Regulation and Accumulation of Copper, Zinc and Cadmium by the Shrimp Palaemon elegans

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Abstract
The ability of P. elegans Rathke, 1937 to regulate internal concentrations of Cu, Zn and Cd was investigated over a wide range of external metal concentrations. Total body concentrations of Cu and Zn are regulated on exposure to dissolved metal concentrations up to 100 .mu.g l-1 metal. Exposure to higher levels of dissolved Cu and Zn produces an increase in the metal concentration of the shrimps. Body concentrations of Cu may increase by a factor of at least 5 times but only twice the normal body concentration of Zn could be tolerated by the shrimps. Cd concentrations are not regulated, the body concentration of metal being proportional to the external metal concentration.
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