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Vol. 73, No. 2-3, 2002
Issue release date: March–June 2002 (August 2002)
Folia Primatol 2002;73:104–115

Duetting in the Titi Monkey Callicebus cupreus: Structure, Pair Specificity and Development of Duets

Müller A.E. · Anzenberger G.
Anthropological Institute and Museum, University of Zürich, Switzerland;b California Regional Primate Research Center, University of California,Davis, Calif., USA

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Duets from a total of 6 female and 6 male titi monkeys (Callicebus cupreus) were analysed in order to provide an in-depth analysis of the duet structure, to investigate whether duets are pair specific and to examine whether duets of newly formed pairs differ from those of established pairs. Callicebus duets are composed of alternately uttered male and female contributions. Duets were pair specific as a result of a summation of individual attributes of the two mates rather than due to unidirectional or reciprocal song adaptation by mates. The two examined newly formed pairs produced species-typical duets from the first day on, but their duets showed greater variability in sequence durations than those of established pairs.

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