106 U. S. BUREAU OF FISHERIES 



tures of troll-taken salmon numbered 38, of which 22 were taken 

 entering the Columbia River, thus again showing the great distance 

 traveled by king salmon. Full particulars of the tagging experiment 

 will be published in a separate document. 



In addition to the salmon-tagging operations in southeastern 

 Alaska, 700 red salmon were tagged on August 19 and 20 at the 

 Broken Point trap of the San Juan Fishing & Packing Co. at Uganik 

 Bay by Dr. Willis H. Rich in connection with his studies of the Karluk 

 salmon. Of these tagged fish, 86 were counted ascending through the 



Fig. 5.— Salmon ascending Alaska stream 



weir at Karluk between August 27 and September 20 and 317 others 

 were reported recaptured. Complete data on the experiment will be 

 found in a publication concerning the Karluk investigation. 



SALMON LIFE-HISTORY STUDIES 



Further investigations in connection with hfe-history studies of the 

 Pacific salmons, particularly the red salmon, were conducted in 1927 

 by Dr. C. H. Gilbert, of Stanford University, Calif., and Dr. Willis H. 

 Rich, chief investigator of salmon fisheries, assisted by Seymour P. 

 Smith. This work centered in the Karluk region and in addition to 

 important salmon migration studies included collections of scales of 

 red salmon, an examination of the stomach contents of all species 

 except kings, and collections of a number of small migrating salmon. 

 Report of the investigations is published in a separate document. 



OBSERVATIONS ON THE ESCAPEMENT OF SALMON 



To comply with the intent of Congress, as expressed in the act of 

 June 6, 1924, that not less than 50 per cent of the salmon be allowed 

 to escape to the spawning grounds, careful observations of the escape- 



