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Updated: Dec 30, 2025

Analysis of Craniomaxillofacial Malformations in Mice Using Three-dimensional Microcomputed Tomography
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Age estimation in rhesus macaques (Macaca mulatta) based on mandibular dimensions.

Marianne Bouvier1

  • 1Department of Anatomy, Louisiana State University Medical Center, New Orleans.

American Journal of Primatology
|January 24, 2020
PubMed
Summary

A new mandibular measurement technique accurately estimates age in rhesus macaques. This method is fast, cost-effective, and works with fragmentary remains, improving upon existing aging methods.

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Area of Science:

  • Primatology
  • Anthropology
  • Forensic Science

Background:

  • Accurate age estimation in rhesus macaques (Macaca mulatta) is crucial for research and conservation.
  • Current methods like epiphyseal union and dental eruption have limitations, including gaps in age coverage and requirements for complete specimens.

Purpose of the Study:

  • To introduce and validate a novel technique for estimating age in rhesus macaques using mandibular measurements.
  • To highlight the advantages of this new method over existing aging techniques.

Main Methods:

  • Development of a new aging technique based on single mandibular measurements or radiographs.
  • Analysis of mandibular growth as a continuous indicator for age estimation.
  • Application of the technique to incomplete or fragmentary skeletal material.
Keywords:
growthmandiblemonkeys

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Main Results:

  • The new technique provides age estimates with a prediction error of ±5.08 months for males and ±7.29 months for females.
  • This method is quick, inexpensive, and requires only a portion of the mandible.
  • Age estimation is possible throughout the growth period without significant gaps.

Conclusions:

  • Mandibular measurement offers a reliable, efficient, and versatile method for aging rhesus macaques.
  • The technique's applicability to fragmentary remains enhances its utility in paleoanthropological and forensic contexts.
  • This approach represents a significant advancement in non-invasive aging methodologies for non-human primates.