Stable Nitrogen Isotope Analysis of Dentine Serial Sections Elucidate Sex Differences in Weaning Patterns of Wild Chimpanzees (Pan troglodytes)

Fahy, Geraldine, Richards, Michael P., Fuller, Benjamin T., Deschner, Tobias, Hublin, Jean-Jacques, Boesch, Christophe (2014) Stable Nitrogen Isotope Analysis of Dentine Serial Sections Elucidate Sex Differences in Weaning Patterns of Wild Chimpanzees (Pan troglodytes). American Journal of Physical Anthropology, 153 (4). pp. 635-642. ISSN 0002-9483. (doi:10.1002/ajpa.22464) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

PDF (Restricted due to publisher copyright policy - Stable Nitrogen Isotope Analysis of Dentine Serial Sections Elucidate Sex Differences in Weaning Patterns of Wild Chimpanzees (Pan troglodytes)) - Publisher pdf
Restricted to Repository staff only
Contact us about this Publication Download (347kB)
[img]
Official URL
http://dx.doi.org/10.1002/ajpa.22464

Abstract

Offspring provisioning is one of the most energetically demanding aspects of reproduction for female mammals. Variation in lactation length and weaning strategies between chimpanzees (Pan troglodytes), our closest living relative, and modern human societies have been reported. When and why these changes occurred is frequently debated. Our study used stable nitrogen isotope data of tooth root dentine from wild Western chimpanzees (Pan troglodytes verus) in Tai National Park, C^ote d’Ivoire, to quantify weaning in these chimpanzees and explore if infant sex plays a role in maternal investment. We analyzed serial sections of deciduous lateral incisor root dentine from four Tai chimpanzees to establish the d15N signal of nursing infants; we then analyzed serial sections of first permanent mandibular molar root dentine from 12 Tai chimpanzees to provide quantitative d15N data on weaning in this population. Up to 2 years of age both sexes exhibited dentine d15N values 2–3% higher than adult female Tai chimpanzees, consistent with a nursing signal. Thereafter a steady decrease in d15N values consistent with the onset, and progression, of weaning, was visible. Sex differences were also evident, where male d15N values decreased at a significantly slower rate compared to females. Confirmation of sex differences in maternal investment among Tai chimpanzees, demonstrates the viability of using isotope analysis to investigate weaning in non-human primates. Additionally, assuming that behaviors observed in the Ta€? chimpanzees are illustrative of the ancestral pattern, our results provide a platform to enable the trajectory of weaning in human evolution to be further explored.

Item Type: Article
DOI/Identification number: 10.1002/ajpa.22464
Uncontrolled keywords: maternal investment, lactation, primatology, human evolution
Subjects: G Geography. Anthropology. Recreation
G Geography. Anthropology. Recreation > GF Human ecology. Anthropogeography
G Geography. Anthropology. Recreation > GN Anthropology
Divisions: Faculties > Social Sciences > School of Anthropology and Conservation
Faculties > Social Sciences > School of Anthropology and Conservation > Biological Anthropology
Faculties > Social Sciences > School of Anthropology and Conservation > DICE (Durrell Institute of Conservation and Ecology)
Depositing User: Geraldine Fahy
Date Deposited: 01 May 2015 08:33 UTC
Last Modified: 29 May 2019 14:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/48165 (The current URI for this page, for reference purposes)
Fahy, Geraldine: https://orcid.org/0000-0002-1281-1260
  • Depositors only (login required):

Downloads

Downloads per month over past year