In this study, concentrations of heavy metals were determined in the tissues of fish species ( S. solea and S. aurata ) and shrimp (P. semiculatus ) from the Yumurtalık zone of the Iskenderun Gulf, Turkey. The aim of of our study is to evaluate potential risks to human health associated with fish and shrimp consumption. Metals concentrations varied significantly depending on the tissues and species. The concentrations of Cu, Fe, Pb and Zn in fish and shrimp tissues were high, while Cd levels were relatively low. In comparing with the permissible limits set by the European Union and Food and Agricultural Organization for fish and shrimp, mean values of Cu, Fe, and Zn were within acceptable limits, but the mean values of Cd and Pb exceeded the limits. From the standpoint of human health, this study suggests that the observed Pb and Cd accumulation may pose a possible health risk to excessive S. solea and P. Semiculatus consumers in Turkey.

The concentrations of four metals (copper, cadmium, zinc and lead) were quantified in blue crabs (Callinectes sapidus) tissues collected in January, April, June and September at two stations in Mersin Bay, northeastern Mediterranean Sea, using ICP-MS. The metal concentrations in crabs from the two stations differed significantly. The hepatopancreas was the major organ accumulating metals, followed by gill and muscle tissues. Except for lead, the highest concentrations of metals were measured in the hepatopancreas. The hepatopancreas had higher concentrations of all heavy metals (Cu 321.1 ± 4.30; Zn 182.2 ± 3.40; Cd 48.2 ± 2.00) compared to gill (Cu 90.2 ± 1.35; Zn 104.3 ± 2.30; Cd 22.3 ± 3.40) and muscle (Cu 19.1 ± 1.10; Zn 55.1 ± 3.25; Cd 2.5 ± 0.20). Among the metals analyzed, Cu, Zn and Pb were the most abundant in the different tissues while Cd was the least abundant in C. sapidus. Seasonality in the levels of the four metals was determined.The highest concentrations of all metals were observed in the June (Zn 55.1 ± 3.25; Cu 19.1 ± 1.10; Cd 2.5 ± 0.20; Pb 5.1 ± 0.18) compared to all other months (Zn 34.1 ± 3.23; Cu 11.1 ± 1.15; Cd 0.9 ± 0.20; Pb 3.1 ± 0.21).

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Atatürk Baraj Gölü'nün evsel ve endüstriyel atık sularıyla kirlenen Sitilce ve göreceli olarak temiz bölge olan Samsat bölgelerinden dört farklı balık türü, 2013 yılının Ağustos ayında yakalanmıştır. Silurus triostegus, Chalcalburnus tarichi, Chondrostoma regium ve Carassius carassius türlerinin balıkların solungaç, karaciğer ve kas dokularındaki Cu, Zn, Fe, Cd, Pb ve Cr düzeyleri İndüktif olarak Birleştirilmiş Plazma Optik Emisyon Spektrometresi (ICP-OES) cihazıyla belirlenmiştir. Metal düzeylerinin çalışma bölgelerinden etkilendiği ve tüm örneklerin dokularındaki en yüksek metal düzeylerinin kirli bölgede daha yüksek olduğu saptanmıştır. Sitilce ve Samsat örneklerinin kas dokularındaki en yüksek metal düzeyleri µg/g kuru ağırlık olarak sırasıyla; 0,75 ve 0,18 (Cu); 22,58 ve 7,42 (Zn); 27,11 ve 7,22 (Fe); 0,09 ve Saptanamadı (SP) (Cd), 0,29 ve SP (Pb), 0,13 ve SP (Cr) olarak bulunmuştur. Atatürk Baraj Gölü'nün Sitilce bölgesindeki balıkların kas dokularında önemli düzeylerde ağır metallerin biriktiği ancak bu değerlerin yasal olarak izin verilen limitlerin altında olduğu belirlenmiştir.

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