1. North Carolina Cooperative Fish and Wildlife Research Unit Department of Applied Ecology North Carolina State University Raleigh North Carolina 27695 USA
2. U.S. Geological Survey North Carolina Cooperative Fish and Wildlife Research Unit Department of Applied Ecology North Carolina State University Raleigh North Carolina 27695 USA
3. Department of Applied Ecology North Carolina State University Raleigh North Carolina 27695 USA
4. North Carolina Wildlife Resources Commission Inland Fisheries Division 645 Fish Hatchery Road Marion North Carolina 28752 USA