| residue of organochlorine compounds and mercury in birds' eggs from the niagara peninsula, ontario. | eggs (307) were collected in 1971 from twenty species of birds with a variety of feeding habits from the niagara peninsula. this area of ontario is intensively developed for agriculture and heavy industry and has a large urban population. representative species were obtained from both the terrestrial and aquatic food chains. eggs were analyzed for organochlorine insecticides, polychlorinated biphenyls, and total mercury. eggs from carnivorous species at the top of the aquatic food chain had the ... | 1975 | 1155964 |