High human exposure to lead through consumption of birds hunted with lead shot |
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Authors: | Johansen P Asmund G Riget F |
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Institution: | National Environmental Research Institute, Department of Arctic Environment, Frederiksborgvej 399, DK-4000, Roskilde, Denmark. poj@dmu.dk |
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Abstract: | We assess lead contamination of Greenland seabirds killed with lead shot having studied thick-billed murre and common eider, the two most important species in the diet. The lead concentration is very high in meat of eiders killed with lead shot (mean 6.1 microg/g-wet wt, 95% CL 2.1-12). This level is about 44 times higher than in drowned eiders and eight times higher than in shot murres. Analyzing whole breasts instead of sub-samples reveals about seven times higher lead levels in birds' meat. We conclude that in some cases the lead intake by Greenland bird eaters will largely exceed the FAO/WHO tolerable lead intake guideline and that lead shot is a more important source of lead in the diet than previously estimated. |
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