Vocal communication of wild bonnet macaques (Macaca radiata) |
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Authors: | G Hohmann |
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Institution: | (1) Indian Institute of Science, Bangalore;(2) Present address: Department of Primate Behaviour, Max-Planck-Institute of Psychiatry, Kraepelinstrasse 2, P. O. Box 401240, 8000 Munchen 40, Germany |
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Abstract: | Field observations and spectrographic analyses of sound recordings of South Indian bonnet macaques revealed a vocal repertoire
of at least 25 basic patterns. The repertoire consists of well separated sound classes and acoustic categories connected by
structural intergradation. Besides structural variations within and between different elements of the repertoire, the vocal
system ofMacaca radiata is characterized by regular combinations of particular basic patterns. These combinations occurred not only between calls
of similar structure and function but also between calls usually emitted in entirely different social contexts. According
to the qualitative analysis, sex-specific asymmetries of the vocal behaviour were less pronounced than age-dependent characteristics.
The comparison of clear call vocalizations ofMacaca radiata andM. fuscata revealed significant species-specific differences on the structural and the behavioural level. Evaluations of the structural
features of alarm calls of various macaque species imply marked differences between members of thefascicularis group andsinica group on one hand and thesilenus group andarctoides group on the other. |
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Keywords: | Bonnet macaques Macaca radiata Vocal repertoire Vocal behaviour |
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