Lake Chub inhabits cold-water lakes and streams with clean gravel and is native to 11 of 18 watersheds. Its distribution in the Adirondacks has undergone little change but there has been a substantial decline in six of the 11 watersheds. It has declined to levels below detection in the Ontario, Oswego and Lower Hudson watersheds. Its abundance in the Delaware, Saint Lawrence and Raquette watersheds has declined. These declines occurred in peripheral and lower-elevation areas where water temperature may be a factor.