CONTENTS 



Rge 



Introduction 1 



Description of backwater areas 2 



Miller Lake 2 



Areas A and B 2 



Methods and materials 5 



Toxicant application 5 



Fish collection 5 



Weight and species composition of the fish populations 6 



Reliability of estimates 6 



Standing crops 9 



Miller Lake , • • ■ 9 



Area A 16 



Area B 16 



Fluctuations in standing crops of area B 16 



Ifercentage composition 16 



Weight per acre 16 



Comparison with other waters 20 



Mississippi River backwaters 20 



Inland waters of adjacent States 20 



Size and age-group composition of population in area B, 1948-1949 21 



Size and age structure 21 



Predators 21 



Bowfins 21 



Shortnose gar 21 



Longnose gar 21 



Game fish 21 



Largemouth bass 21 



Northern pike 21 



Sauger 26 



Walleye 26 



Panfish 26 



Bluegill 26 



Black crappie 26 



White crappie 27 



White bass 27 



Yellow perch 28 



Catfish 28 



Channel catfish 28 



Flathead catfish 28 



Black bullhead 30 



Forage fish 30 



Gizzard shad 30 



Rough fish 30 



Carp 30 



Spotted sucker 30 



Freshwater drum 30 



Northern river carpsucker 30 



iii 



