1990-1991 Annual Progress Report 

 Long-Term Illinois River Fish Population Monitoring Program 



Richard E. Sparks and K. Douglas Blodgett 



Illinois Natural History Survey 



River Research Laboratory of the Forbes Biological Station 



Post Office Box 599 



Havana, Illinois 62644 



30 May 1991 



R.E. Sparks, Principjfl Investigator K.D. BlWgett, 



Co- Wyestigator 

 Center for Aquatic Ecology Center for Aquatic Ecology 



Illinois Natural History Survey Illinois Natural History Survey 



■DavTd P. Phiiipp, Director 

 Center for Aquatic Ecology 

 Illinois Natural History Survey 



