ALASKA FISHERY AND FUR-SEAL INDUSTRIES, 1927 171 



Complete computation ofjur seals, Pribilof I stands, as of August 10, 1927 — Continued 



Class 



Surplus bulls, 7 years and over, estimated: 



6-year-old males, August 10, 1926 



6-year-old males killed fall 1926 



6-year-old males end 1926 



Natural mortality, 20 per cent.. 



7-year-old males beginning 1927. 

 7-year-old males killed 1927 



7-year-old males, August 10, 1927. 



Surplus bulls, August 10, 1926. 

 Natural mortality, 30 per cent. 



Remaining surplus for 1927 



Breeding bulls of 1926.... 



Natural mortality, 30 per cent . 



1926 bulls remaining, 1927 



Breeding bulls, 1927 



1926 bulls remaining, deducted. 



Increment of new bulls in 1927.. 



7-year-old males computed for 1927. 

 Surplus bulls computed for 1927 — 



Total theoretical surplus bull stock, 1927 



New increment of breeding bulls deducted — 



Surplus bulls in 1927 



50 per cent deducted for losses due to fighting, natural causes, and 

 errors in loss percentage in previous years 



Surplus bulls, August 10, 1927 



St. Paul 

 Island 



St. George 

 Island 



12, 037 



12, 037 

 2,408 



9,629 



9,629 



1,972 

 592 



1,380 



3,846 

 1,154 



2,692 



4,762 

 2,692 



2,070 



9,629 

 1,380 



11, 009 

 2,070 



8,939 

 4,469 



4,470 



1,397 



1,397 

 279 



1,118 



1,118 



30 



611 



183 



428 



853 

 428 



1,118 

 21 



1,139 

 425 



714 

 357 



Total 



13, 434 



13, 434 



2,687 



10, 747 



10, 747 



2,002 

 601 



1,401 



4,457 

 1,337 



3,120 



5,615 

 3,120 



10, 747 

 1,401 



12, 148 

 2,495 



9,653 

 4,826 



4,827 



RECAPITULATION 



Pups 263,566 



Cows 263,566 



Harem bulls 4, 643 



Idle bulls - 972 



Yearling females 67,131 



Yearling males 61,026 



2-year-old females 48,186 



2-year-old males 41,252 



3-year-old males 9,730 



4-year-old males 14,448 



110893—28 8 



5-year-old males. 16,073 



6-vear-old males.. 13,450 



Surplus bulls 4,827 



Total, 1927.. 808,870 



Total, 1926. 761,281 



Numerical increase, 1927 47,589 



Per cent increase, 1927 6. 25 



o 



