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Fresh report on copper from aquaculture facilities

Click on the flag for more information about Norway NORWAY
Monday, January 30, 2023, 04:10 (GMT + 9)

The Directorate of Fisheries is concerned about the effect copper used in the aquaculture industry has on the environment. The new report concludes, among other things, that the emissions from aquaculture facilities are of such a magnitude that the researchers at the Institute of Marine Research expect negative effects on organisms around the facilities.

A report was therefore ordered from the Institute of Marine Research, which has now been received and published.

The report concludes, among other things, that the emissions from aquaculture facilities are of such a magnitude that the researchers at the Institute of Marine Research expect negative effects on organisms around the facilities.

Changes observed by histology in gills of mussels growing in a copper impregnated mesh. A) Normal gills. B) Magnification of the subepithelial void in a mussel taken from a groove exposed to copper with hemocytes. Source: Marine Research Institute

Maps localities with high copper concentrations

The Directorate of Fisheries has worked in parallel to obtain a complete overview of localities with high concentrations of copper in the sediment, as well as to obtain an overview of localities where measurements of copper in the sediment are missing.

Copper level in sediments from three stations in Radfjorden and in Sørfjorden on Osterøy in the period 2018-2022. The blue line at 20 mg/kg marks the limit for condition class 1 (background) and condition class II (good). The green line at 84 mg/kg marks the boundary between Condition Class II (Good) and Condition Class III Moderate and IV (Poor). (*) indicates significant change, p< 0.05. Source: Marine Research Institute

These locations will be followed up further. In the first instance, this is done by issuing an order to measure copper (after prior notice) in locations where no such measurements have previously been carried out in the sediment.

Source: Fiskeridirektoratet. Traslated from the original in Norwegian.

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