Abstract
1. The levels of mercury cadmium and zinc were measured in tissues of puffin ( Fratercula arctica) fulmar ( Fulmarus glacialis) and Manx shearwater ( Puffinus puffinus). 2. The highest levels of zinc and cadmium (up to 480mg/kg Cd, dry wt) were found in kidney, liver, pancreas, gonad, and intestine. 3. Substantial quantities of mercury-mostly methyl mercury-were found in the liver of the fulmar nd Manx shearwater (up to 45.0 mg/kg Hg, dry wt). 4. Puffin feathers contained more mercury (7.94 mg/kg Hg, dry wt) than the liver and kidney. 5. The possibility that, since these birds were breeding they were not suffering any adverse effects of the metals, is discussed.
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