Updated status of the River Redhorse, Moxostoma carinatum, in Canada

Abstract

The River Redhorse, Moxostoma carinatum , is rare in Canada. Reproducing populations of this large member of the sucker family have been located in four river systems in eastern Ontario and southwestern Quebec. Small populations have been reported from the Mississippi River, a tributary to the Ottawa River in Ontario, and the Richelieu and Yamaska River basins in Quebec. Specimens are also taken occasionally from the Ottawa River near Ottawa, and the St. Lawrence River near Montreal. This species reaches its northeastern range limit in Canada and Canadian populations are geographically separate from those in the U.S.A