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Mercury (Hg) which is contained in aquatic ecosystem can enter and be accumulatedÂ to organismâ€™s body, like on petek fish (Leiognathus equulus). The research aimed toÂ see mercury concentration in aquatic ecosystem, to see mercury concentration in organÂ of petek fish by AAS (Atomic Absorption Spectrophotometer) and its histopathology response in organs of petek fish. The research was done at Ancol, Jakarta Bay onÂ October-December 2004. There are 16 samples of water and fish from 3 stations.The analysis result of water quality is compared by standard quality of sea water forÂ sea organism life (Kepmen LH No. 51, 2004), mercu ry concentration in fish organ isÂ compared by maximum mercury concentration in fish body by classification of PalarÂ (2004). Ancol water quality is still on normal condition. Mercury concentration in waterÂ and petek fish organs had low concentration. Gill and lever contaminated by mercury
is only in station 1 fish, but it is still on normal concentration. Histopathology of petekÂ fish gill is not abnormal, while the lever is necrosis. Water and petek fish is not a goodÂ indicator to detect mercury in aquatic ecosystem.
Keywords: mercury, petek fish, water, lever, gill, histopathology, accumulation,
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