Table 



21 Channel Catfish ( Ictalurus punctatus ) Taken by 

 Electrofishing 



22 Flathead Catfish ( Pylodictis olivaris ) Taken by 

 Electrofishing 



23 White Bass ( Roccus chrysops ) Taken by 

 Electrofishing 



24 Green Sunf ish ( Lepomis cyanellus ) Taken by 

 Electrofishing 



25 Bluegill ( Lepomis macrochirus ) Taken by 

 Electrofishing 



26 Largemouth Bass ( Micropterus salmoides ) Taken by 

 Electrofishing 



27 White Crappie (Pomoxis annularis ) Taken by 

 Electrofishing 



28 Black Crappie ( Pomoxis nigromaculatus ) Taken by 

 Electrofishing 



29 Freshwater Drum ( Aplodinotus grunniens ) Taken by 

 Electrofishing 



30 Average Number of Fish (Including Adult and Young) 

 Taken Per 30 Minutes of Electrofishing, by Year, 

 in Each Navigation Pool of the Illinois River, 

 1959-1974 



31 Average Pounds of Fish (Adult Only) Taken Per 

 30 Minutes of Electrofishing, by Year, in Each 

 Navigation Pool of the Illinois River, 1959-1974 



32 Average Number of Fish of Selected Species Taken 

 Per 30 Minutes of Electrofishing on the Illinois 

 River, 1959-1974 



33 Average Number of Fish, by Species, Taken Per 

 30 Minutes of Electrofishing in Each Navigation 

 Pool of the Illinois River, 1959-1974 



34 Average Number of Pounds of Fish, by Species, Taken 

 Per 30 Minutes of Electrofishing in Each Navigation 

 Pool of the Illinois River, 1959-1974 



35 Summary of the Commercial Catch of Fish from the 

 Illinois River and the Mississippi River Bordering 

 Illinois, and the Number of Illinois River Fishermen, 

 1959-1974 



36 Organochlorine Insecticide and Mercury Levels in Fish 

 from the Illinois River 



