If Tuttle Creek Reservoir follows the pattern found in most Oklahoma reservoirs, large populations of "coarse fish"--fishes that are, however, commercially desirable--will develop (Finnell, _et al._, _loc. cit._). To utilize this resource, and possibly to help control "coarse fish" populations for the betterment of sport-fishing, some provision for commercial harvest should be made in the reservoir. SUMMARY 1. The Big Blue River Basin in northeastern Kansas was studied between March 30, 1957, and August 9, 1958. The objectives were to record the species of fish present and their relative abundance in the stream, and to obtain a measure of angling success prior to closure of Tuttle Creek Dam. 2. Fifty-nine stations were sampled one or more times, using seines, hoop and fyke nets, wire traps, experimental gill nets, rotenone, and an electric fish shocker. 3. Forty-eight species of fish were obtained, and five others have been recorded in literature or found in museums. One species, _Carpiodes forbesi_, is recorded from Kansas for the first time. 4. _Notropis lutrensis_ was the most abundant fish in the Big Blue River Basin, followed by _Notropis deliciosus_ and _Ictalurus punctatus_. The most abundant sport-fishes were _I. punctatus_, _I. melas_, and _Pylodictis olivaris_, respectively. 5. The spawning behavior of _Notropis lutrensis_ is described. 6. A creel census at major points of access to the Big Blue River, was taken in 1957 (below Tuttle Creek Dam) and in 1958 (above, in, and below the dam-site). Fishing pressure averaged one fisherman per 15.7 miles of shoreline. The average length of the fisherman-day averaged 2.2 hours, with an average of 0.33 fish per fisherman-day being caught in 1958. The average number of fish per man-hour in 1958 was 0.14 and 15.8 per cent of the fishermen were successful. Distances traveled in order to fish ranged from 0 to 197 miles (airline) and averaged 15.7 miles. 7. The primary recommendation is that studies be continued, to document changes that result from impoundment. Because brood-stock of the major sport-fishes is already present, stocking is unnecessary, except for walleye and northern pike. Also, I recommend commercial harvest of non-game food-fishes. LITERATURE CITED BAILEY, R. M. 1956. A revised list of fishes of Iowa, with keys for identification. _In_ Iowa Fish and Fishing, by J. R. Harlan and E. B. Speaker. Iowa State Cons. Comm., Des Moines, pp. 325-377. ----, and CROSS, F. B. 1954. River sturgeons of the American genus _Scaphirhynchus_: characters, distribution, and synonymy. Pap. Michigan Acad. Sci., Arts, and Letters, 39 (1953): 169-208. BREUKELMAN, J. 1940. A collection of Kansas fish in the State University Museum. Trans. Kansas Acad. Sci., 43: 377-384. BUCHHOLZ, M. 1957. Age and growth of river carpsucker in Des Moines River, Iowa. Proc. Iowa Acad. Sci., 64: 589-600.