PERCENTAGE OF TOTAL RUN 



rv) 

 O 



~r~ 



o 



> 



r 



> 



-< 



c_ 

 c 

 z 

 m 



c 

 r 



-< 



> 



c 

 o 



c 

 Cn 

 H 



Figure 5. - -Weekly total catch of sea lampreys in streams under control in 

 Lake Superior and Lake Michigan, 1954. 



19 



