Show simple item record

dc.contributor.authorSmith, Tanya M
dc.contributor.authorKupczik, Kornelius
dc.contributor.authorMachanda, Zarin
dc.contributor.authorSkinner, Matthew M
dc.contributor.authorZermeno, John P
dc.date.accessioned2018-06-29T04:11:57Z
dc.date.available2018-06-29T04:11:57Z
dc.date.issued2012
dc.identifier.issn0002-9483
dc.identifier.doi10.1002/ajpa.22009
dc.identifier.urihttp://hdl.handle.net/10072/172785
dc.description.abstractDental enamel thickness has received considerable attention in ecological models of the adaptive significance of primate morphology. Several authors have theorized that the degree of enamel thickness may reflect selective pressures related to the consumption of fallback foods (dietary items that may require complex processing and/or have low nutritional value) during times of preferred food scarcity. Others have speculated that enamel thickness reflects selection during mastication of foods with particular material properties (i.e., toughness and hardness). Orangutans prefer ripe fruit when available, but show interspecific and sex differences in the consumption of fallback foods (bark, leaves, and figs) and other preferred foods (certain seeds). Bornean orangutans (Pongo pygmaeus) have also been reported to masticate more mechanically demanding foods than Sumatran orangutans (Pongo abelii). To test these ecological models, we assessed two‐dimensional enamel thickness in orangutan full dentitions using established histological and virtual quantification methods. No significant differences in average enamel thickness (AET) were found between species. We found significant differences in the components of enamel thickness indices between sexes, with males showing greater enamel‐dentine junction lengths and dentine core areas, and thus relatively thinner enamel than females. Comparisons of individuals of known sex and species revealed a dentition‐wide trend for Bornean females to show greater AET than Sumatran females. Differences between small samples of males were less evident. These data provide only limited support for ecological explanations of enamel thickness patterns within great ape genera. Future studies of dietary ecology and enamel thickness should consider sex differences more systematically.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.relation.ispartofpagefrom417
dc.relation.ispartofpageto426
dc.relation.ispartofissue3
dc.relation.ispartofjournalAmerican Journal of Physical Anthropology
dc.relation.ispartofvolume147
dc.subject.fieldofresearchEvolutionary Biology not elsewhere classified
dc.subject.fieldofresearchEvolutionary Biology
dc.subject.fieldofresearchAnthropology
dc.subject.fieldofresearchArchaeology
dc.subject.fieldofresearchcode060399
dc.subject.fieldofresearchcode0603
dc.subject.fieldofresearchcode1601
dc.subject.fieldofresearchcode2101
dc.titleEnamel thickness in Bornean and Sumatran orangutan dentitions
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorSmith, Tanya M.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record