a
School of Psychology and Neuroscience, University of St.Andrews, St.Andrews, United Kingdom
b San Diego Zoo Global Institute for Conservation Research, 15600 San Pasqual Valley Road, Escondido, CA, United States
c Aix Marseille Université, Centre National de la Recherche Scientifique, Laboratoire de Psychologie Cognitive, Marseille, France
b San Diego Zoo Global Institute for Conservation Research, 15600 San Pasqual Valley Road, Escondido, CA, United States
c Aix Marseille Université, Centre National de la Recherche Scientifique, Laboratoire de Psychologie Cognitive, Marseille, France
Abstract
Wild and captive
capuchin monkeys will anoint themselves with a range of strong smelling
substances including millipedes, ants, limes and onions. Hypotheses for
the function of the behaviour range from medicinal to social. However,
capuchin monkeys may anoint in contact with other individuals, as well
as individually. The function of social anointing has also been
explained as either medicinal or to enhance social bonding. By
manipulating the abundance of an anointing resource given to two groups
of tufted capuchins, we tested predictions derived from the main
hypotheses for the functions of anointing and in particular, social
anointing. Monkeys engaged in individual and social anointing in similar
proportions when resources were rare or common, and monkeys holding
resources continued to join anointing groups, indicating that social
anointing has functions beyond that of gaining access to resources. The
distribution of individual and social anointing actions on the monkeysâ ™
bodies supports a medicinal function for both individual and social
anointing, that requires no additional social bonding hypotheses.
Individual anointing targets hard-to-see body parts that are harder to
groom, whilst social anointing targets hard-to-reach body parts. Social
anointing in capuchins is a form of mutual medication that improves
coverage of topically applied anti-parasite medicines.
ISSN: 20452322Source Type: Journal
Original language: English
DOI: 10.1038/srep15030Document Type: Article
Publisher: Nature Publishing Group