#4 (September 17, 1990)

Editor's Note
Zebra Mussel Sightings in Wisconsin
Status Elsewhere
Other Monitoring Efforts
Preserving Zebra Mussel Veligers
Economic Impact of Zebra Mussels
Information Clearinghouse Set Up
Upcoming Conferences
Wisconsin Officials Given Stern Warning

The Zebra Mussel Update was a 4- to 8-page quarterly national newsletter published by the University of Wisconsin Sea Grant Institute from May 1990 through May 1997. The ZMU documented the spread of the zebra mussel -- an exotic nuisance mussel -- through North America's freshwater environments, especially the Great Lakes, and on efforts to control it.