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Polychlorinated biphenyls and organochlorine pesticides in various bird species from northern China |
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| Authors: | Da Chen Bixian Mai Jie Song Eddy Y. Zeng |
| Affiliation: | a Department of Environmental and Aquatic Animal Health, Virginia Institute of Marine Science, The College of William and Mary, 1208 Greate Road, Gloucester Point, VA 23062, USA b State Key Laboratory of Organic Chemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China c Beijing Raptor Rescue Center, International Fund for Animal Welfare, Beijing 100875, China d Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing 100875, China |
| Abstract: | Little data are available on organochlorine contamination in Chinese terrestrial birds of prey. This study examined the presence of PCBs, DDTs and other organochlorine pesticides in various raptors from northern China. DDE exhibited the highest concentrations among targeted compounds. Greatest levels (23.5-1020 mg/kg lipid weight) were observed in Eurasian sparrowhawks. This may be due to their stopover in southeastern China, where high DDT and dicofol applications have been documented. Residential kestrels exhibited much lower DDE, but similar PCB and HCH concentrations. ΣTEQs and PCB-126/-77 concentration ratios exhibited significant positive correlations with ΣPCB concentrations, respectively. Similar results were also demonstrated by a meta-analysis of previously published data across avian species. Possible hepatic sequestration of coplanar PCB-77, -126, -169 and -118 was observed as liver TEQs increased in Eurasian sparrowhawks. These observations may indicate an induction of CYP1A enzymes, as a result of elevated contamination in some species. |
| Keywords: | Bird Organochlorine TEQ CYP1A induction Hepatic sequestration |
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