Notable Sightings Elsewhere

From October 11, 1991 (update #11)

KNOXVILLE, Tenn. - A single zebra mussel, slightly less than one inch (23 mm) in length, was found Sept. 10 attached to a three-ridge mussel in Kentucky Lake by a commercial clammer, according to Tennessee Valley Authority biologist Steve Ahlstedt. Kentucky Lake is an impoundment on the Tennessee River, which Ahlstedt said has an extensive commercial fishery for native mussels. The lake is navigable by commercial barge traffic from the Ohio River and attracts a lot of angling attention for its sport fishery. Ahlstedt also reported that zebra mussels were confirmed for the first time in the Ohio River on Oct. 7 from a location below Lock 53 near Mound City, Ill., not far from the river's confluence with the Mississippi River.

HAVANA, Ill. - Zebra mussels continue to turn up in the Illinois River, according to Illinois Natural History Survey biologist Doug Blodgett. They have become abundant enough near Hennepin, Ill., to begin appearing on substrate samplers at that location, and they appear to be growing rapidly, Blodgett said. He also confirmed reports of zebra mussels found in the Mississippi River near Alton, Ill., in the vicinity of Lock 26.

AMHERST, N.Y. - Zebra mussel veligers were found in abundance at several different locations in the Hudson River during September, according to Cameron Lange of Acres International Corp. This evidence of widespread reproduction follows closely on the heels of the first report of adult mussels in the Hudson watershed last May, and infrequent findings of adult mussels during the summer.

PICTON, Ont. - The most recent round of sampling in August showed that zebra mussel veligers were still restricted to westernmost Lake Ontario, but "it would be premature to conclude that (their) spread has slowed down," according to a Sept. 30 report from the Ontario Ministry of Natural Resources' Lake Ontario Fisheries Unit here. Veliger distribution in Canadian waters of the lake did not change through the summer, the OMNR unit reports, and abundances decreased somewhat in August. Nearly all of the veligers detected were found in water samples in a crescent from Niagara-on-the-Lake to Scarborough. The highest reported density was 3,800 per cubic yard (2,904/m3) in a June sample from Grimsby.

ID: 19911011-3.

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.