Zoogeography of the Grass Carp in the United States

Abstract Since 1963, the grass carp, Ctenopharyngodon idella Val., has spread to at least 35 states through stockings and subsequent dispersal. Grass carp have been found in several major river systems and in areas near research sites. Further spread of the species will probably occur with increased research and stocking of grass carp for weed control.