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Tooth wear in Amboseli Baboons
- 1. Jordi Galbany, Laia Dotras, Jeanne Altmann, Alejandro Pérez-Pérez, Susan C. Alberts http://dentalecology.blogspot.com – jordigalbany@gmail.com Tooth wear causes in Amboseli baboons • Dental ecology • Amboseli Baboon Research Project • Occlusal tooth wear • Interproximal tooth wear
- 2. Tooth morphology is a good indicator of feeding ecology and behavior in extant and fossil primates, including hominids. • Studies the interaction between teeth and the environment, which can affect individual fitness. • Includes: functional morphology, tooth wear, dental microwear, enamel microstructure, pathology, stable isotope analysis… • We are in front of a new way to interpret primate teeth, including morphology, ecology and behavior data (Cuozzo & Sauther, 2010 - Am J Phys Anthropol). Dental ecology
- 4. Tooth wear and tooth loss linked to abrasive fallback foods (tamarind fruits) in Lemur catta from Beza Mahafaly (Cuozzo & Sauther 2006).
- 6. How do we study baboons? Amboseli Baboon Research Project
- 7. Amboseli Baboon Research Project • Baboons studied since 1971. • Project directed by Jeanne Altmann (Princeton University) and Susan Alberts (Duke University) • More than 1,300 individuals studies over the last 40 years • Nowadays over 300 animals are studied daily, individually recognized, from 5 social groups in the same population • Methods: 1) behavior observation, 2) genetic analysis, 3) hormonal analysis, and 4) darting fieldwork • Since 2006, around 170 individuals have been captured, and obtained its biometry, blood samples, tooth moulds, etc… http://www.princeton.edu/~baboon/
- 9. Baboons are individually recognized, and its behavior is registered
- 10. Proportion of feeding time (1999-2006)
- 17. Occlusal tooth wear Adriano - 9,88 years M3 1.491% M2 8.906% M1 16.102% P4P3 “Unless the factors that control tooth wear remain so poorly understood, the mammalian dentition cannot really be understood” (Lucas, 2004: 182- 183).
- 18. What can cause tooth wear in Amboseli baboons? • We hypothesized some predictor variables that could potentially cause tooth wear (I): Age: real age of known individuals. Tooth wear as a function of age in several species. Individual percent of time consuming corms (USOs), because abrasive foods can wear down enamel. Total number of registered feeding points: 69,213. Mean per female: 1,281.
- 19. What can cause tooth wear in Amboseli baboons? • We hypothesized some predictor variables that could potentially cause tooth wear (II): Importance of parental care: we measured the total number of months that females spent with dependent offspring during their life (“eating for two’’). Social dominance rank, because predicts priority of access to resources and impacts many life history traits. High ranking females would have access to the highest quality foods.
- 20. Galbany J et al (2011) Am J Phys Anthropol Occlusal tooth wear n=54 n=45
- 21. Galbany J et al (2011) Am J Phys Anthropol Occlusal tooth wear
- 22. Galbany J et al (2010) Folia Primatol Mesio-distal diameters (length) in postcanine teeth as a function of age • Shape differences • Interproximal tooth wear significant in females (upper and lower P4 and M1) Interproximal tooth wear * * * * *
- 23. Relative Crown Relief Complexity / OPC Rhinoceros Surfer Manipulator
- 24. Departament d’Educació i Universitats de la Generalitat de Catalunya – Beatriu de Pinós 2006 Beca Floquet de Neu 2007/08 Barcelona De Serveis Municipals S.A. CGL2007-60802/BTE Biology Department Tooth wear causes in Amboseli baboons Jordi Galbany, Laia Dotras, Jeanne Altmann, Alejandro Pérez-Pérez, Susan C. Alberts http://dentalecology.blogspot.com – jordigalbany@gmail.com Conclusions • Amboseli baboons present occlusal and interproximal tooth wear as a function of age. • The consumption of abrasive foods (corms - USOs) also explains occlusal tooth wear variability. • Future analyses, as relative crown relief and cusp complexity, will determine how tooth wear is related to a decrease of dental functionality and fitness. Thanks for your attention!