polybrominated diphenyl ethers (pbdes) in seal populations from eastern and western canada: an assessment of the processes and factors controlling pbde distribution in seals.polybrominated diphenyl ether (pbde) concentrations were measured in the blubber of five mother-pup pairs of grey seals (halichoerus grypus) from sable island, nova scotia (ns) sampled in 1995 and in 20 harbour seals (phoca vitulina) from british columbia (bc) sampled in 1991-1992. concentrations in maternal grey seals from sable island averaged 112+/-55.2 ng/g lipid (mean+/-s.d.) and were over twice the concentrations measured in their pups; higher brominated pbdes showed a distinct decline in ...200818359511
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