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220 



200 - 

 180 - 



(60 





140 



120 



V. 100 



:| 80 



60 



T 1 1 1 r 



1949 



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_l I I I I L. 



100 120 140 160 180 200 220 240 260 280 300 320 340 

 Length in Millimeters 



100 120 140 160 180 200 220 240 260 280 300 320 340 



Length in Millimeters 

 Figure 11. - Length frequency of downstream -migrant bluebacks at Bonneville Dam, 



1949-50. 



19 



