Colorado Nonnative Fish Stocking Regulation Evaluation. Upper Colorado River Endangered Fish Recovery Program Project No. 106. Final Report.

摘要

In accordance with Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin, the Colorado Division of Wildlife adopted regulations in 1999 to control the stocking of nonnative fish species below 6,500 feet in elevation in the Colorado River Basin, excluding the San Juan River Basin. The Colorado Wildlife Commission conditioned its approval of these new regulations by requiring that an evaluation be conducted to assess whether this strategy contributed to the control of target nonnative fish species within critical habitat for endangered fishes. The methodology chosen to address this question included use of a Geographic Information System (GIS) to provide a comprehensive framework for examining diverse information. This information included pond locations, fish sampling data, and reclamation treatments within the Colorado and Gunnison River corridors surrounding critical habitat, stocking activity for nonnative, nonsalmonid fishes, and sampling data from backwaters within the Grand Valley reach of the Colorado River.