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The present study investigates the concentrations of cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn), chromium (Cr), aluminum (Al), and iron (Fe) in the carapace meat of female and male blue swimming crabs (Portunus segnis) from the northeastern Mediterranean Sea in the Gulf of Mersin, Turkey. The order of average heavy metal concentrations in carapace meat samples in both male and female species was Zn>Fe >Cu>Al>Mn>Cr>Pb. From the obtained results, the levels of some metals such as Cu, Zn, and Fe were higher than the acceptable values for human consumption designated by various health organizations. The comparison of our results with previous studies showed that blue swimming crab (Portunus segnis) have been contaminated with heavy metals. The occurrence of high levels of Cu, Zn, and Fe in the aquatic environment is thought to be a result of industrial and maritime traffic activities in Mersin Bay.
In the present study, the concentration of cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn), and iron (Fe) in the gill and muscle tissues of four benthic fish species (Merluccius merluccius, Lophius budegassa, Helicolenus dactylopterus, and Chlorophthalmus agassizi) from the northeastern Mediterranean Sea in Turkey were investigated. From the obtained results, the heavy metal concentrations in muscle were lowest and highest in the gills for each species. Cd was not detected in any tissues of the species. The order of heavy metal concentrations were found as Zn>Fe>Cu>Pb=Cd in muscle tissue samples for four selected fish species (p<0.05). In the muscle tissue, the highest concentration of Zn (5.875 μg/g) was found in Lophius budegassa. The concentrations of heavy metals in gills of four selected fish species were Fe>Zn>Cu>Pb>Cd (p<0.05). In the gills, the highest concentration of Fe (73.730 μg/g) was also found in Lophius budegassa. The comparison of our results with previous studies showed that the metal levels of tissues are variable in organisms caught from the same area. In our study, the concentrations of Cd, Pb, Cu, Zn, and Fe in the muscle tissue are less than the permissible limits set for heavy metals by food regulations.
This study was carried out to detect concentrations of heavy metals (Cd, Pb, Cu, Zn, Fe) in the muscle and liver of female and male specimens of commercially important giant red shrimp (Aristaeomorpha foliacea) obtained from the Mediterranean Sea. Samples of species were collected in summer and winter. The results show that the concentrations of heavy metals in liver for male and female shrimps were higher than those in muscle. Also, the average Cd, Pb, Cu, Zn, and Fe concentrations in both liver and muscle for male shrimp were slightly higher than the average levels of female shrimp. Significant differences were observed only for Cu in liver and for Fe in muscle (p<0.05). The comparison of our results with the International Standards showed that the concentrations of Cd, Pb, Cu, Zn, and Fe in the muscle tissue is less than the authorized range of WHO and FDA standards.
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