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Flight respiration and energetics.

J F Harrison1, S P Roberts

  • 1Department of Biology, Arizona State University, Tempe 85287-1501, USA. j.harrison@asu.edu

Annual Review of Physiology
|June 9, 2000
PubMed
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Flying animals generally possess higher aerobic metabolic capacities than runners, with variations across species. Flight efficiency is influenced by factors like muscle efficiency, temperature, speed, and body size.

Area of Science:

  • Comparative physiology
  • Animal locomotion
  • Bioenergetics

Background:

  • Flight in animals is a complex behavior requiring specialized physiological traits.
  • Understanding the energetic demands of flight is crucial for comprehending animal adaptation and evolution.

Purpose of the Study:

  • To comparatively analyze physiological traits enabling animal flight.
  • To investigate the relationship between metabolic capacity, muscle function, and flight efficiency in various taxa.
  • To explore factors influencing flight energetics, including temperature, speed, mass, and genetic effects.

Main Methods:

  • Comparative physiological analysis of flying and running animals.
  • Examination of aerobic metabolic capacities and power output efficiencies.

Related Experiment Videos

  • Investigation of factors affecting flight respiration and energetics, such as air temperature, flight speed, and body mass.

    • Main Results:

    • Fliers typically exhibit higher aerobic metabolic capacities than runners, with significant inter-taxa variation.
    • High metabolic rates in fliers correlate with high muscle cycle frequencies and lower metabolic power conversion efficiency.
    • Body size influences flight energetics, with larger animals showing decreased mass-specific metabolism and increased efficiency.

    Conclusions:

    • Physiological traits like aerobic capacity and muscle efficiency are key determinants of flight capability.
    • Environmental factors (temperature, speed) and intrinsic factors (body size, genetics) significantly modulate flight energetics.
    • Comparative studies reveal diverse strategies animals employ to achieve and sustain flight.