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

Territoriality: The relation of ranging pattern and home range size to defendability, with an... 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 that defendability depends on the ability of an animal to monitor the boundaries of its range in order to detect potential intruders and introduce an index of defendability (D) which is the ratio of observed daily path length (d) to an area equal to the diameter (d′) of a circle with area equal to home range area of the animal. This index is sensitive only to extreme deviation from circular shape. 3. Review of the literature on primate ranging reveals that all territorial groups for which data are available have an index of 1.0 or greater, and that few nonterritorial species have an index of 1.0 or greater. 4. Regression analysis of the relationship of daily path length to feeding group weight and foliage in the diet reveals that both feeding group weight and foliage in the diet account for a large proportion of the variance in daily path length, and that territorial and nonterritorial groups do not differ in day range for a given group weight and diet. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behavioral Ecology and Sociobiology Springer Journals

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

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References (55)

Publisher
Springer Journals
Copyright
Copyright © 1979 by Springer-Verlag
Subject
Life Sciences; Behavioral Sciences; Zoology; Animal Ecology
ISSN
0340-5443
eISSN
1432-0762
DOI
10.1007/BF00293673
Publisher site
See Article on Publisher Site

Abstract

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 that defendability depends on the ability of an animal to monitor the boundaries of its range in order to detect potential intruders and introduce an index of defendability (D) which is the ratio of observed daily path length (d) to an area equal to the diameter (d′) of a circle with area equal to home range area of the animal. This index is sensitive only to extreme deviation from circular shape. 3. Review of the literature on primate ranging reveals that all territorial groups for which data are available have an index of 1.0 or greater, and that few nonterritorial species have an index of 1.0 or greater. 4. Regression analysis of the relationship of daily path length to feeding group weight and foliage in the diet reveals that both feeding group weight and foliage in the diet account for a large proportion of the variance in daily path length, and that territorial and nonterritorial groups do not differ in day range for a given group weight and diet.

Journal

Behavioral Ecology and Sociobiology – Springer Journals

Published: Aug 18, 2004

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