Abstract
Phenol is a common pollutant of aquatic ecosystems, into which it can be introduced by industrial waste water of different kinds (from refineries, chemical plants and paper mills), communal sewage, or decaying vegetation. In fish a very broad spectrum of toxic effects of phenol has been reported, ranging from disturbances in behavior to impairment of growth and reproduction or even serious organic damage. It has also been observed that previous exposure to phenol confers a certain degree of resistance. In the investigation reported here, the histopathological effects of phenol intoxication on bullhead (Cottus gobio) were studied, and the reactions of variously [open quotes]pre-exposed[close quotes] populations compared. 17 refs., 6 figs., 1 tab.
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