Bull Counts . --Harem and idle bulls de- 

 creased for the third successive year. The 

 1964 bull counts by island and by rookery 

 are given in table 4, and all bull counts since 

 1911 are presented in appendix table 9. 



Harem bulls on St. Paul Island decreased 

 by 1.4 percent of the 1963 count; those on 

 St. George Island decreased by 4.0 percent. 

 The magnitude of the percent decrease from 

 1963 to 1964 was less than that from 1962 

 to 1963 when St. Paul Island had 10.9 percent 

 fewer and St. George had 11.6 percent fewer 



harem bulls. The total number of harem bulls 

 on the Pribilof Islands was 98 percent of the 

 1963 count. 



The idle bulls on St. Paul Island decreased 

 7.3 percent from 1963; those on St. George 

 Island decreased by 21.2 percent. The magni- 

 tude of the percent decrease was also less 

 than that for the 1962-63 counts when St. Paul 

 Island had 16.0 percent fewer and St. George 

 Island had 28.7 percent fewer idle bulls. The 

 total number of idle bulls on the Pribilof 

 Islands was 90 percent of the 1963 count. 



Table 4. --Harem and idle bull count, by rookery, Pribilof 

 Islands, Alaska, 1964 



