Dreissena polymorpha, the zebra mussel, a pestiferous mollusk from Eurasia, has spread throughout the navigable waters of the Northeastern United States since its introduction into the Great Lakes system in 1986 (Maxwell, 1992). The appearance of these organisms in the Mohawk River system was first reported in 1991 (O'Neill, 1991). By the summer of 1994 zebra mussels had successfully colonized ...
