Hydrobiologia

, Volume 79, Issue 2, pp 141–145 | Cite as

A laboratory study on the thermal tolerance of four southeastern stream insect species (Trichoptera, Ephemeroptera)

  • Steven J. deKozlowski
  • Dewey L. BuntingII
Article

Abstract

The acute thermal tolerances of four southeastern stream insect species, Ephemerella invaria (Walker), Stenonema ithaca (Clemens and Leonard), Symphitopsyche morosa (Hagun), and Brachycentrus lateralis (Say) were determined using an artificial stream enclosure. All species were acclimated at 10°C for 72 hours prior to instantaneous immersion into heated water for 96 hours. Percent mortality was recorded and the temperature at which 50% mortality occurred determined (LT5o). Data were subjected to standard statistical analysis.

Thermal tolerance values were compared between species tested and to results from previous investigations using similar methodologies. The evolution and life histories of these species were also discussed in relation to their thermal tolerance values.

Keywords

Thermal tolerance temperature benthic insects Trichoptera Ephemeroptera 

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Copyright information

© Dr W. Junk Publishers 1981

Authors and Affiliations

  • Steven J. deKozlowski
    • 1
  • Dewey L. BuntingII
    • 1
  1. 1.Ecology ProgramUniversity of TennesseeKnoxville

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