ABSTRACT 



The relation between mideye-fork length and number of eggs for red salmon at Brooks 

 Lake (1957-58) and Karluk Lake (1958) is established. A review of available literature 

 on fecundity at Karluk Lake indicates that there may have been a long-term decrease 

 in the size of females and correspondingly in the average number of eggs per female. 



Annual variations in age composition by life-history categories and in sex ratios 

 affect the number of eggs available for deixtsition. Analyses of Karluk Lake red salmon 

 stocks show a relation between the ocean age and size of fish and their fecundity, those 

 fish of a greater length of ocean residence and size having the largest number of eggs. 

 Since a distinctive seasonal pattern in the occurrence of life-history categories and related 

 sex ratios exists, it is theorized that the commercial fishery could be so concentrated as 

 to deplete that i>ortion of the run of highest egg production potential. 



