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<br />002753 <br /> <br />occurred since June of 1990. The Recovery Program has no plan at this time for additional stocking <br />of Colorado squawfish. <br /> <br />Bony tail chub: Stocking efforts associated with the bonytail chub have been minimal. An <br />experimental stocking project was conducted in 1988. A total of 86 bonytaiI were surgically <br />implanted with radio transmitters and released into the Green River in Dinosaur National Monument. <br />Documented mortality of these fish was 74.5%. A "Bonytail Reintroduction Plan for the Upper <br />Colorado River Basin" was submitted in March, 1996. On October 1 8, 1996, a total of 1,996 tagged <br />bonytail were stocked into a large backwater area at Dewey Bridge along the Colorado River. The <br />fish averaged 131 mm (5 inches) in length with a range of90-172 mm (3.5 - 7 inches). Projected <br />stocking during FYs 97 and 98 includes 5,000 fish - six inches in mean length- in both the Green and <br />Colorado Rivers. During FY 1998, an additional 2,000 to 5,000 fish of similar mean length will be <br />stocked into each of two additional locations. <br /> <br />Humpback chub: All stocking of humpback chub occurred prior to the initiation of the Recovery <br />Program. A total of7,400 humpback chub were tagged and stocked in the Cataract Canyon area of <br />the Colorado River in December, 1981. Since then, no additional stocking has occurred. The <br />Recovery Program has no plan at this time for stocking of humpback chub. <br /> <br />Razorback sucker: Experimental stocking of razorback sucker in the Green River was first <br />performed in September, 1988. A total of 1,879 razorback sucker were tagged and stocked during <br />a 16-day period. An additional 4,488 razorback were tagged and stocked into the Green River in <br />September, 1990. One razorback sucker stocked in 1990 was recovered the following spring. Five <br />family lots containing 929 captive-reared razorback suckers were PIT -tagged and stocked into the <br />Middle Green River in October, 1995. The following year, sampling efforts did not collect any fish <br />from this stocking, suggesting no survival occurred. In addition, 21 PIT -tagged razorback suckers <br />from natural propagation that survived in Old Charlie Wash were also stocked in October, 1995 into <br />the Middle Green River at the same location. <br /> <br />In the spring of 1994, 20 radio-tagged razorback sucker were stocked in the Upper Colorado River <br />and 21 were stocked in. the Gunnison River. In September, 1995, only five of those fish were still <br />alive. An additional four adult razorback sucker from Etter Pond were radio tagged and held in <br />refugia ponds at Horsethief SW A until being released in the Gunnison River in October, 1995. In <br />October, 1995, 316 razorback were stocked in the Gunnison River downstream of the Hartland <br />Diversion Dam. <br /> <br />In November, 1995, a stocking plan for razorback sucker in the Upper Colorado and Gunnison Rivers <br />was developed. This stocking plan provided the rationale to reintroduce razorback sucker in the <br />Upper Colorado River (Rifle, Colorado downstream to its confluence with the Green River: river <br />miles 241-0) and Gunnison River (river miles 68-0.7) with the intent of reestablishing a population <br />between the years 1995 and 2000. The short-term goal of this initial stocking effort is to establish <br />an adult population of about 10 adults per river mile of the two rivers. The long range or ultimate <br />goal is to establish self-sustaining populations in both the Colorado and Gunnison Rivers. The plan <br />proposes to stock 13,] 00 razorbacks per year in FY96 and FY97, 26,200 in FY98, 39,200 in FY 99, <br />and 52,400 in FY 2000, ranging in size from 4-12 inches. However, due to the limited availability <br /> <br />IX <br />