Abstract
The amount of copper taken up via algae and water byMacoma balthica from the Oosterschelde sea arm, S.W. Netherlands, was established using the radioisotope64Cu. As far as we know, this isotope has never been used before in marine flod chain studies. As a model food source the marine diatomPhaeodactylum tricornutum was allowed to accumulate64Cu for 1 d. These labelled algae were fed to the clams in the presence of the complexing agent EDTA (0.27mM). EDTA was added to prevent uptake of dissolved64Cu that could be leaking from the labelled diatoms. In control experiments, unlabelled diatoms were fed toM. balthica in the presence of dissolved64Cu (with and without EDTA) in order to assure a similar filtration activity. In repeated experiments with varying particulate/dissolved copper ratios, uptake through food always turned out to be at least as efficient as uptake from the water. It was concluded that Cu, associated with food, is well available for uptake byM. balthica.
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Communication number 645 of the Centre for Estuarine and Coastal Ecology, Yerseke, The Netherlands
Communicated by O. Kinne, Oldendorf/Luhe
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Absil, M.C.P., Kroon, J.J. & Wolterbeek, H.T. Availability of copper from phytoplankton and water for the bivalveMacoma balthica. II. Uptake and elimination from64Cu-labelled diatoms and water. Mar. Biol. 118, 129–135 (1994). https://doi.org/10.1007/BF00699227
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DOI: https://doi.org/10.1007/BF00699227