gizzard shad 



1998 



lower river middle river upper river 



Figure 2. Catch per hour of gizzard shad from 1 994 through 1 998 in the lower (Alton 

 Reach), middle (La Grange and Peoria reaches), and upper (Starved Rock, Marseilles, 

 and Dresden reaches) Illinois River watenway. 



27 



