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Resource availability influences global social network properties in Gunnison’s prairie dogs (Cynomys gunnisoni)

In: Behaviour
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  • 1 Balaton Limnological Institute, Centre for Ecological Research, Tihany, Hungary
  • | 2 Evolutionary Systems Research Group, Centre for Ecological Research, Tihany, Hungary
  • | 3 Loránd Eötvös University, Budapest, Hungary
  • | 4 School of Natural Resources and Environment, University of Arizona, Tucson, AZ, USA
  • | 5 Department of Biology, Duke University, Durham, NC, USA
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Abstract

Increasingly we are discovering that the interactions between individuals within social groups can be quite complex and flexible. Social network analysis offers a toolkit to describe and quantify social structure, the patterns we observe, and evaluate the social and environmental factors that shape group dynamics. Here, we used 14 Gunnison’s prairie dogs networks to evaluate how resource availability and network size influenced four global properties of the networks (centralization, clustering, average path length, small word index). Our results suggest a positive correlation between overall network cohesion and resource availability, such that networks became less centralized and cliquish as biomass/m2 availability decreased. We also discovered that network size modulates the link between social interactions and resource availability and is consistent with a more ‘decentralized’ group. This study highlights the importance of how individuals modify social cohesions and network connectedness as a way to reduce intragroup competition under different ecological conditions.

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