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Sample collection

SM Szczepan Mikolajczyk
MW Malgorzata Warenik-Bany
MP Marek Pajurek
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Altogether 63 fish samples were collected from three ICES Baltic fishing areas (24, 25, and 26) (Fig. 1) by the Veterinary Inspectorate (Table ​(Table11).

Map of the Baltic Sea showing the ICES areas (https://www.fao.org/fishery/en/area/27)

Analyzed fish species details

The Baltic Sea fish species that were chosen for investigation were salmon (Salmo salar), sea trout (Salmo trutta m. trutta), cod (Gadus morhua callarias), sprat (Sprattus sprattus balticus), and herring (Clupea harengus membrus). Bigger fish (salmon, trout, and cod) were tested individually and smaller fish were pooled. Salmon, trout, cod, and herring were tested through a slice of the fish muscles from backbone to belly in the middle part of the fish, while sprat were tested as whole fish. Sampling was performed in accordance with provisions of Regulation (EU) 2017/644.

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