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Table 1. Number of fish by size group projected to evaluate the relation between survival of razorback sucker and size at release into the river, 1995 through 2001, and actual numbers of razorback sucker stocked, 1994 through 2001, in the Upper Colorado and Gunnison rivers, Colorado. (see Appendix; Tables C.1.-C.7. for size ranges of razorback sucker stocked by year). Approximate Year Mean Size Number of Actual Number Stocked Stocking Location of Fish Fish" of Fish Stocked 1994 Gunnison River 450-550-mm --- 25 Colorado River 450-550-mm --- 20 1995 Gunnison River b 100-199mm 10,000 316 near Delta 200-299mm 2,500 300-mm 600 1996 & 1997 Gunnison River 100-199mm 10,0 near Delta 200-299mm 0 2,500 3,441 + 300-mm 600 573 19984 Gunnison River 100-199-mm 20,000 158 near Delta 200-299-mm 5,000 307 + 300-mm 1,200 143 1999 Gunnison River 100-199mm 30,000 2,048 near Delta 200-299mm 7,500 688 + 300-mm 1,800 36 1999 Colorado River 100-199mm 30,000 3,075 near Parachute 200-299mm 7,500 418 300-399mm 1,800 5 2000 Gunnison River 100-199mm 40,000 3,785 near Delta 200-299mm 10,000 2,761 + 300-mm 2,400 41 2000 Colorado River 100-199mm 40,000 19,141 near Parachute & 200-299mm 10,000 6,290 15-Mile Reach + 300-mm 2,400 79 2001 Gunnison River 100-199-mm 40,000 203 near Delta 200-299-mm 10,000 3,113 300-mm 2,400 785 2001 Colorado River 100-199-mm 40,000 137 near Parachute & 200-299-mm 10,000 1,784 15-Mile Reach + 300-mm 2,400 232 'Number of fish adjusted depending upon the number of fish produced from paired matings, survival to stocking, and available rearing space b Minimum size of razorback sucker that can be safely PIT tagged Numbers determined from a 75:20:5 ratio 4 Additional propagation facilities available in FY98 to allow for increased production of young fish 14