Northeast Region Features
Conserving the Nature of America

yellow perch eggs
From the 1920s to 2005, the hatching of yellow perch eggs has gone from 80 down to 10 percent (Maryland DNR).
Credit: Maryland DNR

Fish abnormalities linked to development and pollution in three Maryland rivers

Federal and state scientists have found reproductive abnormalities in yellow perch in three Maryland rivers that flow through highly suburban or rapidly developing areas. The results of the three-year study by U.S. Geological Survey, U.S. Fish and Wildlife Service and Maryland Department of Natural Resources help explain the biology behind poor survival of yellow perch eggs and larvae in some Chesapeake Bay tidal rivers running through suburban areas. Published studies suggest these abnormalities result from exposure to environmental contaminants, but more research is necessary to identify specific contaminants and their role in fish reproduction.

Fact sheet on study
Baltimore Sun news story
More contaminants research in the Bay

Published on: Wednesday, February 20,2013

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