La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Determining the age of adult wild dogs (Canis lupus dingo, C-l. domesticus and their hybrids). I. Pulp cavity: tooth width ratios
Auteurs :	K. Kershaw, Auteur ; L. Allen, Auteur ; A. Lisle, Auteur ; K. Withers, Auteur
Type de document :	Article
Dans :	Wildlife Research (32(6) 2005)
Article en page(s) :	581-585
Langues:	Anglais
Résumé :	In order to determine the age of adult wild dogs, we compared two methods ( that of Thomson and Rose (TR method) and that of Knowlton and Whittemore (KW method)) of measuring and calculating pulp cavity : tooth width ratios on upper and lower canine teeth from 68 mixed-sex, known-age wild dogs of 9 months to 13 years of age reared at two localities. Although significant relationships ( P = 0.0001) were found between age and pulp cavity ratios by both methods, the TR ratio calculation and measurement showed heteroscedasity in error variance whereas the KW ratios had a more stable error variance and were normally distributed. The KW method also found significant differences between pulp cavity ratios between teeth of the upper and lower jaws ( P

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