Histomorphological changes in some organs of the brown bullhead, <i>Ictalurus nebulosus</i> LeSueur, following short‐ and long‐term exposure to copper

Abstract

The effects of copper in solution on Icfalurus nebulosus was studied by means of acute short‐term bioassay and long‐term bioassay. Histomorphological and histochemical tests were performed on skin. liver, gills, gut and kidney; enzymatic tests were also performed on the liver. Morphological changes of skin. liver and gills are described. The results of the histoenzymatic tests on the liver agree with the histological findings and confirm a mild onset and slow evolution of liver distress.