Migration of the immature fish 73 



Analysis of migrations 74 



Temperature 77 



Light 80 



Oxygen 82 



Food j 82 



Protection 84 



Reaction to objects 85 



Hydrogen ion concentration and movement 85 



Hydrogen ion concentration of the blood 90 



The adult fish 91 



Summary of results on Labidesthes 92 



The Cisco, LeiKichlhys artedi (Le Sueur) 94 



Introduction and discussion 94 



Methods of investigation 96 



Breeding habits 96 



Development 97 



The young 101 



Growth 102 



Food habits 103 



Migrations 105 



Behavior 107 



Conservation 109 



Summary 110 



Bibliography 112 



Index 149 



