1950 



10 

 10 

 10 

 10 

 10 

 10 

 10 



20 



10 

 10 

 10 

 10 

 <2 80 



k 





60 

 40 

 20 



< 160 



-Q 140 



I 120 



^ 100 



80 



60 



40 



20 



80 

 60 

 40 

 20 



40- 

 20- 



10 



10 



H ' I ' I ' I I I I I I I I I ' I 'I 'M I ' I ' 1 I I M ' I 



V ' I ' I ' I I I ' I ' I ' I ' I ' I ' I ' I ' I ' I ' I ' I ' I 



No Somple 



No Sample 



- ^- - a 



3 



Week No. 



^^-3 10 



4 10 



5-6 



7 '0 



8 



9 10 



1 10 



!l 10 



12 



^^3 10 



iSx 



^r^ _i 



T- II 



jf2 



JL. 



J4 '0 

 15 



^^6 



17 



_ij8 



19 



20 



21 



_22 



^3 



No Sample 



No Sample 



No Sample 



No Sample 



No Sample 



No Sample 



_25 



_26 



_27 



_28^2 



_33 



_34-36 



_37 



.38 



_39 



.40 



_42-48 



_49 



_50-52 



^ I ■ I . 1-^— t-i r . I . r 1 ■ I ■ I ■ I . ■ . I ■ I C.^ l.^ ■ ■ ■ ■ 1 . I . I . I 



40 80 120 160 200 240 280 320 40 80 120 160 200 240 280 320 



' t . 1 . 1 . I 



Length in Millimeters 



Figure 14. - Lengrn frequency of downstream -migrant bluebacks in weekly 

 samples, 1950. 



22 



