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Polychlorinated biphenyls and organochlorine pesticides in local waterbird eggs from Hong Kong: risk assessment to local waterbirds |
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| Authors: | Wang Yuan Murphy Margaret B Lam James C W Jiao Liping Wong Captain C L Yeung Leo W Y Lam Paul K S |
| Affiliation: | a Jiangsu Academy of Environmental Science, No. 241 Fenghuang West Road, Nanjing 210036, People’s Republic of China b State Key Laboratory in Marine Pollution, Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China c Third Institute of Oceanography, State Oceanic Administration, No. 174, Daxue Road, Xiamen 361005, People’s Republic of China d Key Laboratory of Global Change and Marine-Atmospheric Chemistry, State Oceanic Administration, 178 Daxue Road, Xiamen, Fijian, People’s Republic of China e Kadoorie Farm and Botanic Garden (KFBG), Lam Kam Road, Tai Po, New Territories, Hong Kong SAR, People’s Republic of China |
| Abstract: | The contamination status of the marine environment in Hong Kong was studied by measuring concentrations of organochlorine (OC) pollutants (i.e., hexachlorobenzene, aldrin, dieldrin, endrin, mirex, total heptachlor, total chlordane, total DDTs, total PCBs, and total toxaphenes) in the eggs of selected waterbird species from different locations around the city: Little Egret (Egretta garzetta) and Chinese Pond Heron (Ardeola bacchus) from Mai Po Village, Great Egret (Ardea alba) and Black-crowned Night Heron (Nycticorax nycticorax) from A Chau, and Chinese Pond Heron (A. bacchus) from Ho Sheung Heung. The mean concentrations of total PCBs and total DDTs ranged from 191-11 100 ng g−1 lipid and 453-49 000 ng g−1 lipid, respectively. Recent exposure of waterbirds to technical chlordane was found in Hong Kong. The risk characterization demonstrated potential risks to birds associated with exposure to DDE, which was found to cause a reduction in survival of young in Hong Kong Ardeids based on the endpoint in the risk assessment. |
| Keywords: | PCBs Organochlorinated pesticides Waterbird egg DDT Risk assessment |
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