Use of pulp cavity/tooth width ratios to determine the age of adult wild dogs (Canis lupus dingo, C. l. domesticus and their hybrids)

Kershaw, K. and Allen, L. and Lisle, A. and Withers, K. (2005) Use of pulp cavity/tooth width ratios to determine the age of adult wild dogs (Canis lupus dingo, C. l. domesticus and their hybrids). In: 22nd Annual Conference of the Australian and New Zealand Society for Comparative Physiology and Biochemistry (ANZSCPB 2005), 09-11 Dec 2005, Dunedin, New Zealand.


Determining the age of wild dogs destroyed in control programs is useful management practice. We compared the
pulp cavity: tooth width ratio measurement and ratio calculation of the Thomson and Rose (TR) method to that of
the Knowlton and Whittemore (KW) method on upper and lower canine teeth from a CSIRO collection of 68
skulls. The skulls were from mixed gender, known-age wild dogs ranging in age from 9 months to 13 years and
reared at either Alice Springs or Canberra. The relationships between age and pulp cavity ratios for both TR and
KW methods were significant (p=0.0001). The KW ratios exhibited stable error variance and normal distribution,
whereas the TR ratios exhibited heteroscedasity in error variance. Significant differences in KW pulp cavity ratios
were detected between upper and lower jaw teeth (p<0.0001) and gender (p=0.01) but not geographic origin. The
KW method of calculating pulp cavity as a proportion of tooth width measured 15 mm from the root tip and
averaged over both upper canines, is the more accurate of the two methods for estimating the age of adult wild

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Abstract 78. Conference publication consists of only the abstracts of papers presented at the conference.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:29
Last Modified: 15 Jun 2016 05:45
Uncontrolled Keywords: wild dogs; dingoes; age; pulp cavity: tooth width ratio
Fields of Research : 06 Biological Sciences > 0608 Zoology > 060806 Animal Physiological Ecology
07 Agricultural and Veterinary Sciences > 0707 Veterinary Sciences > 070702 Veterinary Anatomy and Physiology

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