JUNE 



I65°W. I60°W, I55°W. I50°w I45°W. I40°W. ISS'W. 



.X-NO PINK SALMON CAUGHT 

 • -PINK SALMON CAUGHT, BUT NO 



BE. ALASKA RETURNS 

 .O-B.C.-SE. ALASKA TAG RETURNS 



JULY . 



BC 



-><=' 



160°W, I55°W I50°W. I45°W. I40°W. 



Figure 6. — Spring-summer distribution of southeastern Alaska-British Columbia pink salmon in the Gulf of Alaska 

 in 1962 as shown by longline and purse seine catches and by tag returns (source: Canadian and U.S. data. Inter- 

 national North Pacific Fisheries Commission Annual Reix>rt, 1962). 



relatively brief and occurs principally in July 

 ( Kaganovskii, 1919) . The fry probably migrate to 

 sea in June, but data are lacking. 



If the East Kamchatkan pink salmon respond 

 to ocean currents as do the southeastern Alaska- 

 British Columbia stocks, then they may be 

 expected to follow the East Kamcliatka Current 

 southwestward along the coast and then to migrate 

 eastward with the Subarctic Current and the West- 

 wind Drift ( fig. 1 ) . Their presence in the western 

 Gulf of Alaska (near lat. 50° N. and long. 155° to 

 160° W.) in May and June has been demonstrated 

 by tag returns (Fisheries Research Board of Can- 

 ada, 1963; Hartt and Dell, 1964). Their presence 

 south of the entire Aleutian chain from late May 



through early July and in the Bering Sea in June 

 and July has also been well demonstrated by 

 Japanese and United States tagging (Hartt, 1962; 

 Kondo et al., 1965). Purse seining by the United 

 States has further shown that they move \ery rap- 

 idly in a westward direction south of the Aleutian 

 Islands, northward through the major passes, and 

 northwestward in the Bering Sea. Passage south of 

 the central Aleutians jjeaks sharply about June 5 

 to 30. 



The rate of travel to the Karaginski district 

 from the central Aleutians (about 800 miles or 

 1,482 km.) averages about 25 to 30 miles (46.3-55.6 

 km.) per day for the last 30 to 45 days at sea 

 (Hartt, 1906). Thus, the migration is more 



MODELS OF OCEANIC MIGRATIONS OF PACIFIC SALMON 



447 



