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SPAWNING Adult razorback suckers (Xyrauchen texanus) were again captured, via electroshocking, in the vicinity of the area known as Razorback Bar on the Green River (RMI 311.0), 25 April through 31 May, 1988. A total of 7 ripe females, 33 ripe males, and 3 fish whose sex was not determined, were captured during these operations (Table 1.). Also, during the operations, eight fish were recaptured at least one time. Since it was determined that the hormone injections used in 1987 were not very successful, fish were stripped in the field at the location of capture. After stripping all fish were released alive. The fertilized eggs were transported to Ouray NWR hatchery and inserted into incubators. Eggs and milt were manually stripped into a dry, flat-bottomed pan, which was cooled to river water temperature. The sex products were lightly stirred with a goose feather for even distribution and to break up egg clusters. One inch of river water was inserted into the pan, the sex products again lightly stirred, and let stand for a period of five minutes to activate the sperm. After five minutes, one cup of clay (bentonite) at river temperature was stirred into the pan to coat the eggs and prevent further egg adhesion. A second inch of river water was added to the pan, the contents again stirred, and let stand for an additional five minutes. The egg mixture was then poured into aquarium nets and washed clean of the clay mixture. The eggs were then placed in a cooler filled with river water and transported to Ouray NWR hatchery. The eggs water hardened at least one hour during transit to the hatchery. Before being placed into an incubator tray, the eggs were disinfected in a solution of 10% Betadyne for a period of 10 minutes to