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<br />COLORADO RIVER RECOVERY PROGRAM <br />FY 2002 ANNUAL PROJECT REPORT <br /> <br />RECOVERY PROGRAM <br />PROJECT NUMBER: 22K <br /> <br />I. Project Title: Humpback chub population estimate in Desolation/Gray Canyon, Green <br />River, Utah. <br /> <br />II. Principal Investigators: <br /> <br />J. Michael Hudson <br />Utah Division of Wildlife Resources <br />Moab Field Station <br />1165 S. Highway 191 - Suite 4 <br />Moab, UT 84532 <br />435-259-3781 Fax: 435-259-3785 <br />Email: michaelhudson@utah.gov <br /> <br />Julie A. Jackson <br />Utah Division of Wildlife Resources <br />Moab Field Station <br />1165 S. Highway 191 - Suite 4 <br />Moab, UT 84532 <br />435-259-3782 Fax: 435-259-3785 <br />Email: juIiejackson@utah.gov <br /> <br />III. Project Summary: <br /> <br />The RIP recently identified recovery goals for the endangered humpback chub. Recovery <br />goals are based in part on maintaining populations of humpback chub in several <br />locations, among which is the Desolation/Gray canyon population on the Green River. <br />Identifying, maintaining, and monitoring a population necessitates obtaining accurate <br />population estimates. <br /> <br />Objectives: <br /> <br />I. To obtain a population estimate oflate juvenile/adult humpback chub in <br />Desolation/Gray Canyon. <br /> <br />2. To determine if a relationship exists between ISMP catch rates and population . <br />sIze. <br /> <br />Two sampling trips were conducted through Desolation/Gray canyons on June 1-8 and <br />June 15-22 to make up the second of the three year population estimate. A third sampling <br />trip was scheduled for June 29-July 6, but was canceled due to low flows. Trips are <br />usually scheduled to target flows below 8000 cubic feet per second (cfs) to maximize <br />catch rates. This year flows during sampling ranged from 5600 to 1800 cfs. In an effort <br /> <br />FY 2002 Annual Report 22k Page - I <br />