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Related Experiment Video

Updated: Jun 24, 2026

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
06:57

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice

Published on: November 11, 2021

Inbreeding, energy use and condition.

T Ketola1, J S Kotiaho

  • 1Department of Biological and Environmental Science, Centre of Excellence in Evolutionary Research, University of Jyväskylä, Jyväskylä, Finland. tketola@jyu.fi

Journal of Evolutionary Biology
|March 27, 2009
PubMed
Summary
This summary is machine-generated.

Energy allocation ability, a measure of condition, is crucial for fitness. Inbreeding negatively impacts this ability and metabolic traits in crickets, suggesting high resting metabolic rate may indicate lower quality.

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Area of Science:

  • Physiology
  • Evolutionary Biology
  • Animal Behavior

Background:

  • Fitness is linked to energy allocation between life-history traits.
  • Energy allocation ability, or condition, constrains fitness.
  • A proposed measure of condition is the difference between total energy budget and maintenance metabolism.

Purpose of the Study:

  • To investigate if energy allocation ability can be used as a measure of condition.
  • To examine the relationship between metabolic traits, condition, and fitness in crickets.
  • To analyze the effects of inbreeding on metabolic traits and energy allocation ability.

Main Methods:

  • Measuring resting metabolic rate and metabolism during forced exercise in Gryllodes sigillatus crickets.
  • Experimentally manipulating the degree of inbreeding within a pedigree.
  • Analyzing inbreeding depression and heritability of metabolic and condition traits.

Main Results:

  • Inbreeding increased maintenance metabolism but did not significantly affect total energy budget.
  • Inbreeding led to a decreased energy allocation ability.
  • Metabolic traits showed strong inbreeding depression and low heritability, while traditional condition indices were unaffected.
  • High resting metabolic rate was associated with lower quality, contrary to common assumptions.

Conclusions:

  • Energy allocation ability, estimated via metabolic measurements, serves as a valid indicator of condition.
  • Inbreeding negatively impacts energy allocation ability and associated metabolic traits in crickets.
  • The study challenges the notion that high resting metabolic rate is always indicative of high quality, suggesting it may reflect poor condition.