Bioaccumulation of some Heavy Metals (Cadmium, Copper and Zinc) in Three Tissues of the Common Carp Cyprinus carpio L. Collected from a Mud Culture

Abstract

The current study was conducted to find out the bioaccumulation of the three elements cadmium, copper and zinc, in tissues of the common carp Cyprinus carpio L., they were gills, muscles and viscera. Cultivated in three mud ponds in Thi Qar Governorate - Nasiriyah city, Shatrah district, in the village of Al-Ajjah Al-Buhan, near Al-Ghamouqa Valley, it is 55 km away from the center of Al-Nasiriyah. The fish were distributed to the lakes with uniform densities for the period from 5/11/2022 to 5/4/2023, by 1000 fish/m3 were used, it was divided into three lakes equally, with an average weight of 20 gm. A standard local diet was used to feed the fish, standard methods were used to estimate the concentrations of heavy metals in tissues, by a flame atomic absorption spectrometer. Results were recorded in tissues for cadmium in gills, muscles and viscera. The highest values were in the autumn season for gills and muscles, respectively (12.13-12.77 μg/gm dry weight). The highest concentration recorded in spring for tissues was (8.3 μg/gm dry weight). Copper recorded the highest value in gills, muscles and viscera, in the spring season (222.14, 334.77 and 110.65μg/gm dry weight), respectively. Zinc recorded high concentrations in the gills, viscera, and muscles, i In autumn (350.34, 259.17 and 303.34 μg/g dry weight), respectively. The results showed that the accumulation of elements; Heavy was in the following order: Zinc > copper > cadmium. Cadmium: gills > viscera > muscles. Copper: gills > muscles > viscera. Zinc: gills > viscera > muscles.