The Survey of Cd Ion effects on Iron in Common Carp (Cyprinus carpio) whole blood

The present study was carried out in order to examine the impact Cadmium on amount of iron in the blood of common carp. Sampling of common carp was carried out randomly from a fish culture pond in southeast of Babol by trawling. Firstly the fish were become compatible with the laboratory conditions during 48 hours and then have been influenced by different concentrations through one blank and 3 experimental groups of A (4.296 mg/l), B (7.127 mg/l) and C (8.656 mg/l). There were 12 aquariums, each including 12 pieces of fish. It was tried to apply an equal environmental condition for all of the aquariums during the experiment. Bleeding was done from the fish vein and heart after 48, 72 and 96 hours of anesthetizing.. Concentrations of cadmium and iron have been determined by ICP-OES after acid digestion of blood samples by Microwave. In analyzing Cadmium, the fish average weight and length (total length) were 163.6 g, 23.6 respectively In this study it has been identified that the absorption scale of Cadmium increases as the time passes and generally it showed a significant increase (p<0.05, n=3) during the time in cadmium concentrations of blood comparing the blank sample. This has no significant trend since the blood acts as a carrier and is a junction for heavy metals such as cadmium to the target organs. Furthermore, in addition to refusal of this theory that: "concentration of lead and cadmium ions by interactions with common carp blood iron has a significant impact on iron amount in blood", there has not seen any significant relation (p<0.05, n=3) between increasing of the amount of absorbed Cadmium and blood iron changes. Therefore, it could be concluded that probably no interaction between cadmium, and blood iron happens in blood circulation and the blood iron changes during the test is probably because of some physiological changes resulting from stress in fish blood.