Ontogenetic bases of canine dimorphism in anthropoid primates

Bibliographic Data

ID8313591
AuthorsR Leigh (0000-0001-6844-7122, University of Illinois Urbana-Champaign, corresponding author), Steven R Leigh, J M Setchell (0000-0002-5782-1235, Centre International de Recherches Médicales de Franceville), Laurel S Buchanan (University of Illinois Urbana-Champaign)
Year2005
Volume127
Issue3
Pages296-311
Publication date2005-07-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueAmerican Journal of Physical Anthropology (JOURNAL)
Journal identifiersISSN: 0002-9483 • E-ISSN: 1096-8644
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ajpa.20096
PMID15584072
OpenAlexW2044498873
LanguageEN
Citations received17
References cited58

This study tests hypotheses regarding the ontogeny of canine tooth size dimorphism in five anthropoid primate species (Saguinus fuscicollis, Macaca mulatta, Cercocebus atys, Papio hamadryas, and Mandrillus sphinx). Canine measurements and chronological age data are analyzed to determine if bimaturism, a sex difference in the age at which eruption ceases, accounts for canine tooth sexual dimorphism. Canine height measurements are evaluated through a variety of regression techniques. Results show a lack of sexual dimorphism in Saguinus. While size dimorphism is absent in the deciduous teeth of all species analyzed, the adult teeth in cercopithecines become increasingly dimorphic through ontogeny. Female adult tooth eruption regularly precedes male tooth eruption, and regression-based eruption trajectories for both sexes intersect at about the age at which the female tooth reaches adult size. Males erupt the tooth later and more rapidly than females. Males also reach a larger adult size than females by erupting the tooth for much longer periods of time. Bimaturism is primary in the production of dimorphism, but rates of eruption show modest variation. These results point to the scheduling of sexual selection through intermale competition as a primary factor determining male eruption timing, rates of eruption, and adult size. Life history factors may play a role in determining the relations between the scheduling of intrasexual competition and canine eruption. Female contributions to sexual dimorphism are apparent in these species, suggesting that similar levels of dimorphism can be attained through diverse ontogenetic pathways

Biology · Canine tooth · Ontogeny · Primate · Sexual dimorphism · Sexual selection · Zoology · Anatomy · Animal Behavior and Welfare Studies · Ecology · Primate Behavior and Ecology · Wildlife Ecology and Conservation

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