LIST OF TABLES 



Table Page 



1 Comparison of Phytoplankton Populations in the Main 

 Channel of the Illinois River in 1898 and 1974 12 



2 Comparison of Zooplankton Populations in the Main 

 Channel of the Illinois River in 1898 and 1974 19 



3 Average Density of Benthic Organisms in River Border 

 and Side Channel Habitats Along the Lower 80 Miles of 



the Illinois River in 1915, 1964, 1974, and 1975 22 



4 Average Density of Benthic Organisms in the Main 

 Channel of the Lower 80 Miles of the Illinois River 



in 1915 and 1974 24 



5 Weight and Value of the Mussel Catch from the 



Illinois River, 1908-1970 35 



6 Kinds of Mussels Taken Alive from the Illinois River 

 in the Vicinity of Meredosia in 1912, 1930, 



1955, and 1966 37 



7 . Weight and Value of the Mussel Catch, Mississippi 



River and Associated Waters, 1894-1972 47 



8 Mussel Species Reported from Mississippi River in 



1906, 1931, and 1975-76 50 



9 Summary of the Commercial Catch of Fish from the 

 Illinois River and the Mississippi River Bordering 

 Illinois, and the Number of Full-Time Fishermen, 

 1950-1974 57 



10 Calculated Wholesale (Undressed) Prices Paid to 

 Illinois River Commercial Fishermen for Catches of 

 Carp, Buffalo, Channel Catfish, and Freshwater Drum 

 in 1894, 1899, 1922, 1931, 1950, 1955, 1960, 1965, 



and 1970 53 



11 Yearly Total and 5-Year Average Harvest of Carp, 

 Buffalo, Channel Catfish, Freshwater Drum, and All 

 Commercial Soecies from Alton Pool, Illinois River, 

 1950-1970 63 



iv 



