Territoriality: The relation of ranging pattern and home range size to defendability, with an analysis of territoriality among primate species

摘要: 1. Existing theory suggests that territoriality will evolve when resources are limited and defendable, but defendability has seldom been analyzed quantitatively. 2. Here we argue depends on the ability of an animal to monitor boundaries its range in order detect potential intruders introduce index (D) which is ratio observed daily path length (d) area equal diameter (d′) a circle with home animal. This sensitive only extreme deviation from circular shape. 3. Review literature primate ranging reveals all territorial groups for data available have 1.0 or greater, few nonterritorial species greater. 4. Regression analysis relationship feeding group weight foliage diet both account large proportion variance length, do not differ day given diet.