Date : 2017/01/20
الدكتور/ فتحي الهاشمي البشير
The bioaccumulation of cadmium, copper, lead and zinc was determined in muscle, liver and gill tissues of two commercially fish species, Arius thalassnius and Johnius belangrei collected in March, April from Kapar on the western coastal water, Peninsular Malaysia. The levels of Cu, Zn, Cd and Pb in the muscles of the examined fish were (1.33–3.39), (20.62–32.95), (0.03–0.08) and (0.15–0.44) µg/g dry weight, respectively. Moreover, the relationship between metal concentrations in these fish’s tissues, and lengths were also examined. Generally, Metal levels in muscles were lower than those in livers and gills. Zn concentration was found highest in all species. However, Pb concentrations in the muscle were higher than the maximum levels set by FAO/WHO but still below the Malaysian Food regulation standard. Positive relationships between the Cu, Zn and fish lengths were observed, whereas weak relations between Cd, Pb and body lengths were documented. However, the findings of the research indicated that heavy metals in the edible parts of the investigated fish are in the permissible safety levels for human consumptions.
Keywords — Bioaccumulation, safety level, marine fish, trace elements, ICP-MS.