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Related Experiment Videos

A lifetime perspective on foraging and mortality.

Jonathan Yearsley1, Ian M Hastings, Iain J Gordon

  • 1Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK. j.yearsley@mluri.sari.ac.uk

Journal of Theoretical Biology
|June 19, 2002
PubMed
Summary
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Animals must balance food intake benefits against mortality risks for optimal lifetime reproduction. Maximal food consumption is not always best, as risks impact future reproductive success.

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Behavioral Ecology

Background:

  • Food intake is crucial for animal reproduction but can incur significant mortality risks.
  • These risks can negatively affect reproductive success across an animal's lifespan.

Purpose of the Study:

  • To model the lifetime trade-off between the benefits and mortality costs of food intake.
  • To determine the optimal food intake rate for animals considering lifetime reproductive success.

Main Methods:

  • Development of a simple animal foraging model.
  • Analysis of lifetime reproductive success under varying mortality risks associated with food consumption.

Main Results:

  • The optimal food intake rate is not maximal, requiring a balance between immediate gains and future costs.

Related Experiment Videos

  • Lifespan and the nature of mortality risk (per unit time vs. per unit food) influence this balance.
  • Mortality risk per unit of food consumed has significant implications for feeding behavior and intake regulation.

    • Conclusions:

    • Animals must strategically manage food intake to maximize lifetime reproductive success.
    • Understanding different mortality risks is crucial for explaining feeding behavior and food intake regulation in animals.