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Using multilayer network analysis to explore the temporal dynamics of collective behavior

Current Zoology 2021年第1期67卷 71-80页

作者： David N.FISHER Noa p.nter-wollman Department of psychology Neuroscience&BehaviourMcMaster UniversityHamiltonON L8S 4K1Canada School of Biological Sciences University of AberdeenAberdeenAB243FXUK Department of Ecology and Evolutionary Biology University of CaliforniaLos AngelesCAUSA

Social organisms often show collective behaviors such as group foraging or *** behaviors can emerge from interactions between group members and may depend on the behavior of key *** social interactions change over time,collective behaviors may change because these behaviors emerge from interactions among *** the importance of,and growing interest in,the temporal dynamics of social interactions,it is not clear how to quantify changes in interactions over time or measure their ***,the temporal scale at which we should observe changes in social networks to detect biologically meaningful changes is not always *** we use multilayer network analysis to quantify temporal dynamics of social networks of the social spider Stegodyphus dumicola and determine how these dynamics relate to individual and group *** found that social interactions changed over time at a constant *** in both network structure and the identity of a keystone individual was not related to the mean or variance of the collective prey attack *** that maintained a large and stable number of connections,despite changes in network structure,were the boldest individuals in the ***,social interactions and boldness are linked across time,but group collective behavior is not influenced by the stability of the social *** work demonstrates that dynamic social networks can be modeled in a multilayer *** approach may reveal biologically important temporal changes to social structure in other systems.

关键词： collective behavior dynamic network multilayer network multiplex social stability Stegodyphus

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participation in cooperative prey capture and the benefits gained from it are associated with individual personality

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Current Zoology 2017年第5期63卷 561-567页

作者： James L.L. LICHTENSTEIN Colin M. WRIGHT Lauren p. LUSCUSKIE Graham A. MONTGOMERY p.nter-wollman Jonathan N. pRUITT Department of Biological Sciences University of Pittsburgh Pittsburgh PA 15260 USA Department of Ecology and Evolutionary Biology University of California Los Angeles CA 90095 USA Department of Ecology Evolution and Marine Biology University of California Santa Barbara Santa Barbara CA 93106 USA

In animal societies, behavioral idiosyncrasies of the individuals often guide which tasks theyshould perform. Such personality-specific task participation can increase individual task efficiency,thereby improving group performance. While several recent studies have documented group-levelbenefits of within-group behavioral （i.e., personality） diversity, how these benefits are realized atthe individual level is unclear. Here we probe the individual-level benefits of personality-driven taskparticipation in the social spider Stegodyphus dumicola. In S. dumicola, the presence of at leastone highly bold individual catalyzes foraging behavior in shy colony members, and all group con-stituents heavily compete for prey. We assessed boldness by examining how quickly spidersresumed normal movement after a simulated predator attack. We test here whether （1） participantsin collective foraging gain more mass from prey items and （2） whether bold individuals are less re-sistant to starvation than shy spiders, which would motivate the bold individuals to forage ***, we assembled colonies of shy spiders with and without a bold individual, added one preyitem, and then tracked the mass gain of each individual spider after this single feeding event. Wefound that spiders that participated in prey capture （whether bold or shy） gained more mass thannonparticipators, and colonies containing a single bold spider gained more total mass than purelyshy colonies. We also found that bold spiders participated in more collective foraging events andwere more susceptible to starvation than shy spiders, suggesting that the aggressive foraging ofbold individuals may represent a strategy to offset starvation risk. These findings add to the bodyof evidence that animal personality can shape social organization, individual performance, andgroup success.

关键词： animal personality, keystone individuals, social behaviour, task allocation.

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