FORTIETH BIENNIAL REPORT 



31 



Figure 12. Tagging a salmon. One man holds the fish in the V-shaped padded trough. 

 The other applies a pair of tags. Tlie tags are plastic discs, held in place by a pin or 

 wire which passes through the flesh at the base of the dorsal fln. Tagging at sea, in the 

 delta region, and in the streams gives measures of the sizes of the runs and the impor- 

 tance of the various rivers, movements in the ocean, and the time that runs bound for 

 different streams pass through the Ashing grounds. (Photograph by D. H. Fry, Jr., 

 Stanislaus River near Oakdale, November, 19^7) 



