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Brief Communication: Elemental Models of Primate Nursing and Weaning Revisited.
Smith, Tanya M; Arora, Manish; Bharatiya, Maya; Dirks, Wendy; Austin, Christine.
Afiliación
  • Smith TM; Griffith Centre for Social and Cultural Research, Griffith University, AUSTRALIA.
  • Arora M; Australian Research Centre for Human Evolution, Griffith University, AUSTRALIA.
  • Bharatiya M; Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, USA.
  • Dirks W; Griffith Centre for Social and Cultural Research, Griffith University, AUSTRALIA.
  • Austin C; Australian Research Centre for Human Evolution, Griffith University, AUSTRALIA.
Am J Biol Anthropol ; 180(1): 216-223, 2023 01.
Article en En | MEDLINE | ID: mdl-37406034
Objectives: Intra-tooth patterns of trace elements barium (Ba) and strontium (Sr) have been used to infer human and nonhuman primate nursing histories, including australopithecine and Neanderthal juveniles. Here we contrast the two elemental models in first molars (M1s) of four wild baboons and explore the assumptions that underlie each. Materials and Methods: Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) was employed to create comprehensive calcium-normalized barium and strontium (Ba/Ca, Sr/Ca) maps of M1 enamel and dentine at 35 micron resolution. Results: Postnatal Ba/Ca values were typically high, peaking ~0.5 years of age and then decreasing throughout M1 crown formation; all four individuals showed minimal Ba/Ca values between ~1.2-1.8 years, consistent with field reports of the cessation of suckling. Enamel Sr/Ca did not support patterns of previous LA-ICP-MS spot sampling as the enamel rarely showed discrete Sr/Ca secretory zonation. Increases in Sr/Ca appeared in coronal dentine beginning ~0.3 years, with varied peak value ages (~0.7-2.7 years) and no evidence of a predicted postweaning decline. Discussion: Inferences of baboon weaning ages from initial Ba/Ca minima are more congruent with behavioral observations than Sr/Ca maxima; this is consistent with studies of captive macaques of known weaning ages. Elemental variation is more apparent in the coronal dentine than the enamel of these baboons, which may relate to its more rapid mineralization and protection from the oral environment. Inferences of nursing histories from enamel Sr/Ca patterns alone should be reconsidered, and elevated values of Ba/Ca and Sr/Ca in teeth formed after weaning require further study.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diente Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Am J Biol Anthropol Año: 2023 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diente Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: Am J Biol Anthropol Año: 2023 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos