Environmental Biology of Fishes

, Volume 17, Issue 4, pp 281-290

First online:

Reconciling the two methods of measuring upper lethal temperatures in fishes

  • D. Marc KilgourAffiliated withDepartment of Mathematics, Wilfrid Laurier University
  • , Robert W. McCauleyAffiliated withDepartment of Biology, Wilfrid Laurier University

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The models developed here provide a precise quantitative description of the course of the thermal destruction experienced by fish during a slow heating experiment. However, a broader view of this work is that each of the abrupt transfer and slow heating techniques determines experimentally a functional relationship; the interdependence of these functional relationships is the actual focus of this study. In particular, it is shown that data from either type of experiment can be used to predict the observations from an experiment of the other type under certain assumptions.


Critical thermal maxima Mathematical models Thermal acclimation Upper incipient lethal temperatures