Comparison of trace element and heavy metal levels of some trout species grown on farms with red spotted trout in Catak River

The increase in human population along with economic and technological developments has led to significant degrees of deterioration in water quality globally. As a result, it is important to determine the toxic metal concentrations in organisms living in water, especially in commonly consumed fish species. With this aim, due to the shallow water in our region we chose the important trout production location of Çatak River for sampling in our study, with natural Salmo trutta macrostigma and Oncorhynchus mykiss from the river and Salmo trutta macrostigma and Oncorhynchus mykiss bred in a trout production facility in Çatak district used. These fish had element levels (Be, B, Al, Ti, Cr, Mn, Co, Ni, Cu, Zn, Mo, Cd, Ba, Pb, Na, Mg, Si, K, Ca, Fe, As, Se and Sb) measured in heart, muscle, liver, kidney, gills, gonads, brain and intestinal tissue using an ICP-OES device. The results of the study are grouped as toxic elements (Be, Cd, Pb, Al, Ba and Ti), trace elements (Fe, Zn, Cu, Mn, Co, Ni, Cr, B, Si and Mo) and macro elements (Ca, Mg, K and Na) for assessment. According to the results of this assessment, for both fish species those raised in a natural environment were generally observed to have higher element levels compared to fish bred in farms. Keywords: Macro elements, Oncorhynchus mykiss, Salmo trutta macrostigma Toxic elements, Trace elements