Differential bioaccumulation of non-ortho-substituted and other PCB congeners in Coastal Arctic invertebrates and fish

Article Abstract:

Sediment, water, invertebrates and fish from Cambridge Bay, Northwest Territories, Canada, analyzed for 47 individual or co-eluting ortho-substituted polychlorinated biphenyl (PCB) congeners using chromatography and spectrometry techniques revealed variations in the composition of co-eluting congeners. Four-horn sculoin livers exhibited relatively constant percent composition of total PCB regardless of total PCB concentration. This suggests that exposure of samples to high PCB concentration does not increase the concentrations of non-ortho substituted congeners.

Fishes, Invertebrates

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Field estimates of net trophic transfer of PCBs from prey fishes to Lake Michigan salmonids

Article Abstract:

Great Lakes salmonids accumulate polychlorinated biphenyls (PCBs) by dietary extraction from ingested food. On the basis of the principle of the food web, humans and animals face high risks of contamination with PCBs. Thus, models predicting PCBs for food webs have been developed to reduce these risks. The models employ PCB transfer efficiency which is calculated from measurements of prey and predator PCB concentrations. Graphical representations of this relationship are included.

Physiological aspects, Salmonidae, Salmoniformes

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Weathering and dispersal of polychlorinated biphenyls from a known source in the Canadian Arctic

Article Abstract:

Polychlorinated biphenyls (PCBs) are transported from their source to other environments largely through accidental spills and emissions from disposal sites. In a study of a known PCB source in the Canadian Arctic, live and detrital vegetation and hydrocarbon-based carriers were identified as the major transporters of PCBs in the soil. The type of soil and non-homogenous PCB application also determined the dispersal of PCBs.

Soil pollution, Pollutants

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