Abstract # 4619 Poster # 181:

Scheduled for Friday, June 21, 2013 07:00 PM-09:00 PM: Session 21 (SG Foyer ABC) Poster Presentation


EXPLORING INDIVIDUAL VOCAL SIGNATURES IN ALARM CALLS AND BODY SIZE OF CAPTIVE GEOFFROY'S MARMOSETS (CALLITHRIX GEOFFROYI)

M. M. Petracca
University of Nebraska-Lincoln, Department of Psychology, 238 Burnett Hall, Lincoln, Nebraska 68588, USA
line
     Vocal signatures may allow individuals to distinguish among conspecifics. I previously determined that marmoset alarm calls could also be distinguished by individual using four acoustic parameters: duration, and starting, maximum, and ending peak frequency. Here I used a mixed-model ANOVA to further explore this data and asses the possible confound of body size. I used the previously recorded alarm calls (n=219) from 6 captive marmosets, as well as weights (grams) measured within a week of the recorded calls. Results show significant differences between individual marmosets (p<.05, consistent with previous Discriminant Function Analysis results), significant differences between the call parameters (p<.05), and an interaction between individual and call parameters (p<.05). Correlations and plots of call signature profiles show that body size is not likely to account for the individual differences in call structure. In addition, call duration and body size show different patterns of relationship across the different parameters of the calls. These exploratory findings show that in order to create a more accurate model of individual vocal signatures, a large number of calls, individual body weights, and additional call samples over time are needed.