Pink salmon are caught in large' numbers 

 in all years. However, according to the 

 conclusions of some Japanese biologists, in 

 the Urakawa area off the southern coast of 

 Hokkaido, pinks are abundant only in even 

 years. 



Chum salmon rank next to pink salmon 

 in total numbers Izinded. Chums are present 

 in greatest numbers during the early part 

 of the fishing season, especially in the 

 area east of 155° £. longitude and between 

 42** N. and 45" N. latitude. After June the 

 percentage of chums caught in Area A drops 

 off and they constitute less than 10 per- 

 cent of the total catch in July. 



Red salmon are caught during April and 

 May in the areas far offshore, mainly east 

 of 155" E. longitude in the vicinity of 44* 

 N. latitude. At this time, they make up as 



much as 50 percent of the total catch in 

 the vicinity of 165° E. longitude. In June 

 the red salmon disappear from the fishery, 

 few being caught. In July 2ind August prac- 

 tically none are caught. 



Silver salmon appear in the fishery 

 from mid-July in Area A, gradually increas- 

 ing in numbers in early August. In August 

 silvers are second to pinks in landings in 

 some areas but the total catch of this 

 species for the entire season is not large. 



King salmon appear in the fishery 

 throughout the fishing season but in very 

 small numbers. For each set, an average of 

 one or two kings is estimated to be caught. 



Masu salmon (O. masu ), a species in- 

 digenous only to Asian waters, is caught in 

 very small numbers. This species is not 



I TO" 



50° 



45° 



40° 



145° 150° ISS" 160° 



Figure 3. --Average catch composition by area and time, 1957-58. 



170° 



