72 



U. S. BUREAU OF FISHERIES 

 COMPLETE COMPUTATION 



The following summary shows the methods used for computmg 

 the number of animals in the Pribilof Islands fur-seal herd m 1934. 

 Tiie total number of seals of all classes is 1,430,418, or 111,850 more 

 than were in the herd in 1933. This is an increase of 8.48 percent 

 over the preceding year. 



Complete computation of fur seals, Pribilof Islands, as of Aug. 10, 1934 



Class 



Pups, estimated vw "" 



Breeding cows, 3 years old and over, by inference. 



Harem bulls, counted 



Idle bulls, counted - --- - 



Yearlings, male and female, estimated: 

 Females born in 1933 



Natural mortality, 40 percent 



Yearling females, Aug. 10, 1934. 



Males born in 1933 



Natural mortality, 40 percent.. 



Yearling males, Aug. 10, 1934. 



2-year-olds, male and female, estimated: 



Yearling females, Aug. 10, 1933 



Natural mortality, 15 percent 



2-year-old females, Aug. 10, 1934..- 



Yearling males, Aug. 10, 1933... 

 Natural mortality, 17.5 percent. 



2-year-old males beginning 1934. 

 2-year-old males killed in 1934.. 



2-year-old males, Aug. 10, 1934. 



3-year-old males, estimated: 



2-year-old males, Aug. 10, 1933... 

 Natural mortality, 12.5 percent. 



3-year-old males beginning 1934.. 

 3-year-old males killed in 1934... 



3-year-old males, Aug. 10, 1934. 



4-year-old males, estimated: 



3-year-old males, Aug. 10, 1933.... 

 Natural mortality, 10 percent 



4-year-old males beginning 1934.. 

 4-year-old males killed in 1934 



4-year-old males, Aug. 10, 1934. 



5-year-old males, estimated: 



4-year-old males, Aug. 10, 1933- 

 Natural mortality, 10 percent.. 



5-year-old males, Aug. 10, 1934. 



6-year-old males, estimated: 



5-year-old males, Aug. 10, 1933. 

 Natural mortality, 20 percent.. 



6-year-old males, Aug. 10, 1934. 



St. Paul 

 Island 



368, 519 



368, 519 



8,841 



1,860 



St. George 

 Island 



170, 616 

 68, 246 



102, 370 



170, 616 

 68, 246 



102, 370 



94, 789 

 14, 218 



80, 571 



94,788 

 16, 588 



78, 200 

 777 



77, 423 



71, 498 

 8,937 



62, 561 

 41,818 



20, 743 



14, 695 

 1,470 



13, 225 

 330 



12, 895 



13, 399 

 1. 340 



12, 059 



8,616 

 1,723 



6,893 



83. 232 



83, 232 



1,929 



422 



38, 534 

 15, 414 



23, 120 



38, 533 

 15,413 



23, 120 



21, 408 

 3,211 



Total 



18, 197 



21, 407 

 3,746 



17, 661 

 164 



17, 497 



16, 164 

 2,020 



14, 144 

 10, 117 



4,027 



3,521 

 352 



3,169 

 202 



2,042 

 204 



1,838 



1,600 

 320 



1,280 



451, 751 



451, 751 



10,770 



2,282 



209,150 

 83,660 



125, 490 



209, 149 

 83. 659 



125. 490 



116, 197 

 17,429 



98,768 



116,195 

 20,334 



95,861 

 941 



94.920 



87,662 

 10, 957 



76, 705 

 51,935 



24, 770 



18, 216 



1,822 



16,394 

 532 



15,862 



15,441 

 1,544 



13.897 



10, 216 

 2,043 



8.173 



