Group size and composition influence collective movement in a highly social terrestrial bird

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2020
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European Union (EU): 850859
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eLife. eLife Sciences Publications. 2020, 9, e59902. eISSN 2050-084X. Available under: doi: 10.7554/eLife.59902
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A challenge of group-living is to maintain cohesion while navigating through heterogeneous landscapes. Larger groups benefit from information pooling, translating to greater ‘collective intelligence’, but face increased coordination challenges. If these facets interact, we should observe a non-linear relationship between group size and collective movement. We deployed high-resolution GPS tags to vulturine guineafowl from 21 distinct social groups and used continuous-time movement models to characterize group movements across five seasons. Our data revealed a quadratic relationship between group size and movement characteristics, with intermediate-sized groups exhibiting the largest home-range size and greater variation in space use. Intermediate-sized groups also had higher reproductive success, but having more young in the group reduced home-range size. Our study suggests the presence of an optimal group size, and composition, for collective movement.

Fachgebiet (DDC)
570 Biowissenschaften, Biologie
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collective behaviour, collective movement, group living, movement ecology, social behaviour, group size
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ISO 690PAPAGEORGIOU, Danai, Damien R. FARINE, 2020. Group size and composition influence collective movement in a highly social terrestrial bird. In: eLife. eLife Sciences Publications. 2020, 9, e59902. eISSN 2050-084X. Available under: doi: 10.7554/eLife.59902
BibTex
@article{Papageorgiou2020-11-10Group-51749,
  year={2020},
  doi={10.7554/eLife.59902},
  title={Group size and composition influence collective movement in a highly social terrestrial bird},
  volume={9},
  journal={eLife},
  author={Papageorgiou, Danai and Farine, Damien R.},
  note={Article Number: e59902}
}
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