ABSTRACT 



Data on the age composition of red salmon caught by the 

 Japanese high-seas salmon fleets indicates the dominance of 

 2-year-in-ocean reds in the even years and 3-year- in-ocean 

 reds in the odd years. 



The majority of the 3-year-in-ocean reds are sexually 

 mature. Some of the 2-year-in-ocean red salmon are mature 

 fish but the proportion of mature and immature cannot be 

 assigned at this time. More than 75 percent of the 1957 

 catch of red salmon were mature fish. 



The majority of the 5 -year-old chum sal mon are sexually 

 mature, while the U-year-olds represent both immature and 

 mature fish. In 1955 the majority of the chum salmon taken 

 by this fishery were k years old; a significant number were 

 Immature. In 1956 the majority of the chum salmon were 5 

 years old and mostly mature. 



The pink salmon available to the f ishe ry were all mature 

 fish. 



