Abstract # 2401 Poster # 115:

Scheduled for Friday, June 20, 2008 05:00 PM-07:00 PM: Session 12 (Ball Rooms A and B) Poster Presentation

Vocal Behavior of Adult Titi Monkeys (Callicebus cupreus) in a Separation Paradigm

C. D. Kitzmann, D. E. Main, S. P. Mendoza and K. L. Bales
University of California, Davis, Psychology Department, One Shields Ave, Davis, CA 95616, USA
     Social animals often possess a contact call, shared within a species or social group, to facilitate contact between separated group members. Titi monkeys, a monogamous primate, produce an intergraded series of contact calls including whistles, squeaks, and chirps; however, the specific functions of these different call types are not clear. The goal of this study was to identify the call type(s) used by titis when separated from their group members. Subjects were 17 adult titi monkeys (nine males, eight females) living in long-term pairs (some with offspring) at the California National Primate Research Center. We removed pairs from their home cages and recorded vocalizations from each subject when it was able to see but not touch its pair-mate. We recorded a total of 1,187 vocalizations. The most common vocalization recorded (93%) was the squeak, which was the only call type recorded from seven monkeys. Whistles were less common (7%) and often occurred in combination with squeaks. The percentage of whistles produced was significantly correlated between pair-mates [r=0.80, n=8, p=0.02], and males tended to produce more whistles than females. The squeak vocalization may function to facilitate contact between separated group members. Future research will assess the responses of separated pair-mates to playbacks of their partners’ squeak vocalizations. This research supported by the base grant to the CNPRC and the Good Nature Institute.