| organochlorine and metal residues in eggs of waterfowl nesting on islands in lake michigan off door county, wisconsin, 1977-78. | one egg from each of 114 red-breasted merganser (mergus serrator) nests in 1977 and 92 nests in 1978 was collected and later analyzed for organochlorines, polybrominated biphenyls (pbbs), polychlorinated styrenes (pcss), and metals. one egg was also collected from each of the dabbling duck nests located. twenty-nine of these eggs were analyzed for organochlorines and metals in 1977; 10 eggs were analyzed in 1978. all merganser eggs contained dde, polychlorinated biphenyls (pcbs), and dieldrin; a ... | 1981 | 6796936 |
| further declines in organochlorines in eggs of red-breasted mergansers from lake michigan, 1977-1978 versus 1990 versus 2002. | from 1977-1978 to 1990, concentrations of polychlorinated biphenyls (pcbs) and most organochlorine pesticides declined in eggs of red-breasted mergansers (mergus serrator) nesting on islands in northwestern lake michigan. further declines took place between 1990 and 2002. between 1977-1978 and 1990 total pcbs decreased 60% (from 21 to 8.5 microg/g, wet weight). an additional decline of 46% took place between 1990 and 2002 (8.5 to 4.6 microg/g). between 1977-1978 and 1990 p,p (')-dde decreased 66 ... | 2009 | 18974941 |