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~.. 3 ,, tank. A regular screen was covered with saran material to retain the fry in the tank. A 3 to 6 gpm flow of 62±1oF ti~ell water was maintained through the test. A trout starter diet was offered at least four times daily. Food was administered with ajar with holes in the lid to alleviate excessive over- ~ feeding. All the water surface of the tank was covered with feed at each feeding. The tank was cleaned in the same manner as in the first test. The fish were moved to a rearing pond after 17 days on feed. The rear- ing pond had developed a zooplankton bloom that would support the fry at the time of stocking. RESULTS AND DISCUSSION Pond Spawning The temperature of the two ponds that received brood razorback suckers ranged from 44 to 61 for the first 68 days that the fish were stocked. The temperatures were in-the 50's for all but about eight days during the early part of this period. Spawning activity was noted the 12th day after the fish were stocked in the pond. There were three sweat areas in CS and five areas in pond C6. The areas that were cleaned were from 2 to 3 feet in diameter. Fish were ._ ---- observed over these and other cleaned areas on several occasions. Obser- vations from a boat with an underwater viewer confirmed that nest areas were being prepared. On three occasions eggs were observed on the rocks in the two ponds. The difficulty of see in g the almost transparent eggs made i any estimation of numbers impossible. Another observation of a few fungused eggs adhered to racks in pond C6 gave evidence that spawning had taken place at least a total of four occasions in the two ponds. The ponds developed a phytoplankton Uloom that limited clear observa- tions for the last 30 days of the spawning period. It appeared that rock 5