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Why Do Male Chimpanzees Defend a Group Range? by Jennifer M. Williams; Gary W. Oehlert; John V. Carlis; Anne E. Pusey is a Agricultural and Biological Sciences article available to read on EtoBox.

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Male chimpanzees, Pan troglodytes, cooperate to defend a community range within which resident females range in smaller core areas. There has been debate over exactly what males are defending, whether mates, territory or both. One hypothesis holds that males are defending mates, and that an increase in community range size will lead directly to the acquisition of more females. However, males frequently attack females as well as males at the edge of the community range. We examined 18 years of observational data on the Gombe chimpanzees to determine the behaviour of males during extragroup encounters, and the consequences of changes in community range size on the number of adult females and indirect measures of food availability. Males were always aggressive to males from other communities, and often attacked adult females, especially those that were not sexually receptive, were older, and/or had more than one offspring. The number of females did not increase with range size, but several measures suggested an increase in food availability with range size. These measures include more time spent in large foraging parties, higher encounter rates with resident females, more encounters w

Who reads Why Do Male Chimpanzees Defend a Group Range??

Author

Jennifer M. Williams; Gary W. Oehlert; John V. Carlis; Anne E. Pusey

Publisher

Elsevier BV

Published

2004

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)