Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
Anatomy
Sexual Dimorphism of Craniodental Morphology in the Raccoon Dog Nyctereutes procyonoides from South Korea
Sang-In KIMSatoshi SUZUKIJinwoo OHDaisuke KOYABUTatsuo OSHIDAHang LEEMi-Sook MINJunpei KIMURA
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2012 Volume 74 Issue 12 Pages 1609-1616

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Abstract

We examined sexual dimorphism in the craniodental traits of the raccoon dog Nyctereutes procyonoides from South Korea. Univariate comparisons of skull (cranium and mandible) and dental measurements revealed a small extent of sexual dimorphism in some measurements. The most indicative dimorphic measurements were the breadths of the upper and lower canines which were around 8% larger in male specimens on average. On the other hand, multivariate analyses using only skull traits showed slightly a clearer separation between sexes than those using only dental ones. This discrepancy may be derived from a higher variability in dental traits than in those of the skull. In conclusion, sexual dimorphism within N. procyonoides of South Korea is present, but was not so pronounced as for other local populations. However, measurements showing significant sexual dimorphism varied between different localities. This suggests that the selective forces acting upon craniodental morphology of each sex vary between populations of the species.

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