iii 



Acknowledgements 



This was a cooperative project of the Outboard Boating Club of America, 

 the Oklahoma Game and Fish Department, and the Sport Fishing Institute. The 

 need for such a study was first expressed by the Sport Fishing Institute. 

 Initial impetus was provided by a grant of SlO,OOOoOO from the Outboard 

 Boating Cliib and its spxDnsoring boat and motor industries. Acting as interme- 

 diary, the Sport Fishing Institute gained the cooperation of the Oklahoma 

 Game and Fish Department, which agreed to contribute additional financial 

 support and to supervise the investigation. The author was placed in the 

 employ of the Fisheries Division, Oklahoma Game and Fish Department, with 

 the Spor.t Fishing Institute continuing in an advisory capacity. 



For their generous cooperation, particular thanks are due to E. M. 

 Leonard and Gordon E. Hall, both former Directors, and to John E. King, 

 present Director of the Fisheries Division, Oklahoma Game and Fish Depart- 

 ment; to Robert M. Jenkins, Director, and associates Joe Finnell and Ronald 

 Elkin of the Oklahoma Fisheries Research Laboratory; to H. C. Clemens and 

 Carl D, Riggs of the University of Oklahoma; to Robert E. Hunter and W. H. 

 Thompson, of the Corps of Engineers, Tulsa District; to J» v;. Costilow and 

 Sam W, Jackson, Jr., of the City of Tulsa, with special thanks to the latter 

 for use of unpublished data from Upper Spavinaw Reservoir; to Oo E. Orr for 

 use of unpxiblished Heyburn Reservoir data; to Glenn Jones, A. W. Hill and 

 Farrell Copelin for assistance in the field. Finally, special recognition 

 is due Frank J. Claffey for use of unpublished plankton and light penetration 

 data, and to W. H. Irwin, of Oklahoma A. and M. College, for his many highly 

 valued contributions to the study. 



