Abstract
The disposal of wastes to sea is regulated internationally by the Oslo and Paris Conventions, which were ratified by the United Kingdom in 1975 and 1978 respectively. Under these Conventions the direct disposal of certain substances, for example mercury and cadmium compounds, is prohibited, unless they are present in wastes as trace constituents. Of particular concern in the case of mercury is its possible incorporation in the aquatic food chain and transfer to man via marine foodstuffs. There are many examples of accumulation of mercury by fish in contaminated areas e.g. Liverpool Bay (Norton & Murray, 1983; Franklin, 1987); Haifa Bay (Hornung & Krumgalz, 1984); Minimata Bay (Fujiki, 1980) and in river systems such as the Ems (Essink, 1980,1988).
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