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Cadmium and polychlorinated biphenyls: different distribution pattern in North Sea benthic biota
Everaarts, J.M.; Otter, E.; Fischer, C.V. (1990). Cadmium and polychlorinated biphenyls: different distribution pattern in North Sea benthic biota. Neth. J. Sea Res. 26(1): 75-82
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
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  • Everaarts, J.M.
  • Otter, E.
  • Fischer, C.V.
Abstract
    Whole-body concentrations of cadmium in the shrimp Crangon allmanni and the starfish Asterias rubens were significantly higher in specimens collected from areas north and northeast of the Dogger Bank than in other areas of the North Sea studied. In the brown shrimp Crangon crangon, whose distribution is restricted to the estuarine and coastal zone, the cadmium concentration was found to be significantly lower than in C. allmanni and did not vary with sampling site. The cadmium concentrations in shrimp increased from the estuarine area (including the Dutch Wadden Sea) to the coastal zone and Southern Bight of the North Sea and again to the open central North Sea (Dogger Bank). Concentrations of the total of 50 polychlorina- ted biphenyl congeners were higher in Crangon crangon and Asterias rubens occurring in the coastal zone of the Southern Bight than in specimens of the central and northern part of the Dutch continental shelf. The biphenyl congeners concentration in the shrimp Crangon allmanni was considerably lower than in the closely related species C. crangon. Thus, cadmium and PCBs showed different distribution patterns in North Sea benthic invertebrates: highest concentrations of biphenyl congeners were restricted to estuarine and coastal areas and highest concentrations of cadmium were found in the open sea (central North Sea, north of the Dogger Bank).
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