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Positional behavior in five sympatric Old World monkeys

D L Gebo1, C A Chapman

  • 1Department of Anthropology, Northern Illinois University, DeKalb 60115, USA.

American Journal of Physical Anthropology
|May 1, 1995
PubMed
Summary
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Five Old World monkey species in Uganda exhibit distinct positional behaviors. Colobines leap more and sit frequently, while cercopithecines stand more, with body size not influencing these primate behaviors.

Area of Science:

  • Primatology
  • Behavioral Ecology
  • Zoology

Background:

  • Old World monkeys exhibit diverse positional behaviors and habitat use.
  • Understanding these behaviors is crucial for primate ecology and conservation.

Purpose of the Study:

  • To document and compare positional behavior and habitat use in five Old World monkey species.
  • To investigate the influence of body size and phylogenetic group on these behaviors.

Main Methods:

  • Focal animal observations of positional behavior and habitat use.
  • Data collected on five species (Cercopithecus ascanius, C. mitis, Cercocebus albigena, Colobus badius, C. guereza) in Kibale Forest, Uganda.
  • Analysis of quadrupedalism, leaping, climbing, sitting, and standing frequencies and contexts.

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Main Results:

  • All species use similar positional behaviors but with varying frequencies.
  • Colobines leap more and sit more (90%) than cercopithecines, who stand more frequently.
  • Smaller species climb more and leap less, contrary to expectations; most leaps are short (<1m).

Conclusions:

  • Positional behavior varies between colobine and cercopithecine groups, influenced by phylogeny rather than body size.
  • Species show preferences for medium-sized supports, regardless of availability.
  • Few consistent trends in primate positional behavior and habitat use emerge across species and body sizes.