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002791 Table 6.2-1, adapted from the Bonytail Reintroduction Plan (Lentsch et aL 1996), provides a summary of the bonytail stocking plan through FY 1998. Table 6.2-1 Projected Stocking of bony tail chub Mean Fish Year Stocking Location (River) Size (inches) Number of Fish FY 1996 Green River Valley (Green) 6 2,000 Moab Canyon (Colorado) 6 2,000 FY 1997 Green River Valley (Green) 6 5,000 Moab Canyon (Colorado) 6 5.000 FY 1998 Green River Valley (Green) 6 5,000 Moab Canyon (Colorado) 6 5,000 additional site 6 2.000-5.000 additional site 6 2,000-5,000 Note: Number, size. and stocking location may change depending on findings from laboratory and field studies. On October 18, 1996, a total of 1.996 PIT-tagged bonytail were stocked into a large backwater area at Dewey Bridge along the Colorado River (Lentsch 1996). The fish averaged 131 mm (5 inches) in length with a range of90-172 mm (3.5 - 7 inches). The stocking locations listed in Table 6.2- I above are located outside the designated critical habitat areas described in Section 2.2.2. 6.3 Humpback Chub All stocking of humpback chub occurred prior to the initiation of the Recovery Program. A total of 7,400 humpback chub were tagged and stocked in the Cataract Canyon area of the Colorado River in December, 1981 (Appendix A). Since then, no additional stocking has occurred. Adult humpback chubs from Black Rocks Canyon were captured in 1995 and placed in refuge at the Horsethief SW A to protect this stock from a catastrophic loss. The Recovery Program has no plan at this time for stocking of humpback chub. 6.4 Razorback Sucker From 1988 through 1995, several initial efforts at stocking razorback sucker in the Green and Colorado Rivers were made. The following sections discuss these initial efforts as well as the experimental stocking plans for the Upper Colorado, Gunnison, and Middle Green Rivers. 31