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Social evolution: slimy cheats pay a price.
Siobhan O'Brien1, Michael A Brockhurst2
1Department of Biosciences, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK; Department of Biology, University of York, York, YO10 5DD, UK.
Current Biology : CB
|May 6, 2015
Summary
Selection on non-social traits can mimic social cheating behaviors. This study reveals how traits unrelated to social interactions can create the appearance of cheating in the social amoeba Dictyostelium discoideum.
Area of Science:
- Evolutionary biology
- Behavioral ecology
- Microbiology
Background:
- Social behaviors evolve through interactions between individuals.
- Distinguishing genuine social cheating from other evolutionary pressures is challenging.
- The social amoeba Dictyostelium discoideum provides a model system for studying social evolution.
Purpose of the Study:
- To investigate the role of non-social trait selection in social dynamics.
- To determine if apparent social cheating can arise from selection on unrelated traits.
- To understand the evolutionary mechanisms in Dictyostelium discoideum.
Main Methods:
- Analyzing genetic variation and its effect on social behaviors.
- Employing population genetics and experimental evolution in Dictyostelium discoideum.
- Quantifying social interactions and reproductive success.
Main Results:
- Selection on non-social traits can lead to phenotypes resembling social cheating.
- The study identified specific non-social traits influencing social success.
- Observed variations in social success were not solely due to direct social cheating.
Conclusions:
- Apparent social cheating in Dictyostelium discoideum can be an artifact of selection on non-social traits.
- This finding challenges traditional interpretations of social dynamics in this organism.
- Understanding indirect selection pressures is crucial for studying social evolution.
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