SEAWARD MIGRATION OP CHINOOK SALMON. 



6i 



19 



18 



n 

 u 

 ;5 



(4 



;3 

 11 



10 

 9 

 8 

 7 

 6 

 5 

 4 

 3 

 Z 

 J 



Mch. Apr. May June Juljj Aug. Sept. Oct. Nov. Dec. Jan. Feb. Mch. 



Graph 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 deveIof>ed on 

 graph 3. Broken Une indicates number of rings on scales— r, to beginning of new growth; 2, 

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

 Dotted Une indicates length of anterior radii— i, to beginning of new growth; 2, total for speci- 

 mens not showing new growtli; and 3, toUl for specimens showing new growth. A indicates 

 coUections from lower part of river; B, McCloud River, 1909; and C. McOoud River, 1911-U. 



75412°— 22 5 



