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<br />,':'~;. , <br /> <br />Lt. Colonel Dorothy F. Klasse <br /> <br />was collected at the confluence with the Mancos River. which is the first <br />specimen collected at this site since 1987 (Frank Pfeifer. USFWS. pers. <br />comm.) . <br /> <br />11 <br /> <br />The San Juan River is one of only three remaining areas where a wild. <br />reproducing population of Colorado squawfish still persists. The San Juan <br />River subbasin. isolated from the Colorado and Green River subbasins. provides <br />a third population of wild fish. contributing an additional essential buffer <br />against a catastrophic event (such as an oil spill) elsewhere in the basin. <br />While the Colorado squawfish population may be small in the San Juan River. it <br />may be important as unique genetic stock. Because of this the Colorado River <br />Fishes Recovery Team (consisting of scientists from the entire Colorado River <br />Basin. including representatives from State wildlife agencies of California. <br />Arizona. New Mexico. Utah. and Colorado. as well as Federal representatives <br />from the National Park Service. Reclamation. and the Service) recommended that <br />the San Juan River be added to the Colorado squawfish recovery plan. The <br />updated Colorado Squawfish Recovery Plan (August 6. 1991) states that the <br />species can be downlisted to threatened when all recovery areas (including the <br />San Juan River from Lake Powell upstream to the confluence of the Animas <br />River) have naturally self-sustaining populations. The San Juan River is also <br />included in the delisting criteria. <br /> <br />Critical Habitat <br /> <br />Critical habitat has been designated within the loo-year floodplain of the <br />Colorado squawfish's historical range in the following section of the San Juan <br />River Basin (59 F.R. 13374). <br /> <br />New Mexico San Juan Countv' and Utah San Juan County. The San Juan <br />River from the State Route 371 Bridge in T. 29N.. R. 13 W.. section 17 <br />to Neskahai Canyon up to the full pool elevation in the San Juan arm of <br />Lake Powell in T. 41 S.. R. 11 E.. section 26. <br /> <br />Razorback Sucker <br /> <br />Historical and Current Distribution <br /> <br />i ,:;~ <br /> <br />. <br /> <br />. <br /> <br />The razorback sucker. an endemic species unique to the Colorado River Basin. <br />was historically abundant and widely distributed within warmwater reaches <br />throughout the Colorado River Basin. Historically. razorbacks were found in <br />the main stem Colorado River and major tributaries in Arizona. California. <br />Colorado. Nevada. New Mexico. Utah. Wyoming. and in Mexico (Ellis 1914:. <br />Minckley 1973). Bestgen (990) reported that uris species was once so . <br /> <br />\ ~ <br />