Table 15. — Estimates of the yearling male population based on tags recovered from seals selected 

 and tagged as yearlings, year classes 1961-62, Pribilof Islands, Alaska 



[n= males killed each year from the year class; s = tag recoveries in each year; t = tags applied 

 to yearling males of each year class; N = estimate of yearling males in each year class] 



Year 



Age 



Males 

 killed 



(n) 



Tag 

 recoveries 



(s) 



Yearling 



males 



tagged 



(t) 



Estimate of 

 yearling 

 males 

 (N) 



1961 year class, N-series tags: 



1963 



1964 



1965 



Pooled 



1962 year class, 0-series tag: 



1964 , 



1965 



Pooled 



Years 



2 

 3 

 4 



Number 



2,019 

 28,827 

 14,638 

 45,484 



2,726 



22,745 

 25,472 



Number 



44 

 227 



81 

 352 



42 

 138 



180 



Number 

 603 



520 



Number 



27,113 

 76,369 



107,829 

 77,827 



33, 041 

 85,257 

 73,323 



Table 16. — Estimates of the pup population based on marked-to-unmarked ratios obtained by 

 sampling groups of 25 after shearing, year class 1965, St. Paul Island 



18 



