title: Seeds, browse, and tooth wear: a sheep perspective.
abstract: While grazing as a selective factor towards hypsodont dentition on mammals has gained a lot of attention, the importance of fruits and seeds as fallback resources for many browsing ungulates has caught much less attention. Controlled-food experiments, by reducing the dietary range, allow for a direct quantification of the effect of each type of items separately on enamel abrasion. We present the results of a dental microwear texture analysis on 40 ewes clustered into four different controlled diets: clover alone, and then three diets composed of clover together with either barley, corn, or chestnuts. Among the seed-eating groups, only the barley one shows higher complexity than the seed-free group. Canonical discriminant analysis is successful at correctly classifying the majority of clover- and seed-fed ewes. Although this study focuses on diets which all fall within a single dietary category (browse), the groups show variations in dental microwear textures in relation with the presence and the type of seeds. More than a matter of seed size and hardness, a high amount of kernels ingested per day is found to be correlated with high complexity on enamel molar facets. This highlights the high variability of the physical properties of the foods falling under the browsing umbrella.
authors.affiliation: iPHEP UMR 7262 (CNRS & Université de Poitiers) 86073 Poitiers Cedex 9 France.
authors.forename: Anusha
authors.initials: A
authors.lastname: Ramdarshan
authors.affiliation: iPHEP UMR 7262 (CNRS & Université de Poitiers) 86073 Poitiers Cedex 9 France.
authors.forename: Cécile
authors.initials: C
authors.lastname: Blondel
authors.affiliation: Institut P'prime UPR 3346 (CNRS ENSMA & Université de Poitiers) 86962 Futuroscope Chasseneuil Cedex France.
authors.forename: Noël
authors.initials: N
authors.lastname: Brunetière
authors.affiliation: Institut P'prime UPR 3346 (CNRS ENSMA & Université de Poitiers) 86962 Futuroscope Chasseneuil Cedex France.
authors.forename: Arthur
authors.initials: A
authors.lastname: Francisco
authors.affiliation: Ferme Expérimentale du Mourier Institut de l'Elevage 87800 St Priest Ligoure France; Centre Interrégional d'Information et de Recherche en Production Ovine Ferme Expérimentale du Mourier 87800 Saint Priest Ligoure France.
authors.forename: Denis
authors.initials: D
authors.lastname: Gautier
authors.affiliation: iPHEP UMR 7262 (CNRS & Université de Poitiers) 86073 Poitiers Cedex 9 France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Surault
authors.affiliation: iPHEP UMR 7262 (CNRS & Université de Poitiers) 86073 Poitiers Cedex 9 France.
authors.forename: Gildas
authors.initials: G
authors.lastname: Merceron
keywords: Controlled‐food trials; dental microwear texture analysis; diet; enamel; ruminants