Abstract
Zoarces viviparus was used as an indicator to monitor mercury pollution in Dutch coastal waters. No evidence was found for seasonal variation in muscle tissue mercury contents. In the western Dutch Wadden Sea mercury contents have decreased due to a reduced mercury discharge by the river Rhine. A similar decrease was found in the Ems estuary following a reduction of industrial waste discharges. In 1981 mercury contents in Zoarces viviparus in all coastal waters investigated were about equally low. However, comparison with mercury contents found in the Firth of Forth (Scotland) shows that contamination with mercury is still clearly present in Dutch coastal waters.
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