Synergistic Benefits of Group Search in Rats

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2020
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Horicsányi, Attila
Kubinyi, Enikő
Vásárhelyi, Gábor
Vicsek, Tamás
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Current Biology ; 30 (2020), 23. - pp. 4733-4738.e4. - Cell Press. - ISSN 0960-9822. - eISSN 1879-0445
Abstract
Locating unpredictable but essential resources is a task that all mobile animals have to perform in order to survive and reproduce. Research on search strategies has focused largely on independent individuals [1-3], but many organisms display collective behaviors, including during group search and foraging [4-6]. One classical experimental search task, informing studies of navigation, memory, and learning, is the location of a reward in a confined, complex maze setting [7, 8]. Rats (Rattus norvegicus) have been paradigmatic in psychological and biological studies [9, 10], but despite rats being highly social [11, 12], their group search behavior has not been investigated. Here, we explore the decision making of rats searching individually, or in groups, for a reward in a complex maze environment. Using automated video tracking, we find that rats exhibit-even when alone-a partially systematic search, leading to a continuous increase in their chance of finding the reward because of increased attraction to unexplored regions. When searching together, however, synergistic group advantages arise through integration of individual exploratory and social behavior. The superior search performances result from a strategy that represents a hierarchy of influential preferences in response to social and asocial cues. Furthermore, we present a computational model to compare the essential factors that influence how collective search operates and to validate that the collective search strategy increases the search efficiency of individuals in groups. This strategy can serve as direct inspiration for designing computational search algorithms and systems, such as autonomous robot groups, to explore areas inaccessible to humans.
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570 Biosciences, Biology
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collective animal behavior, group search, decision making, rats in a maze
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Cite This
ISO 690NAGY, Mate, Attila HORICSÁNYI, Enikő KUBINYI, Iain D. COUZIN, Gábor VÁSÁRHELYI, Andrea FLACK, Tamás VICSEK, 2020. Synergistic Benefits of Group Search in Rats. In: Current Biology. Cell Press. 30(23), pp. 4733-4738.e4. ISSN 0960-9822. eISSN 1879-0445. Available under: doi: 10.1016/j.cub.2020.08.079
BibTex
@article{Nagy2020-12Syner-51098,
  year={2020},
  doi={10.1016/j.cub.2020.08.079},
  title={Synergistic Benefits of Group Search in Rats},
  number={23},
  volume={30},
  issn={0960-9822},
  journal={Current Biology},
  pages={4733--4738.e4},
  author={Nagy, Mate and Horicsányi, Attila and Kubinyi, Enikő and Couzin, Iain D. and Vásárhelyi, Gábor and Flack, Andrea and Vicsek, Tamás}
}
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