-7^ 

 ILLINOIS 

 ^ NATURAL HISTORY — ^ 



SURVEY 



Long-Term Illinois River Fish Population 

 Monitoring Program 



Annual Report, F-101-R2 



Center for Aquatic Ecology 



Richard E. Sparks and K. Douglas Blodgett 



30 May 1991 

 V 



Aquatic Ecology Technical Report 91/10 



