Original Paper

Behavioral Ecology and Sociobiology

, Volume 66, Issue 5, pp 653-667

The alarm call system of wild black-fronted titi monkeys, Callicebus nigrifrons

  • Cristiane CäsarAffiliated withSchool of Psychology, University of St AndrewsConservation, Ecology and Animal Behaviour Group, Department of Post-Graduate Studies in Zoology, Prédio 41, Pontifícia Universidade Católica de Minas GeraisInstituto Cultural Inhotim
  • , Richard ByrneAffiliated withSchool of Psychology, University of St Andrews
  • , Robert J. YoungAffiliated withConservation, Ecology and Animal Behaviour Group, Department of Post-Graduate Studies in Zoology, Prédio 41, Pontifícia Universidade Católica de Minas Gerais
  • , Klaus ZuberbühlerAffiliated withSchool of Psychology, University of St Andrews Email author 

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Abstract

Upon encountering predators, many animals produce specific vocalisations that alert others and sometimes dissuade the predators from hunting. Callicebus monkeys are known for their large vocal repertoire, but little is known about the function and meaning of most call types. We recorded a large number of natural predator responses from five different groups of black-fronted titi monkeys in their Atlantic forest habitat in South Eastern Brazil. When detecting predatory threats, adult group members responded with call sequences that initially consisted of two brief, high-pitched calls with distinct frequency contours. Call A was mainly given to raptors but also to predatory capuchin monkeys and other threats within the canopy, while call B was given to predatory or non-predatory disturbances on the ground. In later parts of the sequences, we also recorded a high-pitched unmodulated call C and various low-pitched loud calls. Results therefore suggest that calls A and B provide listeners with rapid and reliable information about the general classes of danger experienced by the caller, while obtaining more specific information through other call types and combinations and behavioural responses. We discuss these findings in relation to current evolutionary theory of primate communication.

Keywords

Call sequences New Platyrrhini Semantic Predation Cognition