Environmental Monitoring and Assessment

, Volume 33, Issue 3, pp 175–182 | Cite as

Declines in organochlorines in eggs of red-breasted mergansers from Lake Michigan, 1977–1978 versus 1990

  • Gary H. Heinz
  • David S. Miller
  • Brian J. Ebert
  • Kenneth L. Stromborg
Article

Abstract

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. 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). Dieldrin decreased only 16% (from 0.82 to 0.69 ppm). In 1990, 79.1% of incubated eggs hatched, which was not significantly different from the 83.5% that hatched in 1977–1978.

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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Gary H. Heinz
    • 1
  • David S. Miller
    • 2
  • Brian J. Ebert
    • 3
  • Kenneth L. Stromborg
    • 4
  1. 1.Patuxent Environmental Science CenterU.S. National Biological SurveyLaurelUSA
  2. 2.Allen ParkUSA
  3. 3.Laidlaw Environmental Services (GS), Inc.SaukvilleUSA
  4. 4.U.S. Fish and Wildlife ServiceGreen BayUSA

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