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Feasibility of removal of dioxin and dioxin-like PCB's by intensive fishery of herring and sprat in the Baltic Sea

image of Feasibility of removal of dioxin and dioxin-like PCB's by intensive fishery of herring and sprat in the Baltic Sea

In this report it is discussed and assessed whether it is feasible to reduce dioxin content of herring and sprat in the Baltic Sea by a period of intensified fishery in the region and if intensified fishery causes adverse environmental effects or affects the stocks of other species like cod, salmon and other pelagic species. The background is the present problems complying with the European Commission limit values for dioxins and dioxin-like PCBs in Fish from the Baltic Sea. Also flame retardants and other hazardous substances present an increasing quality problem for the fisheries sector.

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Dioxin and dioxin like PCBs in the Baltic Sea

’Dioxins’ are cyclic halogenated organic chemical compounds most commonly containing two benzene rings united by molecules in a third ring. Originally dioxins referred to a family of organic compounds, the polychlorinated dibenzo-para-dioxins (PCDDs). It has recently broadened its scope and also now encompasses the structurally related family of polychlorinated dibenzofurans (PCDFs). The PCDD group contains 75 different members and the PCDF group contains 135 members in total 210 different dioxins or congeners of which the most important are the 2,3,7,8 substituted ones (Assmuth, 2005; Environmental Agency, 2003).

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