Abstract # 34:

Scheduled for Thursday, June 20, 2013 11:45 AM-12:00 PM: Session 4 (San Geronimo Ballroom C) Oral Presentation


THE INFLUENCE OF INTERTROOP ENCOUNTERS ON THE SPATIO-TEMPORAL DYNAMICS OF TWO TROOPS OF FREE-RANGING VERVET MONKEYS (CHLOROCEBUS AETHIOPS)

B. Thomas1,2, L. Barrett1,2 and P. Henzi1,2
1University of Lethbridge, B836 Henzi Lab, University Hall, 4401 University Dr W, Lethbridge, Alberta T1K 3M4, USA, 2Applied Behavioural Ecology and Ecosystems Unit, University of South Africa
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     Vervet monkeys (Chlorocebus aethiops) are generally a territorial species. In our study population, troop territories overlap extensively with neighbouring troops, and intertroop encounters (ITEs) are frequent. In this study, we aim to quantify the influence of said ITEs on the spatio-temporal dynamics of two troops of vervet monkeys. Over a period of nine months, we collected data on two large troops of vervet monkeys (RSTN = 70, RBMN = 50) on the Samara Game Reserve, South Africa. We developed a novel method to collect data on individual vervet spatial position throughout the course of a day using handheld GPS-equipped data loggers. We analyzed arrival and departure data from the area of ITE, by calculating angle of travel prior to encounter, angle of deflection post encounter and speed of travel. Further, we examined the location of ITEs in regards to their position within the home ranges of the focal troops (core vs. edge) and the intensity of space use of that area prior and post ITEs. Our results demonstrate shifts in the spatial patterns of home range use and focal troop movement following repeated ITEs with neighbouring groups.