GRAYLING OF GREBE LAKE 



321 



50 



- 55 



Temperature o— — o 



Hybrid trout • • 



Grayling  • 





I 



b 



to 



o 



1,550 



1,250 



950 



650 



350 



50 



Temperature o c 



Hybrid trout • • 



Grayling • • 



—I— 

 28 



to 



55 



150 | 



45 



uo 



t 



I 



3 

 July 



Figure 11. — Migration of hybrid trout and grayling into stream traps, and surface water temperatures (6-ft. depth in 

 1953, and 1 ft. deep in 1954) in Grebe Lake streams, 1953, 1954. Numbers of fish include only those moving to 

 spawning grounds. 



