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(77-16) Differences of chloroorganic pesticides and polychlorinated biphenyls bioaccumulation in selected organisms from the Gulf of Gdansk. Sapota, Grazyna*,1, 1 Institute of Meteorology and Water Management, Maritime Branch, Waszyngtona 42, Gdynia, Poland ABSTRACT- Bioaccumulation is the general term describing process by which chemicals are taken up by aquatic organisms from water directly and through consumption of food containing the chemicals. Various toxic substances, for example chloroorganic pesticides (DDT and its metabolites, hexachlorocyclohexanes, hexachlorobenzene) and polychlorinated biphenyls(209 congeners) accumulate in aquatic organisms. We can observe clear differences in bioaccumulation pattern of these toxic substances in selected organisms from the Gulf of Gdansk. Increase in concentrations of DDT and its metabolites, especially DDE is noticed in plankton and the muscle of pelagic fish (Clupea harengus, Salmo trutta) and fish-eating birds (Phalacrocorax carbo, Larus ridibundus). PCBs predominate in the body of benthic organisms (Mytilus trossulus, Mya arenaria, Cerastoderma glaucum, Crangon crangon, Halicryptus spinulossus) and in the muscle of bottom feeding fish (Myoxocephalus scorpius, Zoarces viviparus). Probably governing factors, which have an influence on presented situation, are transport of chlorinated hydrocarbons into marine environment,differences in solubility of DDT and PCBs in water and way of life of organisms: plankton,pelagic fish, birds - active and macrozoobenthos, bottom feeding fish - stable. Key words: chloroorganic pesticides, polychlorinated biphenyls, organisms, Baltic Sea |
