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Interruptions to foraging and learning in a changing environment.

Dall1, Mcnamara, Cuthill

  • 1School of Biological Sciences, University of Bristol

Animal Behaviour
|May 18, 1999
PubMed
Summary

Animals foraging in unpredictable environments must balance learning about food sources with the risk of interruptions. Increased interruption probability causes a sudden shift from exploring unknown food to exploiting known food, impacting information acquisition.

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Area of Science:

  • Behavioral Ecology
  • Foraging Theory
  • Animal Behavior

Background:

  • Foraging animals face environments with variable resource profitability.
  • Animals must sample resources to track profitability but risk interruptions during this process.
  • External factors like predators, weather, and competitors disrupt foraging and information gathering.

Purpose of the Study:

  • To model foraging decisions in stochastic environments with interruptions.
  • To investigate how interruption probability affects the trade-off between exploiting known and exploring unknown resources.
  • To determine the impact of interruptions on information acquisition and maintenance.

Main Methods:

  • Developed a dynamic foraging model.
  • Incorporated two options: one with constant reward, one stochastic with time-varying mean.

Related Experiment Videos

  • Modeled interruptions with unpredictable timing and duration.

    • Main Results:

    • Low interruption probability favors extensive sampling of the unknown option.
    • Increased interruption probability triggers a sharp transition to foraging solely on the known option.
    • Interruption effects depend on the value of learning and interruption duration.

    Conclusions:

    • Foraging strategies are highly sensitive to the probability and impact of interruptions.
    • Interruption risk fundamentally alters the economics of information gathering in foraging animals.
    • The model provides insights into adaptive information updating under environmental uncertainty and disruption.