if they are still present. The most important cause of the fish's decline in abundance would appear to be siltation due to human practices of agriculture. There do not appear to be any refuges or conservation easements specific to the lake chubsucker as it is not considered endangered. In Canada some research was conducted to determine how the lake chubsucker was faring, since it has been extirpated in several areas. With no further harm and no recovery efforts, it was suggested that the extant lake chubsucker populations would reach minimum viable population standards in about 12 years. Populations of E. sucetta in Louisiana, Mississippi, Alabama, and Georgia, are listed as secure; Michigan's is ranked as apparently secure, Texas, Oklahoma, Tennessee, North Carolina, Indiana, and Wisconsin are listed as vulnerable, and the populations of Arkansas, Missouri, Illinois, Kentucky, Ohio, Virginia, and Ontario are imperiled. The fish is presumed extirpated in Iowa and Pennsylvania. References Catostomidae Fish described in 1803