changes can be attributed to the canalization of the river and increased 

 pollution load. Although the pollution load has been decreased in recent 

 years by the installation and operation of wastewater control facilities, 

 the lake-like setting of the Ohio River continues to influence the kinds 

 and numbers of fish in the river, as evidenced by the chemical fishing 

 studies performed in the lock chambers. Although many of the so-called 

 sport and commercial species have returned to the river, the fish species 

 desiring a lake-like setting continue to dominate the population. 



REFERENCES 



Clay, W.M. 1962. A field manual of Kentucky fishes. Kentucky Dep. Wildl. 

 Res., Frankfort, Ky. 



Krumholz, L.A. 1950. Some practical considerations in the use of rotenone 

 in fisheries research. J. Wildl. Manag. 



Ohio River Valley Water Sanitation Commission. 1962. Aquatic life re- 

 sources of the Ohio River. Cincinnati, Ohio. 



Post, G. 1958. Time vs. water temperature in rotenone dissipation. Proc. 

 38th Annu. Conf. Game Fish Comrn. 



Trautman, M.B. 1957. The fishes of Ohio. Ohio State Univ. Press, 

 Columbus, Ohio. 



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