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The effects of metals on mollusc filtering rates

Author(s): Watling H

Abstract

The filtering rates of Crassostrea gigas, Crassostrea margaritacea, Perna perna and Choromytilus meridionalis have been determined by measuring the removal of neutral red particles from a known concentration of neutral red suspension in a given time. The effects of copper, zinc, cadmium and lead on these filtering rates have been investigated and of these metals, copper was found to be the most toxic to both oysters and mussels. The effective concentrations are compared with the results of conventional lethal toxicity tests.

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