Locomotor compromises maintain group cohesion in baboon troops on the move

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When members of a group differ in locomotor capacity, coordinating collective movement poses a challenge: some individuals may have to move faster (or slower) than their preferred speed to remain together. Such compromises have energetic repercussions, yet research in collective behaviour has largely neglected locomotor consensus costs. Here, we integrate high-resolution tracking of wild baboon locomotion and movement with simulations to demonstrate that size-based variation in locomotor capacity poses an obstacle to the collective movement. While all baboons modulate their gait and move-pause dynamics during collective movement, the costs of maintaining cohesion are disproportionately borne by smaller group members. Although consensus costs are not distributed equally, all group-mates do make locomotor compromises, suggesting a shared decision-making process drives the pace of collective movement in this highly despotic species. These results highlight the importance of considering how social dynamics and locomotor capacity interact to shape the movement ecology of group-living species.

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570 Biowissenschaften, Biologie
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ISO 690HAREL, Roi, J. Carter LOFTUS, Margaret C. CROFOOT, 2021. Locomotor compromises maintain group cohesion in baboon troops on the move. In: Proceedings of the Royal Society of London, Series B : Biological Sciences. Royal Society of London. 2021, 288(1955), 20210839. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2021.0839
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@article{Harel2021Locom-54567,
  year={2021},
  doi={10.1098/rspb.2021.0839},
  title={Locomotor compromises maintain group cohesion in baboon troops on the move},
  number={1955},
  volume={288},
  issn={0962-8452},
  journal={Proceedings of the Royal Society of London, Series B : Biological Sciences},
  author={Harel, Roi and Loftus, J. Carter and Crofoot, Margaret C.},
  note={Article Number: 20210839}
}
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