
Table 2.—--Number of harem and idle bulls counted annually on 

Year 
1911 
1912 
1913 
1914 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
1924 
1925 
1926 
1927 
1928 
1929 
1930 
1931 
1932 
1933 
1934 
1935 
1936 
1937 
1938 
1939 
1940 
1941 
1942 
1943 
1944 
1945 
1946 
1947 
1948 
1949 
1950 
1951 

the Pribilofs, 1911-51. 
[From U. S. Bureau of Fisheries except for 1914, from Osgood, 
Preble, and Parker (1915, p. 27), and for 1951, from the general 
manager's report. Counts were not made on St. George Island in 
1936 and 1938, because of bad weather, and on either island in 1942, 
because of war. In the annual counts from 1940 to 1948, arbitrary 
values of 400 harem and 165 idle bulls for Sivutch rookery (Sea-Lion 
Rock, St. Paul Island) were used; from 1949 to 1951, counts of 150 
harem and 50 idle bulls were used, based on aerial photographs taken 
on 15 July 1948. Starting in 1950 the Sivutch bulls are included in 
the Reef rookery count. ] 
St. Paul Island St. George Island Both islands 
Harem Idle Haren Idle Harem Idle 
1,090 258 266 71 1,356 329 
1,077 93 281 20 1,358 113 
1,142 17 261 28 1,403 105 
1, 316 159 243 13 1,559 172 
1,789 516 362 127 2,151 673 
2,948 2,278 552 354, 3,500 2,632 
4,166 §=.2, 341 684 365 4,850 2,706 
4,610 2,245 734 199 5,344 2,444 
4,573 2,158 585 81 5,158 2,239 
3,542 1,078 52h $3 4,066 1,161 
3,443 711 166 36 3,909 147 
3,184 493 378 15 3,562 508 
3,051 303 361 9 3,412 312 
3,127 375 389 15 3,516 390 
3,103 283 423 28 3,526 311 
3,478 368 556 55 4,034 423 
3,916 846 727 126 A643 972 
5,059 1,208 991 241 6,050 1,449 
5,998 1,339 1,189 294 7,187 1,633 
6,823 1,555 1,489 344 8,312 1,899 
7,557 1,519 1,676 369 9,233 1,388 
8,268 1,940 1,820 409 10,088 2,349 
8,334 1,933 1,879 408 10,213 2,341 
8,841 1,860 1,929 422 10,770 2,282 
9,444 2,082 2,103 453 11,547 2,535 
10,055 2,253 Mm ee eee 
10,689 2,516 2,411 515 13,100 3,031 
10,720 1,787 = = ---—- me ne 
9,122 2,616 1,858 357 10,980 2,973 
9,662 3,968 1,988 571 11,650 4,539 
10,089 5,059 1,942 396 12,031 5,455 
10,948 3,523 2,107 330 13,055 3,853 
11,080 2,539 25294 450 13,374 2,989 
10,750 4,055 2,434 750 13,184 4,805 
10,566 3,605 2,430 611 12,996 4,216 
10,160 3,331 1,808 479 11,968 3,810 
10,386 3,400 1,814 563 12,200 3,963 
9,304 2,861 1,745 552 11,049 3,413 
9,442 3,152 1,959 574, 11,401 3,726 
9,434 3,581 1,825 549 11,259 4,130 
