Articlebronze2017

Assessing human weaning practices with calcium isotopes in tooth enamel

Théo Tacail · Béatrice Thivichon‐Prince · Jeremy E. Martin · Cyril Charles · Laurent Viriot · Vincent Balter

73 citations0/0 files storedProceedings of the National Academy of Sciences

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Pleistocene-Era Hominins and Archaeology Archaeology and ancient environmental studies Forensic Anthropology and Bioarchaeology Studies

Abstract

Significance The practice of weaning, the dietary transition from exclusive breastfeeding to exclusive nonmilk food, is a key aspect of development and evolution of hominins, but its study in the fossil record is hampered by a lack of unambiguous biomarkers. Ca stable isotope ratios of skeletal remains are expected to bear information about milk consumption. Here we demonstrate that modern human tooth enamel records a temporal variation of Ca isotope compositions, which is related to breastfeeding duration. Ca isotopes could be used as a biomarker for reconstruction of weaning practices in past human and fossil hominin species.

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References

2010Brief communication: The London atlas of human tooth development and eruption 2008Hominin life history: reconstruction and evolution 2003Life history theory and the immune system: Steps toward a human ecological immunology 1996Evolution of the human life cycle 2005From the ape's dilemma to the weanling's dilemma: early weaning and its evolutionary context 2013Barium distributions in teeth reveal early-life dietary transitions in primates 2009Weaning behaviour in human evolution 1990Birth spacing patterns in humans and apes

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2020Calcium isotopic ecology of Turkana Basin hominins 2019Calcium isotopic patterns in enamel reflect different nursing behaviors among South African early hominins 2019The Dentition 2020Spatially-Resolved Ca Isotopic and Trace Element Variations in Human Deciduous Teeth Record Diet and Physiological Change 2021Teeth reveal juvenile diet, health and neurotoxicant exposure retrospectively: What biological rhythms and chemical records tell us

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