In vivo deciduous dental eruption in LuiKotale bonobos and Gombe chimpanzees

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2021
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Lee, Sean M.
Sutherland, Lauren J.
Murray, Carson M.
Lonsdorf, Elizabeth V.
Arbenz-Smith, Keely
Augusto, Rafael
Brogan, Sean
Canington, Stephanie L.
Lee, Kevin C.
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American Journal of Physical Anthropology. Wiley-Blackwell. 2021, 176(4), pp. 684-691. ISSN 0002-9483. eISSN 1096-8644. Available under: doi: 10.1002/ajpa.24376
Zusammenfassung

Objectives
Existing data on bonobo and chimpanzee dental eruption timing are derived predominantly from captive individuals or deceased wild individuals. However, recent advances in noninvasive photographic monitoring of living, wild apes have enabled researchers to characterize dental eruption in relatively healthy individuals under naturalistic conditions. At present, such data are available for only one population of wild chimpanzees. We report data for an additional population of wild chimpanzees and the first dental eruption data for wild bonobos.

Materials and Methods
We collected photographs and video footage of teeth from the open mouths of wild bonobos and East African chimpanzees of known age from LuiKotale, Democratic Republic of the Congo, and Gombe National Park, Tanzania, respectively. We scored the presence and absence of deciduous teeth from photographs and video footage to characterize deciduous dental eruption timing in these two populations.

Results
Deciduous dental eruption ages in our sample fall within the range of variation previously documented for captive chimpanzees, but eruption ages are later in wild than in captive contexts. We found substantial variation in deciduous canine eruption timing, particularly among bonobos. One bonobo had a deciduous canine present by 227 days old while another did not have a deciduous canine present at 477 days old.

Discussion
Our data indicate that deciduous teeth erupt later in wild individuals than in captive individuals. We also found that deciduous dental eruption timing varies considerably between individuals within our study populations, a pattern that is consistent with previous studies. Future studies should consider sources of variation in deciduous canine eruption timing and relationships with other aspects of life history as additional data become available.

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ISO 690LEE, Sean M., Lauren J. SUTHERLAND, Barbara FRUTH, Carson M. MURRAY, Elizabeth V. LONSDORF, Keely ARBENZ-SMITH, Rafael AUGUSTO, Sean BROGAN, Stephanie L. CANINGTON, Kevin C. LEE, 2021. In vivo deciduous dental eruption in LuiKotale bonobos and Gombe chimpanzees. In: American Journal of Physical Anthropology. Wiley-Blackwell. 2021, 176(4), pp. 684-691. ISSN 0002-9483. eISSN 1096-8644. Available under: doi: 10.1002/ajpa.24376
BibTex
@article{Lee2021decid-56527,
  year={2021},
  doi={10.1002/ajpa.24376},
  title={In vivo deciduous dental eruption in LuiKotale bonobos and Gombe chimpanzees},
  number={4},
  volume={176},
  issn={0002-9483},
  journal={American Journal of Physical Anthropology},
  pages={684--691},
  author={Lee, Sean M. and Sutherland, Lauren J. and Fruth, Barbara and Murray, Carson M. and Lonsdorf, Elizabeth V. and Arbenz-Smith, Keely and Augusto, Rafael and Brogan, Sean and Canington, Stephanie L. and Lee, Kevin C.}
}
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