Abstract
Mercury chloride can cause immunotoxic effects on fish. The accumulation or aggregate of melano-macrophages centers (MMCs) in the kidney is a feature of cellular immune response, so it can be used as a bioindicator of heavy metal toxicity in waters. This research aims to determine an effect of heavy metal exposure concentration of mercury chloride (HgCl2) on a number of MMCs from common carp kidney. This research using four treatments of mercury chloride: 0 ppm, 0.01 ppm, 0.05 ppm and 0.1 ppm. The main parameters were the number of MMCs in kidney common carp. Supporting parameter was behavior change, water quality and concentration of mercury in the water and kidney. The results of the research showed that the concentration the heavy metal exposure concentration of mercury chloride (HgCl2) affected the number of MMCs from common carp (Cyprinus carpio) kidney. The number of MMCs in the kidney of common carp exposed to mercury chloride 0.01 ppm, 0.05 ppm and 0.1 ppm increased compared to carp was not exposed to mercury chloride (0 ppm).
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