Abstract
During decision − making, animals consider not only the current but also the past quality of options. For example, when humans evaluate performance (e.g. sales) of employees, they do not only consider the average performance but also the trend of performance; ascending performance is often viewed as more favorable than descending performance. In our study, we test if non-human animals have a similar bias when they are evaluating options using house-hunting by the acorn ant, Temnothorax curvispinosus, as our model system. Our data show that when nest-site quality is static over time, ant colonies tend to prefer the nest site which was better (i.e. darker) between two nest options. However, when the nest quality changes over time—one improves and the other worsens—more colonies choose the low-quality, but improving, nest than the high-quality, but worsening, nest. These results suggest that a continuous change of option quality may influence evaluation. We discuss alternative explanations for our results, possible mechanisms, and potential ecological benefits for keeping track of the nest-site quality.
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Data availability
The data and R code are available online (doi:https://datadryad.org/stash/share/gokTGmFJjlBptNW-CC8SKtINOhbFDoBdgRqFLKYsSeE).
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Acknowledgements
T.S. was supported by NSF grants (#2118012 and 2310983) and Templeton World Charity Foundation (#30059) and K.T received a CURO (Center for Undergraduate Research Opportunities) Fellowship at University of Georgia to conduct this study.
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Tyler, K., Vassie, D. & Sasaki, T. Does the history of option quality affect nest site choice in the Acorn ant?. Insect. Soc. (2024). https://doi.org/10.1007/s00040-024-00969-0
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DOI: https://doi.org/10.1007/s00040-024-00969-0