4.5 Article

Should I stay or should I go? How activity synchronization affects fission decisions

期刊

BIOLOGY LETTERS
卷 18, 期 1, 页码 -

出版社

ROYAL SOC
DOI: 10.1098/rsbl.2021.0410

关键词

activity synchronization; fission-fusion dynamics; decision-making process; Ateles

资金

  1. Chester Zoo
  2. National Geographic Society
  3. Consejo Nacional por la Ciencia y la Tecnologia (CONACyT) [490429, I0101/152/2014 C-133/2014]

向作者/读者索取更多资源

Group-living animals need to deal with conflicting interests to maintain cohesion. This study shows that activity synchronization plays a significant role in fission decisions, with non-synchronized activities leading to more frequent fission events. Additionally, fission events are more likely to occur when spider monkeys are traveling during synchronized activities.
Group-living animals need to deal with conflicting interests to maintain cohesion. When the costs of doing so outweigh the benefits, the group may (temporarily) split into two or more subgroups. Conflicting interests can concern what activity to pursue or the direction of travel. Temporary group separation is a common feature in species with a high degree of fission-fusion dynamics. We investigated the role activity synchronization played in fission decisions in a spider monkey group living in the Otoch Ma'ax Yetel Kooh Nature Reserve, Yucatan, Mexico. For 21 months, we recorded every fission event occurring in the followed subgroup, as well as the subgroup activity. We classified the activity as 'synchronized' when at least 75% of subgroup members performed the same activity (resting, foraging, socializing or travelling); otherwise, we classified it as 'non-synchronized'. We found that fission events occurred more often when the activity was non-synchronized. In addition, when the activity was synchronized, fission events occurred more often when spider monkeys were travelling than when they were engaged in other subgroup activities. Our findings highlight the role of conflicting interests over the activity to pursue and travel direction in fission decisions.

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