Light Microscopic Studies on the Effects of Zine Treated Water Media on the Kidney of Oreochromisniloticus fingerlings

Abstract

Light microscope studies of the effects of sublethal concentrations of zinc as ZnS04.7H20 on the tail kidney of Oreochromis niloticus fingerlings were done. Hyperemia and damage to interstitial tissues were consistently observed in hoth sampling periods of both concentration groups. Dense bodies and vacuolations were prevalent in the early stage of the experiment. In addition, tubular necrosis, dilation of the tubules and the Bowman's capsule, compact glomeruli, thinning of the tubular epithelia and hyperplastic Bowman's capsule were also observed in varying degrees and incidences.