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Results More than three million razorback sucker were stocked at fifteen localities in the Gila River drainage, Arizona in 1985 (Table 1, Fig. 1). Most (86.5%) were fry transplanted in the Salt River drainage (Table 2). Prior to 1985, recapture of stocked razorback sucker was limited to two collections (Table 3). However, in 1985 several recaptures were made including two large suckers from the Gila and Verde (unverified) rivers, respectively. Stocked razorback sucker growth was evident with subfingerlings more than doubling in size and fingerlings in Bonita Creek about 25% larger at time of capture (Table 3). Uf note is the disparity in growth between groups of razorback sucker fingerlings planted in three isolated backwaters on Bonita Creek (Table 4). Stocked suckers grew best in the backwater where other catostomids were absent from seine collections. Mainstem river sampling, including Eagle Creek (similarity in collecting methods), failed to collect any razorback sucker other than those during post-stocking dispersal and predation studies on the Gila River (Table 5). The Salt River was not sampled by electrofishing or netting due to equipment failure during annual survey efforts. Data from the Verde River are interesting in that despite the presence. of numerous introduced fish species, native fishes still comprised nearly 38% of combined collections. , -5-