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What does sexual trait FA tell us about stress?
Trends in Ecology & Evolution
|March 16, 2000
Summary
Fluctuating asymmetry (FA) is thought to increase with stress, particularly in sexual traits. However, recent studies show this relationship is inconsistent, with little evidence for sexual traits being especially sensitive to stress.
Area of Science:
- Evolutionary biology
- Animal behavior
- Genetics
Background:
- Fluctuating asymmetry (FA) is widely believed to increase under environmental and genetic stress.
- FA in sexual traits is often considered a sensitive indicator of genetic and phenotypic quality.
Purpose of the Study:
- To investigate the relationship between fluctuating asymmetry and stress.
- To determine if sexual traits are particularly responsive to stress compared to other traits.
Main Methods:
- Review of recent experimental studies on fluctuating asymmetry and stress.
- Analysis of evidence regarding the responsiveness of sexual traits to stress.
Main Results:
- The relationship between fluctuating asymmetry and stress is inconsistent across studies.
- There is limited evidence to support the hypothesis that sexual traits are especially sensitive to stress.
Conclusions:
- The widely accepted view of FA as a direct indicator of stress, especially in sexual traits, may require re-evaluation.
- Further research is needed to understand the complex interplay between stress, FA, and trait development.
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