Brain size/body weight in the dingo (Canis dingo): comparisons with domestic and wild canids
Bradley P. Smith A D F , Teghan A. Lucas B C , Rachel M. Norris D and Maciej Henneberg E
+ Author Affiliations
- Author Affiliations
A School of Health, Medical and Applied Sciences, Central Queensland University, Wayville, SA 5034, Australia.
B Department of Archaeology, Flinders University, Bedford Park, SA 5042, Australia.
C School of Medical Sciences, Anatomy, University of New South Wales, Sydney, NSW 2052, Australia.
D School of Animal and Veterinary Sciences, University of Adelaide, Roseworthy, SA 5371, Australia.
E Adelaide Medical School, The University of Adelaide, Adelaide, SA 5000, Australia.
F Corresponding author. Email: b.p.smith@cqu.edu.au
Australian Journal of Zoology 65(5) 292-301 https://doi.org/10.1071/ZO17040
Submitted: 2 August 2017 Accepted: 19 March 2018 Published: 12 April 2018
Abstract
Endocranial volume was measured in a large sample (n = 128) of free-ranging dingoes (Canis dingo) where body size was known. The brain/body size relationship in the dingoes was compared with populations of wild (Family Canidae) and domestic canids (Canis familiaris). Despite a great deal of variation among wild and domestic canids, the brain/body size of dingoes forms a tight cluster within the variation of domestic dogs. Like dogs, free-ranging dingoes have paedomorphic crania; however, dingoes have a larger brain and are more encephalised than most domestic breeds of dog. The dingo’s brain/body size relationship was similar to those of other mesopredators (medium-sized predators that typically prey on smaller animals), including the dhole (Cuon alpinus) and the coyote (Canis latrans). These findings have implications for the antiquity and classification of the dingo, as well as the impact of feralisation on brain size. At the same time, it highlights the difficulty in using brain/body size to distinguish wild and domestic canids.
Additional keywords: brain, Canidae, domestication, encephalisation, feralisation.
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