Laserfiche WebLink
11 <br />(Miller 1961, Joseph et al. 1977, Behnke and Benson 1983, Carlson <br />and Muth 1989, Tyus and Karp 1989). These factors are almost <br />certainly not mutually exclusive, therefore it is often difficult <br />to determine exact cause and effect relationships." <br />The virtual absence of any recruitment suggests a combination of biological, <br />physical, and /or chemical factors that may be affecting the survival and <br />recruitment of early life stages of razorback suckers. Within the Upper <br />Basin, recovery efforts endorsed by the Recovery Implementation Program <br />include the capture and removal of razorback suckers from all known locations <br />for genetic analyses and development of discrete brood stocks if necessary. <br />These measures have been undertaken to develop refugia populations of the <br />razorback sucker from the same genetic parentage as their wild counterparts <br />such that, if these fish are genetically unique by subbasin or individual <br />population, then separate stocks will be available for future augmentation. <br />Such augmentation may be a necessary step to prevent the extinction of <br />razorback suckers in the Upper Basin. <br />Critical Habitat <br />Critical habitat has been proposed within the 100 -year floodplain of the <br />razorback sucker's historical range in the following sections of the Upper <br />Basin, excluding the San Juan River Basin (58 ER 6578). <br />Colorado, Moffat County. The Yampa River and its 100 -year floodplain <br />from the mouth of Cross Mountain Canyon in T. 6 N., R. 98 W., section 23 <br />(6th Principal Meridian) to the confluence with the Green River in <br />T. 7 N., R. 103 W., section 28 (6th Principal Meridian). <br />Utah, Uintah County* and Colorado. Moffat County. The Green River and <br />its 100 -year floodplain from the confluence with the Yampa River in <br />T. 7 N., R. 103 W., section 28 (6th Principal Meridian) to Sand Wash at <br />river mile 96 in T. 11 S., R. 18 E., section 20 (6th Principal <br />Meridian). <br />Utah, Uintah, Carbon, Grand, Emery. Wayne. and San Juan Counties. The <br />Green River and its 100 -year floodplain from Sand Wash at river mile 96 <br />at T. 11 S., R. 18 E., section 20 (6th Principal Meridian) to the <br />confluence with the Colorado River in T. 30 S., R. 19 E., section 7 <br />(6th Principal Meridian). <br />Utah, Uintah County. The White River and its 100 -year floodplain from <br />the boundary of the Uintah and Ouray Indian Reservation at river mile 18 <br />in T. 9 S., R. 22 E., section 21 (Salt Lake Meridian) to the confluence <br />with the Green River in T. 9 S., R 20 E., section 4 (Salt Lake <br />Meridian). <br />Utah, Uintah County. The Ouchesne River and its 100 -year floodplain <br />from river mile 2.5 in T. 4 S., R. 3 E., section 30 (Salt Lake Meridian) <br />to the confluence with the Green River in T. 5 S., R. 3 E., section 5 <br />( Uintah Meridian). <br />