— X — 3 -YEAR-OLD MALES 



» 4-YEAR-OLD MALES x^ 



/■ \ 

 . x' \ y 



2 3 



ROUND NUMBERS 



Figure 2.--Kill of male seals, by age and round. 

 St. Paul Island, 1962. 



unintentionally. Assuming that the field obser- 

 vations are correct in suggesting that at least 

 the same proportion of increase in the male 

 kill was possible for the period 1-15 August 

 1962 as in 1961, the estimate obtained is 

 given in table 4. 



The total of all ages shown in table 4, 60,674, 

 is about 16 percent less than the 72,500 pre- 

 dicted. Table 5 compares the predicted and 

 actual kill of male seals in 1962. 



Bull Counts 



Figure 2 shows the number of male seals 

 killed, by age and round, on St. Paul Island, 



In 1960 and 1961 the kill of 3- year-old 

 males was increased about 12 and 25 percent, 

 respectively, from 6 to 15 August. Similar 

 increases in 1962 would have provided 3,000 

 to 6,000 additional animals. Field observa- 

 tions, which are subjective in nature, suggest 

 that a larger number of 3-year-old males 

 could have been taken after 5 August. During 

 the first 3 days of the female kill beginning 

 13 August, 1,041 3-year-old males were taken 



The 1962 bull counts are given in table 6 by 

 island and by rookery. All bull counts since 

 1910 are presented in appendix table 30. 



Harem bulls on St. Paul Island decreased 

 by 7.4 percent of the 1961 count; those on 

 St. George Island decreased 17.5 percent. The 

 total number of harem bulls on the Pribilof 

 Islands was 90.5 percent of the 1961 count, 

 bringing the 1962 level down to that of 1960. 



Idle bulls decreased by 17.6 percent of the 

 1961 count; St. Paul Island showed a decrease 



Table A-. — Estimated increase in kill by extrapolation to 

 15 August, Pribilof Islands, Alaska, 1962 



