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Publication Date: 1983
Seller: ConchBooks, Harxheim, Germany
Concentrations of organochlorines were determined in Macoma balthica, Arenicola marina, Crangon crangon and sediments from the Dutch Wadden Sea. Maximum concentrations of (total) PCB, ?-HCH and dieldrin were found in the western part; a pronounced maximum of HCB was found in the western part. Concentrations of PCB, p,p?-DDD and p,p?-DDE in sediment were correlated with the percentage of particles <50 ?m. The relative contribution of each individual component to total PCB is very similar in Macoma and Arenicola and is independent of the concentration of total PCB. The relative concentrations of some components with structures facilitating metabolism, were lower in Crangon. The patterns of pentachloro- and higher chlorinated biphenyls were equal in Macoma, Arenicola and sediments. Since these components are not found in solution, they must be taken up from sediment and food. The results are in agreement with partitioning between body lipids and water as the dominant mechanism determining concentrations of persistent lipophilic contaminants in the animals. Partitioning with the ambient water may also determine the concentrations in the sediment. 20 pp., 7 figs., gr. 8.