Invasion

Invasion Description

None

Geographic Extent

Major spawning populations in James, Potomac, Susquehanna Rivers, now reduced by dams, restoration in progress.Formerly, Susquehanna populaitons migrated as fa as Binghamton, NY (Hildebrand and Schroeder 1928; Jenkins and Burkhead 1993; Murdy et al. et al. 1997)