The use of unwanted aquatic organisms and discarded material of the fish industry to produce chicken feed, results in excretory products that contain excessive amounts of pollutants, especially Hg. It was observed that the Hg content in manure of broiler chicken was different in all five farms, the higher concentrations were observed in farm 1 and 3, while lowest amount of Hg was found in manure of Farm-5, as shown in Table 2. The concentrations of Hg in manure samples were correlated with the Hg contents in feeds (r = 0.976).