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Blubber samples from harbour (Phoca vitulina) and grey seals (Halichoerus grypus) captured in the St Lawrence Estuary were analysed for PCBs and OC pesticides. Concentrations of PCB, DDT, CHLOR and mirex were higher in harbour than in grey seals, while HCH and HCB were similar in the two species. Age vs. concentration plots showed that PCB, DDT and CHLOR concentrations increased with...
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