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Who is coordinating collective movements in black and gold howler monkeys?

Primates : Volume 54, Issue 1, January 2013

Who is coordinating collective movements in black and gold howler monkeys?

Content Provider	Springer Nature Link
Author	Fernández, Vanina A. Kowalewski, Martín Zuni, Gabriel E.
Copyright Year	2013
Abstract	Decisions about when and where to travel are likely to have a strong influence on the feeding, ecology, and foraging strategies of individual primates living in a cohesive social group. Specifically, given differences in age, sex, reproductive status, or social dominance, particular group members may benefit from remaining at their present location while others may benefit from traveling to another area of their range to feed or rest. In this study, we present data on movement coordination in two groups of wild black and gold howler monkeys inhabiting Isla Brasilera (27º 20′S and 58º 40′W) in northern Argentina. We examine how factors such as sex, age, reproductive status, and dominance affect patterns of group movement coordination at feeding or resting sites, and in the context of intergroup encounters. Two groups were followed five days a month from sunrise to sunset during June to November 2004. Using focal and scan sampling techniques, we recorded 262 group displacements, the identity of the individual initiating and leading displacement, and the identity of the first individual to arrive at feeding, resting, or intergroup encounter sites. We found that overall age was the only factor that influenced group coordination: adults led more often (94.5 %) than immature individuals (5.5 %) in both groups. We did not find differences among adults. However, we found that males lead more often than females at intergroup encounters, consistent with the male-mate defense hypothesis. The distributed leadership pattern among adults observed in this study may suggest that adult individuals make equally shared consensus decisions. This pattern should be further examined using this individual-level approach in other populations of black and gold howlers, other species of howlers, and in other atelines in which within-group social tolerance is the rule rather than the exception.
Starting Page	191
Ending Page	199
Page Count	9
File Format	PDF
ISSN	00328332
Journal	Primates
Volume Number	54
Issue Number	2
e-ISSN	16107365
Language	English
Publisher	Springer Japan
Publisher Date	2013-02-03
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Leadership Group coordination Collective behavior Decision making Alouatta caraya Zoology Animal Ecology Behavioural Sciences Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology

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