Defended versus undefended home range size of carnivores,ungulates and primates |
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Authors: | JWA Grant CA Chapman KS Richardson |
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Institution: | (1) Department of Biology, Concordia University, 1455 de Maisonneuve Boulevard West, H3G 1M8 Montreal, Quebec, Canada;(2) Department of Anthropology, Peabody Museum, Harvard University, 02138 Cambridge, MA, USA |
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Abstract: | Summary We tested the hypothesis that undefended home ranges are larger than defended home ranges using data collected from the literature for three groups of mammals. A matched-pairs analysis of populations within species or species within genera showed that undefended home ranges were larger than defended home ranges for carnivores and male ungulates, but not for primates. Primates may have been an exception because they violated a key assumption of the hypothesis, that defence costs increase with the size of the defended area. Undefended home ranges were 5.4 and 15.2 times larger than defended home ranges for carnivores and male ungulates, respectively. Whether or not a home range is defended is an important source of variation that should be included in future studies of home range size.
Correspondence to: J.W.A. Grant |
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