SREL Reprint #2249

Upstream mobility of the Asiatic clam Corbicula fluminea: identifying potential dispersal agents

Neal J. Voelz, J. Vaun McArthur, and Russell B. Rader

Savannah River Ecology Laboratory, University of Georgia, Drawer E, Aiken, SC 29802 USA

Abstract: Based on studies conducted in 1987 and 1993, we have determined that the Asiatic clam, Corbicula fluminea, has moved upstream at least 1.2 km/year in a southeastern U.S. blackwater stream. Since these studies were done in a protected area (the Savannah River Site, South Carolina), our data suggest that this was a process unaided by humans. In addition, the upstream movement has been halted by a large, permanent wetland and two culverts. Because the Asiatic clam has not colonized headwater areas, where several wetlands exist, this precludes the aided movement of C. fluminea by waterfowl. It is possible that fish are partially responsible for dispersing C. fluminea, at least for longer distances. We suggest that unassisted upstream movements may also be an important dispersal mechanism for this species.

SREL Reprint #2249

Voelz, N.J., J.V. McArthur, and R.B. Rader. 1998. Upstream mobility of the Asiatic clam corbicula fluminea: identifying potential dispersal agents. Journal of Freshwater Ecology 13:39-45.

This information was provided by the University of Georgia's Savannah River Ecology Laboratory (srel.uga.edu).