title: Age-related tooth wear differs between forest and savanna primates.
abstract: Tooth wear in primates is caused by aging and ecological factors. However, comparative data that would allow us to delineate the contribution of each of these factors are lacking. Here, we contrast age-dependent molar tooth wear by scoring percent of dentine exposure (PDE) in two wild African primate populations from Gabonese forest and Kenyan savanna habitats. We found that forest-dwelling mandrills exhibited significantly higher PDE with age than savanna yellow baboons. Mandrills mainly feed on large tough food items, such as hard-shell fruits, and inhabit an ecosystem with a high presence of mineral quartz. By contrast, baboons consume large amounts of exogenous grit that adheres to underground storage organs but the proportion of quartz in the soils where baboons live is low. Our results support the hypothesis that not only age but also physical food properties and soil composition, particularly quartz richness, are factors that significantly impact tooth wear. We further propose that the accelerated dental wear in mandrills resulting in flatter molars with old age may represent an adaptation to process hard food items present in their environment.
authors.affiliation: Center for the Advanced Study of Hominid Paleobiology, Department of Anthropology, The George Washington University, Washington DC, United States of America; Departament de Biologia Animal - Secció d'Antropologia, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Jordi
authors.initials: J
authors.lastname: Galbany
authors.affiliation: Departamento de Biotecnología, Universidad de Alicante, Alicante, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Romero
authors.affiliation: Departament de Biologia Animal - Secció d'Antropologia, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Mercedes
authors.initials: M
authors.lastname: Mayo-Alesón
authors.affiliation: SODEPAL (Société du Parc d'Exploitation de la Lékédi)-COMILOG Society. Bakoumba, Gabon.
authors.forename: Fiacre
authors.initials: F
authors.lastname: Itsoma
authors.affiliation: Departament de Biologia Animal - Secció d'Antropologia, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Gamarra
authors.affiliation: Departament de Biologia Animal - Secció d'Antropologia, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Pérez-Pérez
authors.affiliation: SODEPAL (Société du Parc d'Exploitation de la Lékédi)-COMILOG Society. Bakoumba, Gabon.
authors.forename: Eric
authors.initials: E
authors.lastname: Willaume
authors.affiliation: Behavioral Ecology & Sociobiology Unit, German Primate Center (DPZ), Göttingen, Germany.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Kappeler
authors.affiliation: Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175, CNRS, Montpellier CEDEX 5, France.
authors.forename: Marie J E
authors.initials: MJ
authors.lastname: Charpentier
mesh_terms: D000375:Aging / Q000473:pathology*; D000818:Animals; D003804:Dentin / Q000473:pathology; D005247:Feeding Behavior; D065928:Forests; D065948:Grassland; D007630:Kenya; D016014:Linear Models; D008334:Mandible / Q000473:pathology; D048528:Mandrillus / Q000033:anatomy & histology; D015999:Multivariate Analysis; D010215:Papio / Q000033:anatomy & histology; D011323:Primates / Q000502:physiology*; D057085:Tooth Wear / Q000473:pathology*
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