, Volume 35, Issue 6, pp 751–752 | Cite as

Desiccation in the black dragon,Hagenius brevistylus Selys

  • Barbara Jean Tracy
  • C. R. Tracy
  • D. S. Dobkin


Hagenius brevistylus lost mass by evaporation in a moderately desiccating environment at the rate of 20.4 mg h−1, and died of desiccation in less than 1 day at a body mass of 79.8% of their normally hydrated mass. It was estimated thatHagenius minimally would have to consume the equivalent of 60% of its body mass each day to meet its daily water requirements. This amount of food is equivalent to that necessary to power flight of a dragonfly for 4.6h.


Evaporation Hydrate Water Requirement Daily Water Power Flight 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 3.
    C.R. Tracy, B.J. Tracy and D.S. Dobkin, Physiol. Zool., in press (1979).Google Scholar
  2. 4.
    N.S. Church, J. exp. Biol.37, 171 (1960).Google Scholar
  3. 5.
    V.A. Tucker, Am. Scient.63, 413 (1975).Google Scholar

Copyright information

© Birkhäuser Verlag 1979

Authors and Affiliations

  • Barbara Jean Tracy
    • 1
  • C. R. Tracy
    • 1
  • D. S. Dobkin
    • 1
  1. 1.Department of Zoology and EntomologyColorado State UniversityFort CollinsUSA

Personalised recommendations