On the frequency of left-sides individuals in European flounder (Platichthys flesus) populations in relation to pollution monitoring
Vethaak, D.; Eggens, M.L.; Jol, J. (1990). On the frequency of left-sides individuals in European flounder (Platichthys flesus) populations in relation to pollution monitoring. CM Documents - ICES, CM 1990(E:20). International Council for the Exploration of the Sea: Copenhagen. 9 pp.
Part of: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744
The European flounder (Platichthys flesus) is commonly used by scientists of ICES countries in the monitoring of pollution of coastal and estuarine areas. Flounder is one of the few flatfish species, where both right-sided (normal) and left-sided (reversed) individuals can becommonly observed. This paper describes the frequencies observed in different local stocks and age groups in Dutch coastal waters. Further, indications were found of a higher selective mortality and morbidity, and a lower enzyme induction activity (EROD) in reversed fish. It is recommended that the feature of normal/reversed phenotype should be recorded in sampling programmes, because it might prove a potentially useful index for monitoring environmental deterioration.
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