Mercury concentrations in plaice, flounder and dab from Belgian continental shelf waters (1971-1990)
Guns, M.; Vyncke, W.; De Clerck, R. (1992). Mercury concentrations in plaice, flounder and dab from Belgian continental shelf waters (1971-1990). Landbouwtijdschrift 45(5): 959-964
In: Landbouwtijdschrift = Revue de l'Agriculture. Ministerie van Landbouw: Brussel. ISSN 0776-2143, meer
Results obtained during a survey of 20 years on plaice (Pleuronectes platessa) and 15 years on flounder (Platichthys flesus) and dab (Limanda limanda) are reported. With flounder, two periods could be distinguished. In 1975-1981, higher mercury concentrations (0.38 mg/kg on average) with rather large variations were noted. From 1982 on, concentrations fluctuated around the same mean value (0.23 mg/kg). A gradual decrease of mercury levels in plaice was observed during the twenty years' monitoring period. The mean concentration in 1990 (0.06 mg/kg) was only one third of that of 1971 (0.18 mg/kg). In contrast with flounder and plaice, mercury concentrations in dab remained practically at the same level (0.09-0.13 mg/kg).
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