Abstract
1. The levels of zinc, cadmium and mercury in eight tissues of herring gulls ( Larus argentatus), were measured by atomic absorption spectrophotometry. 2. Zinc and mercury were detectable in most samples, but cadmium was only measurable in the kidney (mean conc., 13.7 ± 1.8 mgCd/kg) and liver (mean conc. <1.86 ± 0.25 mgCd/kg). 3. The highest zinc levels were found in the intestine (140 ± 9.8 mg/kg) and in the gastrocnemius muscle (123 ± 17 mg/kg). 4. Cadmium and zinc concentrations were strongly correlated in the kidneys ( P < 0.001) and there was also a positive correlation between the levels of cadmium in the livers and kidneys ( P < 0.05). 5. The gastrocnemius muscle contained a significantly higher zinc concentration than either the heart or pectoral muscle. ( P < 0.01).
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