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I I I I I I I I I I I I I I I I I I I SUMMARY Razorback suckers were stocked and successfully reared in ponds at the Lake Powell National Golf Course. The fish originated from stock that were hatched in 1993 at the Ouray National Fish Hatchery located in Vernal, Utah. Fish were stocked at numbers low enough that feeding and other hatchery associated maintenance was not necessary. Occasionally some fish were captured to monitor growth and overall condition and water parameter data was also collected. Mortality was minimal and suckers grew from an average length of less than 115 mm to nearly 360 mm in 12 months. Water quality was generally good, however, under certain conditions dissolved oxygen and possibly pH could be considered marginal. Water conditions could worsen and possibly prove fatal to fish if the water supply or aeration system failed for any length oftime. However, these same concerns and problems exist at hatchery facilities. Some mortality should be expected but inexpensive steps could be taken to safeguard fish health. If the conditions we witnessed continue, the ponds could prove to be an effective, low cost alternative to more expensive, hatchery rearing facilities. We estimate that 300-500, 30 cm fish could be raised per year. The project also provides an excellent opportunity for public education, student programs and volunteerism on endangered fish and other environmental programs. We recommend the National Park Service and Fish and Wildlife Service take the lead to determine if a formalized agreement could be developed with Lake Powell National Golf Course for the purpose of rearing endangered fish. If such an agreement could be developed, other agencies, such as FWS, Utah Department of Natural Resources, Arizona Game and Fish Department, and the Navaho Nation may also be interested in participating. 11