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<br />Hatchery, Ouray, Utah (Ouray) with associated locally leased grow-out ponds throughout the <br />Uintah Basin, <br />Approach <br />Broodstock.-In the upper Colorado River, a variety of fish from the Green; Colorado <br />and Gunnison rivers, and both the Colorado River and San Juan River arms of Lake Powell, have <br />been used to produce razorback sucker for stocking plans in both the Colorado and Sari Juan <br />rivers, A breeding matrix that follows the genetic guidelines is used to maintain genetic diversity <br />and reduce inbreeding, <br />In the Green River, the Recovery Program has developed 25 lots from 25 male x 25 <br />female parents to maintain the genetic diversity, These will be used in a breeding matrix in order <br />to develop F I fish for augmentation, <br />Rearing Location Prior to Stocking (see Table 2).-In the Upper Colorado River, <br />razorback sucker are raised intensively in 4-foot and 8-foot diameter tanks at the 24 Road <br />hatcheIY building for the first season and are distributed to a variety of grow-out ponds in the <br />spring after the first year, Assuming that these gtow-out ponds can produce 500 pounds of fish <br />per acre, 18,1 acres are required on annual basis to produce 16,440 razorback sucker that are <br />greater than 300 rom TL and weigh about 250 g, Since this size is normally achieved by the <br />third growing season, twice as much acreage is required to meet the two years of growth (i,e" <br />36,2 acres). The Recovery Program currently has approximately 98 acres of grow-out ponds <br />throughout the Grand Valley area. <br />In the past, razorback sucker at Ouray have been raised extensively in 0.2-acre hatchery <br />ponds during the first season of growth. Thc Ouray facility is being modified to have a water re- <br />use system for the inside culture during the first calender year, Assuming hatchery ponds can <br />produce 1,000 pounds offish per acre, 5,0 acres of hatchery ponds could be used for the second <br />year of growth, and the ponds would yield 9, I 00 razorback sucker that are greater than 300 rom <br />TL and weigh about 250 g, An additional 10.4 acres of leased grow-out ponds that produce 500 <br />pounds of fish per acre, would yield 9,400 razorback sucker that are greater than 300 rom TL and <br />weigh about 250 g, The combination of using hatchery and leased grow-out ponds would yield <br />18,500 to meet the State of Utah stocking plan requirement. Because fish of this size are <br />normally achieved by the third growing season, the fish may have to be held a third growing <br /> <br />6 <br />