Polychlorinated biphenyls and chlorinated pesticides in southern Ontario, Canada, green frogs

摘要

Green frogs were collected from seven southern Ontario, Canada, locations and analyzed for chlorinated organic chemicals to establish the relative distribution of these chemicals at specific sites. At Hillman Marsh, a wildlife reserve in an agricultural area, green frogs accumulated significantly greater amounts of highly chlorinated Polychlorinated biphenyls (PCBs) than green frogs from all other collection sites. The source of PCBs is unknown. At Ancaster, 1,1-dichloro-2, 2-bis (p-chlorophenyl) ethylene (DDE) accumulated in green frogs to a significantly greater extent than at all other sites.