Stiftung Tierärztliche Hochschule Hannover (TiHo)

Occurrence of legacy and emerging organic pollutants in whitemouth croakers from Southeastern Brazil

Affiliation
Radioisotope Laboratory, Biophysics Institute, Federal University of Rio de Janeiro (UFRJ), Brazil. Electronic address: pizzochero@biof.ufrj.br.
Pizzochero, Ana Carolina;
ORCID
0000-0003-0360-7812
Affiliation
Persistent Organic Pollutants Group, Environmental Department, CIEMAT, Madrid, Spain.
de la Torre, Adrián;
Affiliation
Persistent Organic Pollutants Group, Environmental Department, CIEMAT, Madrid, Spain.
Sanz, Paloma;
ORCID
0000-0002-2942-964X
Affiliation
Persistent Organic Pollutants Group, Environmental Department, CIEMAT, Madrid, Spain.
Navarro, Irene;
ORCID
0000-0003-0988-7050
Affiliation
Freshwater and Oceanic Sciences Unit of reSearch (FOCUS), Laboratory of Oceanology, University of Liege, Belgium.
Michel, Loïc N.;
Affiliation
Freshwater and Oceanic Sciences Unit of reSearch (FOCUS), Laboratory of Oceanology, University of Liege, Belgium.
Lepoint, Gilles;
ORCID
0000-0003-2689-3348
Affiliation
Freshwater and Oceanic Sciences Unit of reSearch (FOCUS), Laboratory of Oceanology, University of Liege, Belgium.
Das, Krishna;
ORCID
0000-0002-0794-9927
Affiliation
Institute for Terrestrial and Aquatic Wildlife Research (ITAW), University of Veterinary Medicine, Hannover, Germany.
Schnitzler, Joseph;
Affiliation
British Geological Survey (BGS), Kingsley Dunham Centre, Keyworth, Nottingham, United Kingdom.
Chenery, Simon R.;
Affiliation
School of Ocean Sciences, Bangor University (BU), Wales, United Kingdom.
McCarthy, Ian D.;
Affiliation
Radioisotope Laboratory, Biophysics Institute, Federal University of Rio de Janeiro (UFRJ), Brazil.
Malm, Olaf;
ORCID
0000-0003-0296-739X
Affiliation
Radioisotope Laboratory, Biophysics Institute, Federal University of Rio de Janeiro (UFRJ), Brazil.
Dorneles, Paulo R.;
Affiliation
Persistent Organic Pollutants Group, Environmental Department, CIEMAT, Madrid, Spain.
Martínez, María Ángeles

The whitemouth croaker (Micropogonias furnieri) is one of the most commercially important species along the Atlantic coast of South America. Moreover, some of its biological traits (long life span, inshore feeding, high trophic position) make this species a suitable sentinel of coastal pollution. Here, we investigated contamination by multiple legacy and emerging organic pollutants, such as brominated and chlorinated flame retardants, polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), in whitemouth croakers from two estuaries (Guanabara and Sepetiba Bays) located in industrialized and urbanized areas in Rio de Janeiro State, Southeastern Brazil. Furthermore, we assessed how biological and ecological features could explain the observed contamination patterns. Regarding brominated flame retardants, concentrations of polybrominated diphenyl ethers (PBDEs) varied from 7.6 to 879.7 pg g-1 wet weight (w.w.), with high contribution of tetra-, penta-, hexa- and deca-BDEs. The sum of chlorinated flame retardants (dechlorane-related compounds, ΣDRC) ranged from <LOD to 41.1 pg g-1 w.w., mostly represented by Dechlorane 603 and Dechlorane Plus (DP). Concentrations of PCDDs and PCDFs varied from <LOD to 1.7 pg g-1 w.w., while the Toxic Equivalent (TEQ-PCDD/Fs) levels ranged from 0.1 to 0.2 pg g-1 w.w. Positive correlations between δ15N and concentrations of tri-, tetra- and penta-BDEs, as well as ΣDRC, DP and anti-DP isomers suggested that ecological factors (namely biomagnification along the food web) influence contamination of whitemouth croakers in the estuaries studied. Moreover, the sum of PBDEs (ΣPBDE), tri- and tetra-BDEs concentrations were negatively correlated with fish size, suggesting that depuration by fishes and/or habitat shift throughout the whitemouth croaker's life cycle might also influence concentrations. Overall, our study emphasized the need for further investigations to help understand the complex patterns of bioaccumulation and biomagnification that seem to exist in Southeastern Brazil.

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