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A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
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Optimal locomotor strategy for predator avoidance in fish prey.

Ashley N Peterson1, Matthew J McHenry1

  • 1Department of Ecology and Evolutionary Biology, University of California, Irvine, 321 Steinhaus Hall, Irvine, CA 92697, USA.

The Journal of Experimental Biology
|May 21, 2026
PubMed
Summary

Prey damselfish survive predator encounters by swimming towards lionfish, exploiting their slow turning ability. This agent-based model reveals novel predator-prey interaction strategies.

Keywords:
Agent-based modelingAvoidance strategyPredator–prey interactions

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Area of Science:

  • Ecology
  • Behavioral Biology
  • Biomathematics

Background:

  • Predator-prey interactions are significantly influenced by the control and mechanics of locomotion.
  • Prey survival strategies often focus on evasion, but many prey avoid encounters without evasive maneuvers.

Purpose of the Study:

  • To investigate prey locomotor strategies for avoiding predator encounters without evasive maneuvers.
  • To develop an agent-based numerical model simulating damselfish (Chromis viridis) avoiding lionfish (Pterois volitans).

Main Methods:

  • An agent-based numerical model was created for individual damselfish prey and lionfish predators.
  • Predator pursuit was modeled using a pure-pursuit strategy.
  • Prey avoidance was simulated using intermittent swimming biased away from the threat.

Main Results:

  • Simulation results for interaction duration were statistically similar to experimental measurements.
  • Prey survival against faster predators was maximized by swimming towards the predator.
  • This strategy capitalizes on the predator's limited capacity to change direction.

Conclusions:

  • Agent-based modeling is a powerful tool for understanding predator-prey dynamics.
  • Prey can employ counterintuitive strategies, like approaching predators, to enhance survival.
  • Locomotor mechanics and behavioral biases are critical determinants in predator-prey interactions.