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10 I. Examine the feasibility of establishing a supplemental stocking program for humpback chub in Grand Canyon using wild caught young of year (YOY) humpback chub removed from the Little Colorado River (LCR) and grown out to a large size in captivity. 2. Examine the feasibility of developing a captive broodstock to be used for a captive breeding program for humpback chub. 3. Examine the feasibility of establishing a second spawning (or expand the current) population of humpback chub in Grand Canyon. End Product (Performance Measures I. For the feasibility of supplemental stocking using growout facilities, the project will answer the following questions: a. Where could the supplemental fish be grown? b. What size fish should be collected, how, from where, and when? c. What is the best size to grow out captive fish before release? d. How many fish will need to be released into the wild in order sufficiently supplement the population of humpback chub in Grand Canyon? e. Where and when will fish be released back into the wild? 2. For the feasibility of establishing a supplemental population using broodstock, the project will answer the following questions: a. Is a captive adult broodstock needed at this point in time, and what will it contribute? b. Identification of components necessary to develop a broodstock management plan. c. Where to hold broodstock, where to raise fish, what size to raise fish, how many, where/when to release? 3. For the feasibility of extending the range of the Little Colorado River population, the project will focus on: a. b. Transplanting fish above Chute Falls Refugia population in Havasu Creek and other tributaries 4. Report and evaluation of each objective, including recommendations for future action. V. Study Area: Colorado River Basin VI. Study Methods/Approach: VII. Task Description and Schedule: VIII. FY 2004 Work: February 2003 - June 2003 IX. Budget Summary: FY 2003: $23,000 Created on 5/6/2003 5:41 PM 0090S