seas and, subsequently to determine whether the blood was 

 from Asian or North American fish, although the fish may 

 have been taken thousands of miles from its point of origin. 



To siommarize briefly the results and progress at this 

 point, we have worked out, for the years during which 

 research has been possible, a picture of the distribution of 

 North American red, pink, and chum salmon on the high 

 seas. 



For red salmon it has been found that Bristol Bay fish 

 are dominant in the Aleutian area as far west as 175° E. 

 longitude; that is, a matter of about three-fourths of the 

 distance from Bristol Bay to Kamchatka (fig, 3). Asian fish 

 in smadler numbers are found as far east as the eastern 

 Aleutian Islands, 



Figure 3.- -Distribution of western Alaska red salmon in 1957. In the shaded areas, western 

 Alaska-type red salmon were dominant, and their relative abundance was proportional 

 to the depth of the shading. 



Pink sailmon from the Bering Sea coast of North America 

 were found very nearly as far west as Bristol Bay red 

 salmon; however, not nearly so abundantly. Conversely, 

 Asian pink salmon in 1957, and apparently also in 1959i were 

 found as far east as the tip of the Alaska Peninsula in very 

 considerable numbers. It seems that in these odd-numbered 

 years Kamchatka fish overwhelmingly dominated the entire 

 mid-Aleutian pink salmon population, 



Chxim salmon were distributed in approximately the same 

 manner as pink salmon. Asian chums have been caught near 

 the Shumagin Islands, and North American chums, while they 

 go far to the west, do not appear actually to reach the Asian 

 mainland. Again, the numbers of Asian chum Scdmon in 

 mid-ocean appear to far outnumber those from North America. 



22 



