Biomagnification of naturally-produced methoxylated polybrominated diphenyl ethers (MeO-PBDEs) in harbour seals and harbour porpoises from the Southern North Sea
Weijs, Liesbeth; Losada, Sara; Das, Krishnaet al.
2009 • In Environment International, 35, p. 893-899
[en] Harbour seals and harbour porpoises are top predator species from the North Sea, have long life spans and hence, are known to accumulate high levels of anthropogenic contaminants. To gain knowledge about the behaviour of naturally-produced compounds in these marine mammals, the biomagnification of naturally-produced methoxylated polybrominated diphenyl ethers (MeO-PBDEs) was assessed. The biomagnification of MeO-PBDEs (2'-MeO-BDE 68 and 6-MeO-BDE 47) was lower in harbour seals (all biomagnification factors (BMFs) < 1) compared to the same age-gender groups of the harbour porpoises (all BMFs > 1). This may indicate a better metabolic breakdown of MeO-PBDEs in harbour seals, as was previously suggested for polybrominated diphenyl ethers (PBDEs). In both predators, 6-MeO-BDE 47 had the highest concentrations (range: 45-483 ng/g lw and 2-38 ng/g lw for harbour porpoises and seals, respectively) compared to 2'-MeO-BDE 68 (range: 2-28 ng/g lw and 1-6 ng/g lw for harbour porpoises and seals, respectively). In general, the highest concentrations were found in juveniles, suggesting an increased biotransformation capacity with age or the influence of dilution by growth for both species. Here we show that naturally-produced brominated organic compounds can biomagnify and accumulate in North Sea top predators, although to a lesser extent than anthropogenic lipophilic contaminants, such as polychlorinated biphenyls (PCBs) or PBDEs.
Weijs, Liesbeth; Universiteit Antwerpen - UA > Toxicological Centre
Losada, Sara; Universiteit Antwerpen - UA > Toxicological Centre
Das, Krishna ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Roosens, Laurence; Universiteit Antwerpen - UA > Toxicological Centre
Reijnders, Peter J H; IMARES—Institute for Marine Resources and Ecosystem Studies > Department of Ecology
Santos, Javier F; University of Barcelona > Analytical Chemistry Department
Neels, Hugo; Universiteit Antwerpen - UA > Toxicological Centre
Blust, Ronny; Universiteit Antwerpen - UA > Department of Biology > Laboratory for Ecophysiology, Biochemistry and Toxicology
Covaci, Adrian; Universiteit Antwerpen - UA > Toxicological Centre
Language :
English
Title :
Biomagnification of naturally-produced methoxylated polybrominated diphenyl ethers (MeO-PBDEs) in harbour seals and harbour porpoises from the Southern North Sea
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] FWO - Fonds Wetenschappelijk Onderzoek Vlaanderen [BE] IWT - Agentschap voor Innovatie door Wetenschap en Technologie [BE]
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