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Variability in individual assessment behaviour and its implications for collective decision-making.

Thomas A O'Shea-Wheller1, Naoki Masuda2, Ana B Sendova-Franks3

  • 1School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TH, UK to13870@bristol.ac.uk.

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|February 3, 2017
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Individual ant nest assessments vary, influencing collective decision-making. This heterogeneity in assessment durations benefits group choices in Temnothorax albipennis ants.

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Temnothorax albipennisbehavioural thresholdsdecision-makingheterogeneityself-organization

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Area of Science:

  • Behavioral Ecology
  • Collective Behavior
  • Insect Social Systems

Background:

  • Collective decision-making is common in social organisms.
  • Less is known about how individual assessment variations impact group choices.

Purpose of the Study:

  • Investigate how individual assessment variability influences collective nest choice in ants.
  • Explore the role of heterogeneous assessments in group decision-making.

Main Methods:

  • Experimental study of Temnothorax albipennis ants choosing between nest sites.
  • Computational modeling of ant nest selection behavior.
  • Analysis of individual nest assessment durations.

Main Results:

  • Individual ants showed significant variation in nest assessment durations for a given nest quality.
  • Ants consistently spent more time in higher-quality nests.
  • Heterogeneous assessments were found to confer benefits in computational models.
  • Nest quality assessments were flexible and influenced by prior experience.

Conclusions:

  • Variability in individual nest assessments is crucial for effective collective decision-making in ants.
  • Heterogeneity, not precise calibration, shapes group behavior.
  • Understanding individual differences is key to understanding group behavior.