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Table 1.-'-Surnmary of species status. SPECIES Colorado pikeminnow Humpback chub Razorback sucker About 3,500 adults (based on 2000 data); report on 2000--2003 estimates due March 2004. RIVER SYSTEM LOWER GREEN Estimates initiated in 2001; report on 2001-2003 estimates due March 2004. UPPER COLORADO About 780 adults (based on 2003 data); estimates continuing in 2004. SAN JUAN: Estimate of about 20 wild adults based on data collected in the early to mid-1990's; stocking young-of-year fish is currelltly underway. Black Rocks Canvon: About 1,000 adults; estimates continued in 2003. Westwater Canvon: 2,200-4,700 adults based on 3 sampling sites in 1998-2000; effort expanded in 2003. Cataract Canyon: .About 150 adults (based on~ 2003 data); estimates continuing in 2004. LOWER COLORADO, GRAND CANYON: 2,000-4,000 adults (not including the mainstem); methods being reviewed to improvees~e. Yamoa Canvon: Population small, about 400 adults, based on model using 1998-2000 data. Effort expanded in 2003 to develop a more precise estimate. <100 wild adults; population being augmented. through stocking, . which is being expanded with excess fish stocked into selected floodplain depressions; stocked fish are returning to spawning bar; monitoring and evaluation of stocked fish in 2003-2004 being accomplished through sampling conducted for other population estimates and nonnative fish control. Desolation/Grav Canvon: Estimates for 2001 and 2002 were 1,500 and 1,700 adults, respectively; estimates continued with expanded effort in 2003. Few wild adults; population being augmented through stocking; monitoring and evaluation . of stocked fish in 2003-2004 being accomplished through sampling conducted for other population estimates and nonnative fish control. Few wild adults; population being augmented through stocking; larvae collected in Gunnison River in 2002 indicating. reproduction by stocked fish; monitoring and evaluation of stocked fish in 2003-2004 bemg accomplished through sampling conducted for other population estimates and nonnative fish control. SAN JUAN: No estimate of adults is available; stocking l-year-old-plusfish (greater than 300 mm total length) is currently underway. Populations are currently being reintroduced in Colorado, lower Green, middle Green and Yampa rivers; augmentation is being expanded with exCess fish stocked into selected floodplain depressions; survival of stocked fish observed; monitoring and evaluation of stocked fish in 2003-2004 being accomplished through sampling conducted for other population estimates and nonnative fish control.