2013
DOI: 10.1038/nature12169
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Barium distributions in teeth reveal early-life dietary transitions in primates

Abstract: Early life dietary transitions reflect fundamental aspects of primate evolution and are important determinants of health in contemporary human populations1,2. Weaning is critical to developmental and reproductive rates; early weaning can have detrimental health effects but enables shorter inter-birth intervals, which influences population growth3. Uncovering early life dietary history in fossils is hampered by the absence of prospectively-validated biomarkers that are not modified during fossilisation4. Here w… Show more

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Cited by 200 publications
(287 citation statements)
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“…14), the most widely accepted biomarker for weaning practices is the nitrogen isotope ratio measured in hair, fingernails, bone, or dentine collagen (22)(23)(24)(25). The Sr/Ca and Ba/Ca elemental ratios in tooth enamel and dentine have also proved relevant for reconstructing early-life dietary transitions (1,26,27). Nevertheless, these various methods are possibly associated with one or several drawbacks.…”
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confidence: 99%
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“…14), the most widely accepted biomarker for weaning practices is the nitrogen isotope ratio measured in hair, fingernails, bone, or dentine collagen (22)(23)(24)(25). The Sr/Ca and Ba/Ca elemental ratios in tooth enamel and dentine have also proved relevant for reconstructing early-life dietary transitions (1,26,27). Nevertheless, these various methods are possibly associated with one or several drawbacks.…”
mentioning
confidence: 99%
“…The use of Ca isotope analysis in tooth enamel allows microsampling and offers an independent approach to tackle challenging questions related to past population dynamics and evolution of weaning practices in hominins. T he reconstruction of weaning practices, the dietary transition from exclusive breastfeeding to exclusive nonmilk food (1), is fundamental in the study of past populations and in human evolution. Weaning constitutes a major determinant in health and survival of mammals (2)(3)(4)(5)(6)(7).…”
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confidence: 99%
“…Reconstructions of BWP in domesticated animals are important when considering the relationship between humans and animals (Balasse and Tresset, 2002;Gillis et al, 2013). Furthermore, studies of living mammals are essential to demonstrate that isotopic changes are associated with breastfeeding and weaning (Fogel et al, 1989;Millard, 2000;Balasse et al, 2001;Fuller et al, 2006a;Humphrey et al, 2007Humphrey et al, , 2008aAustin et al, 2013).…”
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confidence: 99%
“…To elucidate the evolutionary process of early weaning, it is important to reconstruct breastfeeding periods in past hominins (Kennedy, 2005;Gibbons, 2008;Humphrey, 2010). Recently, geochemical methods were used to reconstruct BWPs of the hominin species that preceded Homo sapiens (Austin et al, 2013).…”
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confidence: 99%
“…Some of these techniques may involve mechanical grinding and drilling of small areas within a sample (Hufthammer et al 2010), or acid dissolution of successive layers of tissue. While chemical analyses such as electron probe x-ray microanalysis (EPXMA), secondary ion mass spectrometry (SIMS), proton-induced x-ray emission spectroscopy (PIXE), or synchrotron x-ray fluorescence (sXRF), have all been applied to the analysis of the chemical composition of dental tissues, laser ablation-inductively coupled plasma -mass spectrometry (LA-ICP-MS) is the most commonly utilized technique for conducting microspatial analyses of dental hard tissues (Lochner et al 1999;Goodman et al 2003;Kang et al 2004;Grün et al 2008;Humphrey et al 2008;Dolphin and Goodman 2009;Hare et al 2011;Vašinová Galiová et al 2012;Austin et al 2013;Farell et al 2013 analyses, pollutant exposure data gathered using trace element analyses (LA-ICP-MS), assessment of tissue preservation using Fourier transform infrared spectroscopy (FTIR), and isotopic analyses of δ 18 O and δ 13 C contributed data regarding origins/migration and palaeodiet, respectively.…”
Section: Introductionmentioning
confidence: 99%