Table 23. --Estimates of the pup population from marked to unmarked ratios, 

 St. Paul Island, year classes 1961-64 



The estimates for some rookeries have been combined so that the estimates 

 for each year are comparable. 

 Pups marked by tagging. 

 Pups marked by shearing. 



Table 24. --Estimates of the pup population from live pup 

 sampling and tag recoveries, Pribilof Islands , Alaska, 

 year classes 1960-64 



Year Estimate from Estimate from 

 class live pup sampling tag recoveries 



1960 1 438, 000 2 568, 000 



1961 3 345, 000 2 495, 000 



1962 3 255, 000 4 373, 000 



1963 3 287, 000 



1964 3 328, 000 



Estimated from sampling pups on two rookeries and ex- 

 tending to both islands. 



2 From table 18, p. 17, this report. 



3 From table 23, p. 21, this report, and divided by 0. 8 to 

 represent both islands. 



4 From table 17, p. 16, this report. 



21 



