SEAWARD MIGRATION OF CHINOOK SALMON. 



6i 



19 

 (8 



(7 

 16 

 15 

 14 

 J3 

 12 



n 



10 

 3 

 8 

 7 

 6 

 5 

 4 

 3 

 Z 



Mch. Apr. May June Julij A\i3. Sept. Oct. Nov. Dec. Jan. Feb. Mch. 



YeQr\inq3. 



Gr.\ph 8.— Sacramento River; Rate of growth, increase in number of rings on scales, and 

 increase in length of anterior radii of scales. Significance of curves is same as in graph 4, with 

 the following exceptions: Solid line indicates the generalized curve of length developed on 

 graph 3. Broken line indicates number of rings on scales— i, to beginning of new growth; 3, 

 total for specimens not showing new growth; and 3. total for specimens showing new growth. 

 Dotted line indicates length of anterior radii— i, to beginning of new growth; 3, total for speci- 

 mens not showing new growth; and 3. total fur specimens showing new growth. A indicates 

 collections from lower part of river; B, McCloud River, 1909; and C, JlcCloud River, 1911-19. 



75412°— 22 5 



