, Volume 9, Issue 4, pp 351–364 | Cite as

Nilgiri langur (Presbytis johnii) territorial behavior

  • Frank E. Poirier


During 1250 hours of observation 84 intertroop encounters were witnessed suggesting territorial behavior. Most of these involved an exchange by adult males of visual and/or vocal signals. Chasing was rare, and when it occurred, it seemed to be “ritual chasing.”

The amount of intertroop male intolerance was unexpected. Arboreal animals occupying upper story vegetation which provided an unobstructed view of the surroundings, could easily avoid contact. It is therefore interesting that males regularly sought other males to display against. Although encounters were frequent, the cost to the participants was minimal because physical contact and injury rarely occurred.

The exact function of Nilgiri langur territories is unclear. Presumably, territorial behavior regulated population dispersal, especially of adult males, and population numbers. Territorial behavior also protected core areas against incursions which indirectly prevented, or minimized, overfeeding and overcrowding.


Adult Male Animal Ecology Regulate Population Core Area Physical Contact 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Japan Monkey Centre 1968

Authors and Affiliations

  • Frank E. Poirier
    • 1
  1. 1.Department of AnthropologyOhio State UniversityUSA

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