(Table 1) Neutral and phenolic organohalogen compounds in blubber samples of ringed seals (Pusa hispida) from East Greenland

• Main Authors: Letcher, Robert J, Gebbink, Wouter A, Sonne, Christian, Born, Erik W, McKinney, Melissa A, Dietz, Rune
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: 3-methylsulfonyl p,p-dichlorodiphenyl dichloroethylene; 4-hydroxy-heptachlorostyrene; alpha-Hexabromocyclododecane; Biological sample; BIOS; Brominated biphenyl; standard deviation; Brominated biphenyl 101; Chlordane; DATE/TIME; Date/time end; Dichlorodiphenyldichloroethylene; East Greenland; Hexabromocyclododecane; Hydroxylated polybrominated biphenyl; Hydroxylated polybrominated diphenyl ethers; Hydroxy-polychlorinated biphenyl; International Polar Year (2007-2008); IPY; Ittoqqort_Scoreby; Lipids; Methoxylated polybrominated diphenyl ethers; Methyl sulfone polychlorinated biphenyl; para,para-Dichlorodiphenyldichloroethylene; Pentachlorophenol; Polybrominated diphenyl ethers; Polychlorinated biphenyl; Sample type; Species; Greenland; International Polar Year; Pusa hispida; ringed seal; Ursus maritimus
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.815795; https://doi.org/10.1594/PANGAEA.815795

We report on the comparative bioaccumulation, biotransformation and/or biomagnification from East Greenland ringed seal (Pusa hispida) blubber to polar bear (Ursus maritimus) tissues (adipose, liver and brain) of various classes and congeners of persistent chlorinated and brominated contaminants and metabolic by-products: polychlorinated biphenyls (PCBs), chlordanes (CHLs), hydroxyl (OH-) and methylsulfonyl (MeSO2-) PCBs, polybrominated biphenyls (PBBs), OH-PBBs, polybrominated diphenyl ether (PBDE) and hexabromocyclododecane (HBCD) flame retardants and OH- and methoxyl (MeO-) PBDEs, 2,2-dichloro-bis(4-chlorophenyl)ethene (p,p'-DDE), 3-MeSO2-p,p'-DDE, pentachlorophenol (PCP) and 4-OH-heptachlorostyrene (4-OH-HpCS). We detected all of the investigated contaminants in ringed seal blubber with high frequency, the main diet of East Greenland bears, with the exception of OH-PCBs and 4-OH-HpCS, which indicated that these phenolic contaminants were likely of metabolic origin and formed in the bears from accumulated PCBs and octachlorostyrene (OCS), respectively, rather than being bioaccumulated from a seal blubber diet. For all of the detectable sum of classes or individual organohalogens, in general, the ringed seal to polar bear mean BMFs for SumPCBs, p,p'-DDE, SumCHLs, SumMeSO2-PCBs, 3-MeSO2-p,p'-DDE, PCP, SumPBDEs, total-(alpha)-HBCD, SumOH-PBDEs, SumMeO-PBDEs and SumOH-PBBs indicated that these organohalogens bioaccumulate, and in some cases there was tissue-specific biomagnification, e.g., BMFs for bear adipose and liver ranged from 2 to 570. The blood-brain barrier appeared to be effective in minimizing brain accumulation as BMFs were <= 1 in the brain, with the exception of SumOH-PBBs (mean BMF = 93±54). Unlike OH-PCB metabolites, OH-PBDEs in the bear tissues appeared to be mainly accumulated from the seal blubber rather than being metabolic formed from PBDEs in the bears. In vitro PBDE depletion assays using polar bear hepatic microsomes, wherein the rate of oxidative metabolism of PBDE congeners was very ...