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Research article - Peer-reviewed, 2022

A screening study of relationships among concentrations of algal toxins, PFAS, thiamine deficiency and biomarkers in the European flounder from the southern Baltic Sea

Dahlgren, Elin; Naslund, Joacim; Forlin, Lars; Balk, Lennart; Asplund, Lillemor; Lindqvist, Dennis


In the disturbed Baltic Sea ecosystem, several animal species display failing health related to exposure to toxic compounds, reduced energy metabolism and immune system disorders. In order to investigate possible associations between fish health and exposure to chemicals affecting the energy metabolism and immune defence, the levels of algal toxins (bromophenols, hydroxylated polybrominated diphenyl ethers and nodularin), perfluorinated alkyl substances (PFAS) and thiamine (vitamin B1) were determined in European flounder (Platichthys flesus). Several biomarkers indicating health status were examined in the fish, including ethoxyresorufin-O-deethylase (EROD), and activities of glutathione reductase, glutathione S-transferase and catalase, in addition to a large set of blood variables. The fish were collected from Hanobukten in the south-western parts of the Baltic Sea in late August 2018. Regression analyses of algal toxins, PFAS and thiamine concentration displayed several significant associations with biomarkers associated with detoxification and liver function, immune system function and blood status of the fish. (c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (


Biomarkers; Han?bukten; Fish health; Bromophenols; Hydroxylated polybrominated diphenyl ethers; Cyanotoxins; Perfluorinated alkyl substances; Vitamin B-1

Published in

Regional Studies in Marine Science
2022, volume: 53, article number: 102427
Publisher: ELSEVIER

Authors' information

Swedish University of Agricultural Sciences, Department of Aquatic Resources
Swedish University of Agricultural Sciences, Department of Aquatic Resources
Forlin, Lars
University of Gothenburg
Balk, Lennart
Stockholm University
Asplund, Lillemor
Stockholm University
Lindqvist, Dennis
Stockholm University

Sustainable Development Goals

SDG14 Life below water

UKÄ Subject classification

Fish and Aquacultural Science

Publication Identifiers


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