Rank MethodExpertise without calculation
Review Date2011-12-01
Change Date1996-09-13
Edition Date2011-12-01
Edition AuthorsHammerson, G.
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 to >300
Range Extent CommentsRange includes the North American Atlantic Slope from Nova Scotia (where introduced) to southern Florida; Gulf Coast west to Red River drainage, Oklahoma, and Sabine Lake drainage, Texas; Mississippi River basin north to Kentucky and Missouri; has expanded through man-made waterways around periphery of native range; introduced into drainages of lakes Ontario and Erie and in other drainages west to Colorado (Page and Burr 2011).