عنوان مقاله [English]
The aim of this study was to investigate and compare the accumulation of copper, zinc and cadmium in sediment, muscle tissue and carapace of ghost crab (Ocypode saratan) in the two climatic periods pre- and post- Mansoon in Chabahar Bay and Gowater. In total 60 samples of crabs were collected, and the heavy metal concentrations in their muscle and shell were measured. The metal accumulation pattern was obtained in both tissues and in both periods as Zn> Cu> Cd. The highest concentrations of metals with 99.39±4.5 micrograms per gram of dry weight were related to zinc in pre- Mansoon and the lowest concentrations were related to cadmium with 0.0016± 0.007 micrograms per gram of dry weight in post Mansoon in muscle. In general, a comparison of metal concentrations between two seasons in muscle tissue, carapace, and sediment showed that the concentration in muscle and carapace tissue were significantly higher in post-Mansoon than pre-Mansoon (p < 0.05). Except for the copper in muscle tissue, the results showed that the concentration of copper in the post-Manson muscle was slightly higher than pre- Mansoon. The concentration of copper and zinc metals was higher in the post-Mansoon than in the pre- Mansoon (p < 0.05), but cadmium was reported to be slightly higher than in the pre Mansoon than post Mansoon. It was also found that the concentration of metals in the Gowater mangrove forests was higher than in Chabahar (p < 0.05). Comparison of metal concentrations in ghost crab muscle tissue with international standards showed that zinc concentration was higher than all standards except NHMRC and WHO. But cadmium was found to be below the all standard values. Copper and zinc were found to have excessive values, which is a concern for species health and therefore the food chain. The necessary steps should be taken to conduct the possible controlling actions. The concentrations of metals in the sediment were lower than the sediment quality standards of the United States and Canada. Therefore, the metals in the sediments of the studied areas may not be a big threat to the organisms.