Table 17. --Counts of pups on three rookeries compared to estimates based on shearing and 



sampling, year class 1966, St. Paul Island 



1/ Excluding point south of Sea Lion Neck. 



Table 18. --Estimates of the pup population at the time of marking based on shearing 

 and sampling, year classes 1961-66, St. Paullslandi/ 



Rookery 



1961 



1962 



1963 



1964 



1965 



1966 



-Number- 



Reef, Gorbatch, Ardiguen 85,700 73,800 55,600 



Polovina, Polovina Cliffs 21,600 23,000 23,800 



Little Polovina 7, 500 5, 900 6, 500 



Vostochni, Morjovi 47,400 38,800 52,000 



Tolstoi 34,800 21,600 23,600 



Little Zapadni 18,900 13,200 20,000 



Zapadni, Zapadni Reef 38,000 31,600 32,400 



Lukanin, Kitovi 22,100 23,900 16,000 



Sea Lion Rock 



65, 100 

 27, 400 

 8, 400 

 59, 800 

 2 5, 400 

 17, 100 

 39, 900 

 19, 200 



51, 800 

 23, 300 

 7, 000 

 51, 900 

 26, 800 

 15, 300 

 32, 500 

 17, 100 



58, 500 

 28, 900 

 8, 700 

 68, 000 

 27, 000 

 23, 000 

 42, 200 

 21, 200 

 18, 000 



Total 



276,000 231,800 229,900 262,300 225,700 295,500 



1/ Estimates for some rookeries have been combined to permit comparison by years. 

 Th'i estimates do not include pups that died before marking. Pups were marked by tag- 

 ging in 1961 and 1962 and by shearing in 1963-66. 



Table 19. --Estimates of the total pup population based on shearing and sampling and the count of 

 dead pups, year classes 1961-66, Pribilof Islands, - Alaska 



1961 



1962 



1963 



1964 



1965 



1966 



-Number 



Estimate at time of 

 marking for St. Paul 

 Island 



Dead pups counted on 

 St. Paul Island 



Number of pups born 

 on St. Paul Island 



Estimate for Pribilof 

 Islands?y 



276,000 231,800 229,900 262,300 225,700 277,500 



60,800 47,600 34,200 22,700 41,100 22,500 



336,800 278,400 264,100 285,000 266,800 300,000 



421,000 348,000 330,000 356,000 334,000 377,000 



_1/ Does not include estimate for Sea Lion Rock (Sivutch Rookery). 



2/ The estimate for 1966 includes that taken from table 18 plus a count of 27,400 dead pups. The 

 esTimates for 1961-65 were derived by expanding the number of pups born on St. Paul Island by a 

 factor of 1 . 25. 



23 



