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Modelling information exchange in worker-queen conflict over sex allocation
1University of Groningen, Theoretical Biology Group, Centre for Ecological and Evolutionary Studies, PO Box 14, 9750AA Haren, the Netherlands. i.r.pen@rug.nl
Proceedings. Biological Sciences
|October 26, 2005
Summary
Queen-worker conflict over sex allocation is modeled with information exchange. Worker observation of queen strategy can lead to counter-intuitive, male-biased sex ratios, challenging previous models of social insect reproduction.
Area of Science:
- Evolutionary biology
- Behavioral ecology
- Game theory
Background:
- Social insects exhibit complex sex allocation patterns.
- Conflicts between queens and workers influence these patterns.
- Previous models often assume limited information exchange.
Purpose of the Study:
- To investigate queen-worker conflict over sex allocation.
- To model the impact of information exchange on sex ratios.
- To compare simultaneous, sequential, and negotiated conflict models.
Main Methods:
- Theoretical modeling of sex allocation strategies.
- Incorporation of worker observation of queen strategy.
- Analysis of three conflict scenarios: simultaneous, sequential, and negotiated.
Main Results:
- Simultaneous model yields intermediate sex ratios (between queen and worker optima).
- Sequential model (worker observes queen) produces less female-biased, often male-biased ratios.
- Negotiated model results in sex ratios intermediate to the other two models.
Conclusions:
- Information exchange significantly alters predicted sex ratios in social insects.
- Worker knowledge of queen strategy can lead to male-biased outcomes.
- Findings offer new perspectives on observed sex allocation and suggest experimental tests.