Range
The species was once found throughout the Colorado basin, so occurred in Arizona, California, Colorado, Nevada, New Mexico,Utah, and Wyoming, as well as in Mexico. Damming and habitat alterations have confined the species to the upper Colorado drainage; currently, remnant populations are known from the Green River, Gunnison River, White River, San Juan River, and Yampa River. Additionally, land managers in the past have attempted to reduce the native fish population of the Colorado basin in favor of sport fishing. In the mid-1960s, the Federal government poured the poison rotonone into the Green and San Juan Rivers, attempting to create an environment supportive of non-native sportfish. They have been transplanted to the Salt River and Verde River, both outside their native range.
Read more about this topic: Colorado Pikeminnow
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