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A pilot study of sexual dimorphism in the head morphology of domestic dogs

By J. J. Carrasco, D. Georgevsky, M. Valenzuela, P. D. McGreevy

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Abstract

The dog ( Canis lupus familiaris) displays more morphological diversity than any other species. It is a direct descendant of the gray wolf ( Canis lupus), but shows remarkable behavioral and morphological differences. It has been suggested that differences in skull shape that relate to brain shape and retinal ganglion cell distribution may predict behavioral differences. The aim of this pilot study was to assess head morphology in common breeds for evidence of sexual dimorphism in head length, head width, and the ratio of the 2: cephalic index (CI). When males of 80 breeds studied were compared with females, sexual dimorphism (differences in a t-test at the level of P

Publication Title Journal of Veterinary Behavior: Clinical Applications and Research
Volume 9
Issue 1
Pages 43-46
ISBN/ISSN 1558-7878
DOI 10.1016/j.jveb.2013.09.004
Language English
Author Address Faculty of Veterinary Science, University of Sydney, New South Wales 2006, Australia.paul.mcgreevy@sydney.edu.au
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Tags
  1. Animal anatomy
  2. Animal behavior
  3. Animals
  4. Brain
  5. Canidae
  6. Canine
  7. Carnivores
  8. Dogs
  9. Eyes
  10. Ganglia
  11. Head
  12. Health
  13. Mammals
  14. morphology
  15. morphometrics
  16. peer-reviewed
  17. Pets and companion animals
  18. Sexual dimorphism (Animals)
  19. skull
  20. vertebrates
  21. Wolves
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  1. peer-reviewed