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- W2093381937 abstract "Between 1978 and 1983, eggs from 15 species of Antarctic and Subantarctic seabirds were collected and analysed for organochlorine pesticides, PCBs, and mercury residues. The lowest levels of these chemicals were detected in the eggs of Adélie Penguins from Prydz Bay. Antarctica. On a wet weight basis, the mean concentrations in eggs of these penguins were 0.01 μg/g HCB, 0.005 μg/g DDE, less than 0.1 μg/g PCBs (1260) and 0.02 μg/g mercury. Such values indicate that the environmental levels of these contaminants in the biotypes of these species are extremely low, and present no significant threat. The highest levels of contaminants were found in the eggs of species which breed in Antarctica and migrate to regions well north of the Antarctic Convergence in the non-breeding season. On a wet weight basis, Northern Giant-Petrel eggs contained 0.11 μg/g HCB, 0.95 μg/g DDE and 1.8 μg/g PCB (1260), and 1.8 μg/g mercury. There are indications that DDE levels are increasing for both Southern and Northern Giant-Petrels, and it is possible that reports of a decreasing number of breeding pairs of these species at several colonies are due to one or more of these contaminants reaching toxic levels. Analysis of penguin tissues show that preen gland lipid is suitable for monitoring the body burden of organochlorine insecticides and PCBs in seabirds. Variation in DDE and mercury residue levels for some of these species suggest that the biotypes in which they live are quite different, and that the Antarctic Convergence may have a major influence in protecting the Antarctic ecosystem from these pollutants." @default.
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- W2093381937 date "1989-01-01" @default.
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- W2093381937 title "Organochlorine pesticides, PCBs and mercury in antarctic and subantarctic seabirds" @default.
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- W2093381937 doi "https://doi.org/10.1016/0045-6535(89)90024-6" @default.
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