Some Heavy metals measurements (Cadmium, Copper, and Zinc) in the tissues of common carp Cyprinus carpioL . 1758 farmed in floating cages in the Euphrates River.

Abstract

The current study examined the concentrations of three heavy metals (cadmium, copper, and zinc) in the tissues of common carp fish. (gills-musclesintestines) collected from one of the private farms that raised fish in floating cages in the Euphrates River from 18/10/2021 to 18/3/2022. Every month, water samples were analyzed, as were fish tissue samples. Using an atomic absorption spectroscopy device, standard procedures were followed to assess the concentration of heavy metals in water and tissues. The results showed that the highest concentration of zinc, cadmium, and copper was detected in the water during the winter season, reaching (125.5-31.95-1.37) MKgm/L. The highest concentrations of cadmium in tissues were found in the autumn season for gills and muscles (1.58-0.81) mkgm/L dry weight, and the highest concentration in tissues (0.80) mkgm/L dry weight in the winter. The highest concentrations of copper were found in the gills and muscles, followed by the intestines. Where concentrations are at their highest in the autumn season (11-9.89, 12.31) mkgm/gm dry weight. As for zinc was found in high concentrations in the gills, intestines, and muscles, with the highest concentrations recorded in the autumn season (81.6-85-93 – 112) mkgm/gm dry weight. The results revealed that heavy metal accumulation occurred in the following pattern: Concentrations in water: cadmium <copper<zinc, while in tissues, the arrangement was as follows: Cadmium – gills – muscles – intestines – copper. Gills – muscles – intestines Zinc – gills – intestines – muscles. Keywords: Heavy metals, Cadmium, Copper, Zinc, common carp, Cyprinus carpio L.