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Related Experiment Videos

Growth versus lifespan: perspectives from evolutionary ecology.

Neil B Metcalfe1, Pat Monaghan

  • 1Division of Environmental and Evolutionary Biology, Graham Kerr Building, Institute of Biomedical and Life Sciences, Glasgow University, Glasgow G12 8QQ, UK. n.metcalfe@bio.gla.ac.uk

Experimental Gerontology
|September 5, 2003
PubMed
Summary

Fast growth offers ecological benefits but may shorten lifespan. This review examines the trade-offs between rapid growth and longevity, exploring potential mechanisms and fitness implications.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Physiology

Background:

  • Rapid growth confers ecological advantages like predator avoidance and enhanced reproduction.
  • Accelerated early-life growth is linked to negative consequences, including reduced longevity and impaired later performance.

Purpose of the Study:

  • To review evidence for trade-offs between growth rate and lifespan within individuals.
  • To explore potential physiological mechanisms underlying these trade-offs.
  • To discuss the fitness implications of reduced lifespan and the 'grow fast and die young' strategy.

Main Methods:

  • Literature review assessing existing studies on growth rate, lifespan, and fitness.
  • Analysis of potential physiological mechanisms linking accelerated growth to reduced longevity.

Related Experiment Videos

  • Discussion of experimental approaches to elucidate intra-specific relationships.

    • Main Results:

    • Evidence suggests a potential trade-off between rapid growth and longevity across taxa.
    • Physiological mechanisms underlying this trade-off require further investigation.
    • Fitness consequences depend on environmental context, potentially favoring rapid growth if it maximizes reproductive success.

    Conclusions:

    • The relationship between growth rate, lifespan, and fitness is complex and influenced by environmental factors.
    • Further research with controlled variables and ecologically relevant fitness measures is needed.
    • Understanding these trade-offs is crucial for evolutionary and ecological studies.