ACKNOWLEDGEMENTS 



The electrof ishing survey of the Illinois Rivev was conceived in 

 1957 and wad carried out, for the most part, by Dr. William C. Starrett, 

 Aquatic Biologist, Havana Field Laboratory, Illinois Natural History 

 Survey. Mr. Dennis L. Dooley worked on the electrof ishing survey and 

 other Illinois River studies, for 11 years. Following Dr. Starrett 's 

 death in December 1971, the electrof ishing survey was resumed in 1973 

 by the writer and Mr. Kenneth Walker, with assistance in locating sta- 

 tions and information on previously established methods from Mr. Dooley. 

 Mr. Carl M. Thompson assisted with the 1974 electrof ishing and helped 

 compile and analyze data for this report. Miss Judith L. Breckenridge 

 did the typing. We are grateful to all the students and other assistants 

 who helped with the program from 1959 to 1974. Finally, the electro- 

 fishing survey could not have been continued in 1974 without the support 

 of the U. S. Army Corps of Engineers, St. Louis District, and the 

 Waterways Experiment Station, Vicksburg, Mississippi. Special thanks 

 for advice and editing are due to the project supervisors from the 

 Waterways Experiment Station, Mr. R. Charles Solomon and Mr. Billy K. 

 Colbert. 



