Electron Microscopic Study of the Gills of Puntius gonioMtur (Bleeker) Exposed to Coppe

Abstract

Electron microscopic observations on the gill lamellae of Pla Tapien Khao - Puntius go~rionotus( Bleeker) exposed to different concentrations of copper solution for 48 hr were as follows : particles which were presumably copper origin were attached to the outer surface of the epithelium; these particles were also found in the intercellular spaces; inclusions were found in the cytoplasms of both epithelial cells and chloride cells; a dead cell was noted in one occasion; and at high concentration of copper, intercellular spaces were hardly seen. These evidences showed the difficulties of gas exchange. Thus, it might be concluded that the death of the fish tested was the result of oxygen deficiency.