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<br />Table I.-Summary of species status (includes preliminary data and data in draft reports undergoing peel' and Biology Commitlee <br />review; information drawn from presentations at the August 2004 population estimates workshop). <br /> <br /> RIVER SYSTEM <br />SPECIES MIDDLE GREEN LOWER GREEN UPPER COLORADO <br />Color.do Estimates ranged from about 3,300 adults in 2001 to about 2,300 adults in 2003 (draft report Estimates ranged from about 500 adults in <br />pikeminnow undergoing peer and Biology Committee review). 1992 to 600-700 in recent years. <br /> 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 currently <br /> underway. <br />Humpb.ck YamDa Canyon: Population small; about Desolation/Gray Canyon: Estimates of adults Black Rocks Canyon: Estimates of adults <br />chub 400 adults, with wide confidence intervals varied from about 2,000 in 200 1,2,200 in varied from about 800 in 1998, 900 in 1999, <br /> around the point estimates. 2002, and 1,000 in 2003. Sampling in 200 I and 500 in 2000 and 2003 (wide confidence <br /> Cl:nd 2002 conducted in sUlllmer (wide intervals). <br /> confidence intervals), whereas sampling in Westwater Canyon: Estimates of adults ranged <br /> 2003 conducted in fall (draft report from about 4,700 in 1998 (wide confidence <br /> undergoing peer and Biology Committee interval) to 2,500 in 1999,2000, and 2003 . <br /> review). . (confidence intervals narrowed over time). <br /> Cataract Canyon: Population small; about 150 <br /> adults ill 2003, with estimates continuing in <br /> 2004. <br /> LOWER COLORADO, GRAND CANYON: 2,000--4,000 adults (not including the mainstem); methods being reviewed to improve estimate. <br /> <br />3 <br /> <br />=> <br /> <br />=. <br /> <br />>-' <br />~ <br />c, <br /> <br />....... <br />