It can be seen that in nearly every area and for nearly every species , 

 a very high percentage of the fish were traveling in an easterly direcion. 

 The two exceptions were the pink salmon and the chum salmon taken between 

 the Pribilof Islands and Munivak Islando Very few pinks viere examined and 

 the percentage figure probably is of little significanceo However, a fair 

 sample of chum salmon was examined and it v;as found that about one-half the 

 fish were traveling easterly and one-half westerlyo 



Stating the directicn of travel as easterly or westerly does not 

 imply that the fish were traveling due east or due westo A fish traveling 

 in a direction slightly east of north or east of south, that entered the 

 net from the west side^ would be recorded as traveling easterly, whereas it 

 should more properly be considered as traveling northerly or southerly. 

 The same thing is true of a fish that entered the net from the east sidej 

 i.e^j the fish vfould be recorded as traveling westerly, wherfeas it m:ght 

 have been traveling southwesterly, westerly or northwesterly. 



Thus it is very probable that many of the shun salmon which were 

 recorded as travelj-ng westerly (and also to some extent those which v/ere 

 found to be traveling easterly) were actually traveling in a northerly di- 

 rection enroute to the Yukon River or to other salmon streams to the north- 

 wardo A part of the fish probably were not actively migrating and hence 

 might have been moving at random in search of foodo Despite the apparent 

 random movements of some of the fish, it is apparent that the general move- 

 ment of the red salracrij in the areas fished, was in an easterly direction 

 regardless of how far offshore the fish were taken . 



It has been commonly assumed that all of the Bristol Bay salmon mi- 

 grate through Unimak Pass and spend the greater part of their ocean resi- 

 dence in the Viraters south of the Alaska Peninsula, and that on their 

 spawning migrations they come in from the ocean to the spawning grounds via 

 Unimak Pass, The catching of salmon between the Islands of Four Mountains 

 and the Pribilofs indicates that some of the salmon undoubtedly enter Bering 

 Sea through passes to the westward of Unimak. It likevfise seems probable 

 that many of the Bristol Bay salmon never leave Bering Sea at all but remain 

 north of the Alaska Peninsula throughout their ocean residence. 



Summary of 19hO operations 



lo During the course of the 19U0 operations salmon could be caught 

 in all areas fished in Bering Seao 



2o The most westerly section line fished vras between the Islands of 

 Four Mountains and the Pribilof Islands, slightly over U50 miles from the 

 nearest Bristol Bay river o 



3o Three of the four localities fished between the Islands of Four 

 Mountains and the Pribilofs were beyond the continental shelf, the depth 

 of vrater ranging up to 1,600 fathomSo The salmon were caught, however, in 



20 



