egg deposition. These 38 are not included in 

 table 1. 



The calculated number of eggs per female 

 ranged from 3,044 to 5,060, with an average 

 of 4,115 (table 1 and fig. 6). This is con- 

 siderably greater than the average of 3,700 

 for Karluk Lake (Gilbert and Rich, 1927) and 

 the averages for most British Columbia races 

 (Rounsefell, 1957), but lower than the average 

 of 4,500 for Cultus Lake (Foerster, 1936). The 



regression line in figure 6 was fitted by least 

 squares. Fecundities for fish in each length 

 group were read from this regression, and the 

 potential egg deposition of the run was then 

 calculated (table 1). Since the sex ratio was 

 1:1, it was necessary only to divide the total 

 number of fish by two to obtain the number of 

 females in the lake. An estimated 14,500 

 female sockeye salmon in Brooks Lake and 

 its tributaries deposited a theoretical total 

 of 57 million eggs (table 1). 



TABLE 1. — Potential egg deposition of sockeye salmon in Brooks Lake and Its 

 tributaries. Calculated from fecundity data from range of sizes in the 

 run, June 25 to Sept. 10, 1957 



