Alaska, north of lat. 55°N, suggesting that at least a 

 portion of these runs are located well to the north in 

 spring and summer prior to their inshore migration. 



High-Seas Recoveries in Year Tagged 



Okhotsk Sea and Bering Sea. — The few recoveries 

 in the Okhotsk Sea were mainly from an area 

 southeast of Kamchatka, but one was from near the 

 eastern Aleutian Islands. Recoveries in the Bering Sea 

 were from fish tagged over extensive areas of the ocean 

 (Fig. 59). Most returns were from waters off the Aleu- 

 tian Islands, an area of intensive tagging effort. 

 Recoveries were also quite abundant from south of the 

 Alaska Peninsula and from the western Bering Sea. 

 Areas from which returns were notably lacking were 

 the western North Pacific Ocean and the eastern Ber- 

 ing Sea. The pattern of tagging locations for these 

 recoveries is similar to those of some Asian stocks of 

 maturing fish shown earlier, and the Bering Sea 

 recoveries may primarily represent fish intercepted on 

 their migration to these same areas such as the Bering 

 Sea coast of the USSR and Hokkaido. 



Western North Pacific. — Recoveries by the 

 mothership and land-based fisheries in the western 

 North Pacific Ocean (Fig. 60) came from rather 

 limited areas. Very few returns came from east of the 

 central Aleutians or the Bering Sea, and most were 

 concentrated from waters off the central Aleutians 

 west to Hokkaido and the Kurile Islands. This dis- 

 tribution corresponds to the ocean distribution of 

 maturing chum salmon originating from the western 

 and northern coasts of the Okhotsk Sea. 



Central and western North Pacific. — Recoveries 

 in these waters largely came from within this area 

 although some also came from as far east as the cen- 

 tral Gulf of Alaska (Fig. 61). Recoveries from the Ber- 

 ing Sea and from the western North Pacific were 

 almost nil. 



Recoveries in Years Subsequent to Tagging 



Asian recoveries (Figs. 62-65). — A distinctive 

 feature of the recoveries in Asia was the recognizable 

 similarities between the general distribution of stocks 

 of immatures and the distribution of the same stocks 

 of maturing fish. Immatures from the Islands of Japan 

 and from land areas adjoining the Okhotsk Sea (Figs. 

 62-64) were found mainly off the Aleutian Islands but 

 were also found in the western North Pacific Ocean 

 and to a limited degree in the eastern North Pacific 

 and Bering Sea, as were maturing chum salmon 

 originating from these coastal areas. Immatures from 

 eastern Kamchatka and the Bering Sea coast of the 



USSR were restricted to near the Aleutian Islands 

 and the Bering Sea, a pattern of distribution resem- 

 bling that of maturing chum salmon from this region 

 (Fig. 65). Contrasting with the distribution of matur- 

 ing fish from Asia was the lack of Asian immatures 

 from as far east as the eastern North Pacific. 



North American recoveries (Figs. 66, 67). — As in 



the case of Asian chum salmon, the distribution of 

 stocks of immature chum salmon from the Bering Sea 

 coast of Alaska paralleled in general the distribution 

 of maturing fish from this area, being found 

 throughout the eastern North Pacific Ocean and 

 waters off the Aleutian Islands (Fig. 66). The im- 

 matures from the Pacific Ocean coast of Alaska, 

 however, had a dissimilar distribution to that of 

 maturing fish from this area, having a more westerly 

 distribution extending mainly from south of Kodiak 

 Island to the central Aleutian Islands (Figs. 66, 67). 

 This conclusion is based on relatively few recoveries 

 which may not truly reflect the actual distribution of 

 immatures from this region. Only four recoveries have 

 been made from the coasts of British Columbia and 

 Washington; these came from the Gulf of Alaska 

 north of lat. 55 °N and off the coast of British Colum- 

 bia (Fig. 67). 



High-Seas Recoveries in Years 

 Subsequent to Tagging 



Immatures recovered in the Bering Sea by the 

 Japanese mothership fishery a year or more after tag- 

 ging came mainly from near the Aleutian Islands, 

 with a few from the eastern North Pacific Ocean and 

 Bering Sea (Fig. 68). One fish was recovered in the 

 Sea of Japan from the Aleutain area. These locations 

 were similar to the pattern of tagging locations for 

 maturing fish that were also subsequently taken in 

 the Bering Sea and may indicate that both maturity 

 groups were of the same stocks. 



The immatures recaptured offshore by the 

 Japanese fisheries in the western North Pacific came 

 from waters off the Aleutian Islands and from the 

 western Pacific Ocean and western Bering Sea (Fig. 

 69). This distribution was similar to that of maturing 

 fish recaptured at sea in the western Pacific. 



Immatures captured a year or more after tagging in 

 offshore waters south of the central and western Aleu- 

 tian Islands came mainly from within this area or 

 directly north of this area in the Bering Sea (Fig. 70). 

 These tagging locations probably illustrate the ocean 

 areas occupied by many Asian stocks of immatures 

 during summer months. Two fish, not illustrated, 

 were recovered in areas 35-36 (near long. 167°W and 

 150°W) which had been tagged the previous year 

 south of Adak Island. 



30 



