Buccal dental-microwear and dietary ecology in a free-ranging population of mandrills (Mandrillus sphinx) from southern Gabon

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Title: Buccal dental-microwear and dietary ecology in a free-ranging population of mandrills (Mandrillus sphinx) from southern Gabon
Authors: Percher, Alice M. | Romero, Alejandro | Galbany, Jordi | Nsi Akoue, Gontran | Pérez-Pérez, Alejandro | Charpentier, Marie J.E.
Research Group/s: Grupo de Inmunología, Biología Celular y del Desarrollo
Center, Department or Service: Universidad de Alicante. Departamento de Biotecnología
Keywords: Buccal surface | Dental-microwear | Dietary ecology | Free-ranging population | Mandrills
Knowledge Area: Biología Celular
Issue Date: 26-Oct-2017
Publisher: Public Library of Science (PLoS)
Citation: Percher AM, Romero A, Galbany J, Nsi Akoue G, Pérez-Pérez A, Charpentier MJE (2017) Buccal dental-microwear and dietary ecology in a free-ranging population of mandrills (Mandrillus sphinx) from southern Gabon. PLoS ONE12(10): e0186870. https://doi.org/10.1371/journal.pone.0186870
Abstract: Analyses of dental micro- and macro-wear offer valuable information about dietary adaptations. The buccal surface of the teeth does not undergo attrition, indicating that dental microwear may directly inform about food properties. Only a few studies have, however, investigated the environmental and individual factors involved in the formation of such microwear in wild animals. Here, we examine variation of buccal microwear patterns of mandibular molars in a large free-ranging population of mandrills (Mandrillus sphinx). We first explore the influence of seasonality and individual’s sex, age and tooth macrowear–expressed as the percent of dentine exposure (PDE)–on six microwear variables. Second, we analyze the interplay between individual’s diet and PDE. In a last analysis, we revisit our results on mandrills in the light of other primate’s microwear studies. We show that the average buccal scratch length and the frequency of vertical buccal scratches are both higher during the long dry season compared to the long rainy season, while we observe the inverse relationship for disto-mesial scratches. In addition, females present more disto-mesial scratches than males and older individuals present higher scratch density, a greater proportion of horizontal scratches but a lower proportion of vertical scratches than young animals. PDE yields similar results than individual’s age confirming earlier results in this population on the relationship between age and tooth macrowear. Because seasonality and individual characteristics are both known to impact mandrills’ diet in the study population, our results suggest that buccal microwear patterns may inform about individual feeding strategies. Furthermore, PDE increases with the consumption of potentially abrasive monocotyledonous plants, independently of the individuals’ age, although it is not affected by food mechanical properties. Finally, buccal scratch densities by orientation appear as relevant proxies for discriminating between different primate taxa.
Sponsor: The Deutsche Forschungsgemeinschaft grant (DFG, KA 1082-20-1), the “Station d’Etudes en Ecologie Globale” (INEE-CNRS), the “Laboratoire International Associé” (CIRMF and INEE-CNRS), granted to MJEC, and the Spanish "Ministerio de Ciencia e Innovación" (grant numbers CGL2011-22999 and CGL2014-52611) granted to APP, have all contributed to the achievement of this study.
URI: http://hdl.handle.net/10045/70731
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0186870
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Percher et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Peer Review: si
Publisher version: http://dx.doi.org/10.1371/journal.pone.0186870
Appears in Collections:INV - Grupo de Inmunología - Artículos de Revistas

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