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dc.contributor.supervisor Henzi, Peter
dc.contributor.author Ducheminsky, Nicholas
dc.date.accessioned 2014-10-10T20:31:25Z
dc.date.available 2014-10-10T20:31:25Z
dc.date.issued 2013
dc.identifier.uri https://hdl.handle.net/10133/3533
dc.description.abstract I used observational data from natural encounters with predators and the controlled pre- sentation of aerial and terrestrial predator alarm calls to assess the hypothesis that these acoustically discernable calls trigger context- and predator-appropriate behaviour in free- ranging vervet monkeys (Chlorocebus pygerythrus). my results, from two study groups in South Africa, show that the modal natural and experimental response was not to initiate escape behaviour, either immediately or in the 10s following an alarm call, but to look at the sound source. When monkeys did take evasive action, which occurred no more fre- quently than doing nothing at all, contextually- inappropriate behaviour (i.e., behaviour that was not appropriate for evading the specific predator type) was as likely to occur as contextually-appropriate behaviour. I also found that the distance at which calls were heard was negatively correlated with the probability of some form of evasive action. I suggest that the large size of our groups, and the consequently greater mean distance at which natural calls were heard, may explain why our animals displayed low levels of active response and less predator-appropriate evasion or vigilance than expected, given previous work on this species (Seyfarth et al. 1980. Science, 210, 801-803). As the frequency and rapidity with which respondents looked towards the loudspeaker confirmed the general salience of the calls, I conclude that the broader social and ecological framework in which calls occur, rather than a simple contextually regular linkage between call types and specific predators, shapes animals responses to calls in this species. en_US
dc.description.sponsorship University of Lethbridge, Natural Sciences and Engineering Research Council en_US
dc.language.iso en_CA en_US
dc.publisher Lethbridge, Alta. : University of Lethbridge, Dept. of Psychology, 2014 en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Alarm calls en_US
dc.subject Vervet monkeys en_US
dc.subject Predators en_US
dc.subject Referential en_US
dc.subject Affect en_US
dc.subject Function en_US
dc.title Alarm calls of vervet monkeys en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Psychology en_US
dc.degree.level Masters en_US
dc.degree.level Masters
dc.proquest.subject 0349 en_US
dc.proquest.subject 0329 en_US
dc.proquestyes Yes en_US


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