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