Keywords: bioaccumulation, waterfowl, confined disposal facilities, PCBs, polychlorinated biphenyls, heavy metals, small mammals, wildlife, contaminants, Canada, duck livers, ducks, voles, shrews, poultry consumption guidelines, environmental pollution
Contaminants in wildlife utilising confined disposal facilities
Voles, shrews and aquatic plants from the Thunder Bay Confined Disposal Facility (CDF) and hatchery-reared ducks, released and recaptured four and 10 weeks after release, were analysed for heavy metals and polychlorinated biphenyls (PCBs). Metal concentrations in duck livers were comparable to our control site values and other reported studies. Metal concentrations in voles and shrews were similar to our control site values or other reported studies. Bioaccumulation of priority PCB congeners was observed in waterfowl muscle samples. Extrapolating our data to other Canadian CDFs in the Great Lakes, waterfowl at the Hamilton Harbour CDF would accumulate PCBs to concentrations greater than the USFDA poultry consumption guideline. Shrews bioaccumulated PCBs to concentrations 10 times higher than voles presumably due the dietary differences between the two species. PCBs concentrations in voles from the Thunder Bay CDF were approximately twice the control site concentrations.