DECLINES IN ORGANOCHLORINES IN EGGS OF RED-BREASTED MERGANSERS FROM LAKE-MICHIGAN, 1977-1978 VERSUS 1990

Authors
HEINZ GH MILLER DS EBERT BJ STROMBORG KL
Citation
Gh. Heinz et al., DECLINES IN ORGANOCHLORINES IN EGGS OF RED-BREASTED MERGANSERS FROM LAKE-MICHIGAN, 1977-1978 VERSUS 1990, Environmental monitoring and assessment, 33(3), 1994, pp. 175-182
Citations number
NO
Categorie Soggetti
Environmental Sciences
Journal title
Environmental monitoring and assessment → ACNP
ISSN journal
01676369
Volume
33
Issue
3
Year of publication
1994
Pages
175 - 182
Database
ISI
SICI code
0167-6369(1994)33:3<175:DIOIEO>2.0.ZU;2-Z
Abstract
From 1977-1978 to 1990, concentrations of polychlorinated biphenyls (P CBs) and most organochlorine pesticides declined in eggs of red-breast ed mergansers (Mergus serrator) nesting on islands in northwestern Lak e Michigan. Total PCBs decreased 60% (from 21 ppm in 1977-1978 to 8.5 ppm in 1990) and p, p'-DDE decreased 66% (from 6.5 to 2.2 ppm). Dieldr in decreased only 16% (from 0.82 to 0.69 ppm). In 1990, 79.1% of incub ated eggs hatched, which was not significantly different from the 83.5 % that hatched in 1977-1978.