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1994 Washington D.C. Briefing Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin
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1994 Washington D.C. Briefing Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin
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1994 Washington D.C. Briefing Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin
State
CO
Basin
Colorado Mainstem
Date
3/21/1994
Title
1994 Washington D.C. Briefing Recovery Implementation Program for Endangered Fish Species in the Upper Colorado River Basin
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Report/Study
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► Appendix B <br />Fish Population Status and Recovery Goals <br />Colorado Squawfish <br />' The Green River populations of this fish species are the largest in the Colorado River Basin and <br />are showing evidence of increasing. Elsewhere, Colorado squawfish populations are small. <br />They may be declining in the Colorado River and appear to be stable in the Yampa River. <br />Recovery goals for this fish species are to establish naturally self - sustaining populations in the <br />Green River and Colorado River subbasins. <br />Humpback Chub <br />'1 <br />IJ <br />t <br />In the Green and Yampa Rivers, humpback chub populations are very small. In the Colorado <br />River near the Utah- Colorado State line, the population is relatively large and appears healthy. <br />Recovery goals are to establish five viable, self - sustaining wild populations and protect their <br />habitat. Primary recovery areas in the Upper Basin include: the Black Rocks /Westwater Canyon <br />of the Colorado River near the Colorado /Utah State line; the Yampa and Green Rivers in <br />Dinosaur National Monument; Gray and Desolation Canyons in the Green River; and Cataract <br />Canyon in the Colorado River. <br />Razorback Sucker <br />Most razorbacks captured in recent years in the Green, Colorado, and Yampa Rivers are thought <br />to be more than 20 years old and there is no known "recruitment" of young fish into the adult <br />population. In other words, no young are surviving to adulthood. As a result razorback sucker <br />populations are considered critical. <br />The first recovery priority for the razorback is to prevent their extinction in the wild. <br />Bony ail Chub <br />The bonytail chub is the most endangered of the four listed fish. The last confirmed sighting <br />was in 1981 in the Colorado River near the Colorado -Utah State line. Captive populations of <br />bonytail are being maintained at Dexter National Fish Hatchery (NM) and the Horsethief State <br />Wildlife Area in Colorado. Like the razorback, the primary recovery goal is to prevent their <br />extinction in the wild. <br />
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