Abstract
Tapak area is an estuary of Tapak river where there are many mangrove and oysters (Crassostrea sp.) found. The development of industrial estate there has been affect Tapak waters, due to waste contamination containing heavy metals. This in turn will affect the occurrence of heavy metal accumulation in oysters, a cheap fisheries protein source. This research is purposed to identified Cadmium (Cd) content in oysters and water of Tapak coastal waters, Semarang. Sampling was taken throught justified random sampling. Laboratory analysis of Cd performed by using Atomic Absorbtion Spectrofotometer (AAS). Data analysis were undertaken using descriptive analysis, numerical indices and statistical analysis. Result showed that Cadmium (Cd) content in oyster in tapak areas were ranged between 0,242 - 0,402 mg/kg, with average 0,340 mg/kg. This value is still below water quality standart regulated by ISO 7287 by 2009 in amount of 1,0 mg/kg. It is concluded that Cadmium (Cd) within the oyster is still low stage, yet there should be carefully consumed, because Cadmium (Cd) was toxic and bioaccumulative heavy metal.
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