عنوان مقاله [English]
This study was carried out from September 2006 to August 2007 in order to estimate heavy metals accumulation Cadmium, Copper and Iron in the muscle, gills and liver tissues of Johnius belangerii collected from Deylam in Bushehr Province. Sampling was performed seasonally and the study aimed to compare heavy metal concentrations in the fish with the safe limit standards. Fish samples were collected randomly from the catch of trawl fishing. After biometry of fish, they were divided into three length groups A, B and C; and tissue samples were taken form each length group and analyzed for heavy metals content using atomic absorption spectrophotometer. Heavy metal concentrations were significantly different in fish tissues, stations, and seasons. The highest concentration of cadmium, copper, and iron were recorded in the liver tissue and the lowest concentration was observed in the muscle tissue. The concentration of heavy metals showed a marked decrease from autumn to winter, and then increased from winter to summer. This trend was observed for all of the metals and could be related to the seasonal variations such as temperature and salinity changes. Cadmium concentration measured in fish samples was found to be above the safe limit proposed by MAFF, NHMRC, and WHO while the concentrations of copper and iron were below the standard safe limits.