Abstract

The toxicity of phenol to the freshwater crustacean Asellus aquaticus was assessed by use of three response criteria (immobilization, paralysis and mortality). Median response times were longer (i.e. phenol appeared less toxic) at higher temperatures and reasons for this are discussed. Immobilized animals were able to recover from brief periods of exposure if placed in clean water, the rate of recovery being dependant upon exposure time, exposure concentration and temperature during exposure and recovery periods. The implications of this study for an understanding of pollution incidents are discussed.

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