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Laboratory selection for the comparative physiologist.

A G Gibbs1

  • 1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. agibbs@mail.arl.arizona.edu

The Journal of Experimental Biology
|October 3, 1999
PubMed
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Laboratory evolution experiments in comparative physiology reveal rapid adaptation in microbial, invertebrate, and vertebrate models. These studies offer insights into physiological mechanisms but can yield unexpected results due to complex lab environments.

Area of Science:

  • Comparative physiology
  • Evolutionary biology
  • Laboratory evolution experiments

Background:

  • Comparative physiology often studies trait evolution across species.
  • Laboratory evolution offers controlled environments for studying adaptation.
  • Microbial, invertebrate, and vertebrate models are used.

Purpose of the Study:

  • To review recent findings in laboratory selection experiments in comparative physiology.
  • To highlight the strengths and limitations of laboratory evolution studies.
  • To suggest future directions for this research approach.

Main Methods:

  • Utilizing microbial, invertebrate, and vertebrate models.
  • Implementing well-defined selective conditions.
  • Employing replicated selected populations and unselected controls.

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Main Results:

  • Physiological systems evolve rapidly under laboratory selection.
  • Observed evolutionary responses can differ from interspecific comparative studies.
  • Unexpected results can arise from complex laboratory conditions (e.g., behavior, life stages).

Conclusions:

  • Laboratory evolution is a powerful tool for understanding adaptive value and physiological mechanisms.
  • Careful consideration of environmental complexity is crucial for interpreting results.
  • This approach provides unique insights not always obtainable through other methods.