NDLI: Social Network Influences Decision Making During Collective Movements in Brown Lemurs (Eulemur fulvus fulvus)

Content Provider	Springer Nature Link
Author	Jacobs, Armand Sueur, Cédric Deneubourg, Jean Louis Petit, Odile
Copyright Year	2011
Abstract	Many animal species live as a group and must therefore move as such. Several authors have suggested that the mechanisms underlying collective movements in primate species appear to rely on complex cognitive skills, given their high level of cognitive abilities. However, recent studies have highlighted the fact that complex patterns do not necessarily imply complex mechanisms. We used a modeling approach to investigate the patterns of collective movement in a semi-free-ranging group of brown lemurs. We recorded via digital video cameras the order and joining latencies of the 11 individuals of the group during the departure time of spontaneous group movements. We then assessed whether mimetic mechanisms or the existence of a leader were underlying conditions for the joining process by testing 5 computer models relying respectively on 5 hypotheses: the independence of individuals, an anonymous mimetism, a mimetism according to kinship, a mimetism according to affiliation, and eventually the existence of a leader. We found that departure latencies, associations, and the order of individuals at departure time could all be explained by the mimetism according to affiliation model. Thus, an individual’s decision to join the collective movement or not depended on the decision taken by its preferred social partners. These results show the importance of social parameters in primate decision making and that the high cohesion displayed by the group members might not be constrained merely by ecological factors such as predation or foraging consideration.
Starting Page	721
Ending Page	736
Page Count	16
File Format	PDF
ISSN	01640291
Journal	International Journal of Primatology
Volume Number	32
Issue Number	3
e-ISSN	15738604
Language	English
Publisher	Springer US
Publisher Date	2011-03-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Affiliation Agent-based model Decision making Eulemur fulvus Self-organization Social network Human Genetics Zoology Anthropology Animal Genetics and Genomics Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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