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Geometrical Games between a Host and a Parasitoid
The American Naturalist
|March 29, 2018
Summary
Leafminers evade parasitoids by modifying their mines, creating a safer environment. This strategy, akin to a game, reduces parasitism risk by controlling the search arena.
Area of Science:
- Ecology
- Behavioral Ecology
- Game Theory
Background:
- Leafminers face high mortality from parasitoids due to conspicuous mines.
- The leafminer-parasitoid interaction is analogous to the princess-monster game, involving predator-prey strategies.
- Parasitoid detection is a significant challenge for leafminer survival.
Purpose of the Study:
- To quantify how leafminers modify their environment to reduce parasitism risk.
- To explore the complexity introduced when the prey (leafminer) alters the predator's (parasitoid) search arena.
- To evaluate the adaptive value of leafminer mine development patterns.
Main Methods:
- Comparison of observed leafminer behavior and mine patterns with simulation models.
- Analysis of parasitism risk based on leafminer feeding patterns and position within the mine.
- Utilizing game theory principles to model the leafminer-parasitoid interaction.
Main Results:
- Leafminer feeding creates 'feeding windows' crucial for parasitoid oviposition.
- Parasitism risk is influenced by the mine structure and leafminer's location.
- Leafminers create a central uneaten area, acting as a shield and reducing parasitism.
Conclusions:
- Leafminers actively control their environment to minimize parasitoid encounters.
- By shaping the mine, leafminers influence the 'rules of the game' with their parasitoids.
- Mine modification is an adaptive strategy enhancing leafminer survival against parasitism.
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