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Hair plucking in captive bonobos ( Pan paniscus)

By C. M. Brand, L. F. Marchant

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Abstract

Both wild and captive studies of grooming in non-human primates emphasize the adaptive role of this behavior. Indeed, social grooming is frequently characterized as "social glue" in the life of primates. Grooming behavior is studied to reveal dominance, kin relations, and social networks. Many captive primates, including apes, are observed to over-groom which may result in denuding of individuals. This study focused on a discrete pattern of grooming, specifically hair plucking - a rapid jerking away of the hand or mouth to remove the hair and hair follicle, often accompanied by inspection and consumption of the hair and follicle. This pattern has never been reported for wild bonobos ( Pan paniscus) but is routinely observed in many individuals in captive colonies. Subjects were 17 bonobos (4 wild-born and 13 captive-born) housed at the Columbus Zoo. Data on grooming behavior were collected using all-occurrence sampling. Approximately 21% of self-directed and dyadic grooming bouts involved hair plucking. The four wild-born individuals were never observed to hair pluck. While plucking was not significantly different between males and females, subadult males plucked significantly more than adult males. Self-directed plucking appears to be influenced by dominance - the dominant male and female showed the highest percent of self-directed plucking behavior, 54% and 57%, respectively. This is the first study to document the significance of plucking in bonobo grooming behavior and contributes to discussions of visitors' perception of ape well being.

Publication Title Applied Animal Behaviour Science
Volume 171
Pages 192-196
ISBN/ISSN 0168-1591
DOI 10.1016/j.applanim.2015.08.002
Language English
Author Address Department of Anthropology, University of Oregon, Eugene, Oregon, USA.cbrand2@uoregon.edu
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Tags
  1. Animal behavior
  2. Animals
  3. Chimpanzees
  4. Females
  5. Great ape
  6. Grooming
  7. Hair
  8. Males
  9. Mammals
  10. mouth
  11. peer-reviewed
  12. Primates
  13. Research
  14. vertebrates
  15. Zoos
Badges
  1. peer-reviewed