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Age Estimation of African Lions Panthera leo by Ratio of Tooth Areas.


ABSTRACT: Improved age estimation of African lions Panthera leo is needed to address a number of pressing conservation issues. Here we present a formula for estimating lion age to within six months of known age based on measuring the extent of pulp closure from X-rays, or Ratio Of tooth AReas (ROAR). Derived from measurements taken from lions aged 3-13 years for which exact ages were known, the formula explains 92% of the total variance. The method of calculating the pulp/tooth area ratio, which has been used extensively in forensic science, is novel in the study of lion aging. As a quantifiable measure, ROAR offers improved lion age estimates for population modeling and investigations of age-related mortality, and may assist national and international wildlife authorities in judging compliance with regulatory measures involving age.

SUBMITTER: White PA 

PROVIDER: S-EPMC4835051 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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Age Estimation of African Lions Panthera leo by Ratio of Tooth Areas.

White Paula A PA   Ikanda Dennis D   Ferrante Luigi L   Chardonnet Philippe P   Mesochina Pascal P   Cameriere Roberto R  

PloS one 20160418 4


Improved age estimation of African lions Panthera leo is needed to address a number of pressing conservation issues. Here we present a formula for estimating lion age to within six months of known age based on measuring the extent of pulp closure from X-rays, or Ratio Of tooth AReas (ROAR). Derived from measurements taken from lions aged 3-13 years for which exact ages were known, the formula explains 92% of the total variance. The method of calculating the pulp/tooth area ratio, which has been  ...[more]

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