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Inter-species differences for polychlorinated biphenyls and polybrominated diphenyl ethers in marine top predators from the Southern North Sea: Part 1. Accumulation patterns in harbour seals and harbour porpoises
Weijs, L.; Dirtu, A.C.; Das, K.; Gheorghe, A.; Reijnders, P.J.H.; Neels, H.; Blust, R.; Covaci, A. (2009). Inter-species differences for polychlorinated biphenyls and polybrominated diphenyl ethers in marine top predators from the Southern North Sea: Part 1. Accumulation patterns in harbour seals and harbour porpoises. Environ. Pollut. 157(2): 437-444. dx.doi.org/10.1016/j.envpol.2008.09.024
In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491; e-ISSN 1873-6424, meer
Peer reviewed article  

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Trefwoorden
    Accumulation
    Aquatic organisms > Marine organisms > Aquatic mammals > Marine mammals
    Chemical compounds > Organic compounds > Hydrocarbons > Unsaturated hydrocarbons > Aromatic hydrocarbons > PCB
    Profiles
    ANE, Noordzee [Marine Regions]
    Marien/Kust
Author keywords
    PCBs; PBDEs; Profiles; Accumulation; Harbour seal; Harbour porpoise;Marine mammals; Southern North Sea

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Abstract
    Harbour porpoises (Phocoena phocoena) and harbour seals (Phoca vitulina) are two representative top predator species of the North Sea ecosystem. The median values of sum of 21 polychlorinated biphenyl (PCB) congeners and sum of 10 polybrominated diphenyl ether (PBDE) congeners were 23.1 Î1/4g/g lipid weight (lw) and 0.33 µg/g lw in blubber of harbour seals (n = 28) and 12.4 µg/g lw and 0.76 µg/g lw in blubber of harbour porpoises (n = 35), respectively. For both species, the highest PCB concentrations were observed in adult males indicating bioaccumulation. On the contrary, the highest PBDE concentrations were measured in juveniles, likely due to better-developed metabolic capacities with age in adults. A higher contribution of lower chlorinated and non-persistent congeners, such as CB 52, CB 95, CB 101, and CB 149, together with higher contributions of other PBDE congeners than BDE 47, indicated that harbour porpoises are unable to metabolize these compounds. Harbour seals showed a higher ability to metabolize PCBs and PBDEs.

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