184 U. S. BUREAU OF FISHERIES 
Complete computation of fur seals, Pribilof Islands, as of August 10, 1939—Continued 
ta a 
St. Paul St. George 
Class Island Island Total 

Surplus bulls, 7 years old and over, estimated—Continued. 






Breeding bulls of 1938_-...----.----------------------------- 12, 507 2,778 15, 285 
Natural mortality, 30 percent 3, 752 833 4, 585 
1938 bulls remaining in 1939_---=--__-e----= 8, 755 1,945 10. 700 
Breeding bulls\ofsl0s0 sees eee nee ee one 11, 738 2,215 13, 953 
Toss! bulls remaining deductedes 222 as) on -posen nee ee 8, 755 1, 945 10. 700 
Increment of newsbullsimilo39= stan s 2-2 a eee See 2, 983 270 3, 253 
7-year-old males computed for 1939.___------__--_.-.-_------- my 11, 883 1, 932 13, 815 
Surplusibullstcomiputed tors 030ue essere ann eee ee eee ee ee eee 5, 094 
Motalstheoretical pull:stockifor 193922 22222222 22252 Stoo eee ee ee 18, 909 
New incrementiol breeding: bulisideducted=: = 2222225 aap ee ee a eee eee 3, 253 
Surplus bulls yloo Oe ee 2: ho WEES eons see cece ee eae) oe Ue eae Ae 15, 656 
50 percent deducted for losses due to natural causes, and 
errors/in.loss,percentages in.previous years. ---..-.--.----.|------s22<-2n-|e-- = sone 7, 828 
SurplussbulisteAug. 10; 4039 ats oe eee eee oe ol el es 7, 828 
Recapitulation 
Class Total Class Total 
(PALS ete eae eres onan eee ee kee 663, 634 |} 5-year-old males___.--.--------------_- 21, 839 
COWS soc awe ee we Ee Sha ee es 663, 634 || 6-year-old males_2._-_.-.----..--+.-=-. 14, 561 
Harem Dillsoe te we ane te ee ae TOZ980" |) Surplus Dulls2= 222 2 os eee ee 7, 828 
Idle bulls_-____- a REE Beh adet aie EE 2, 973 ————— 
Wiearlinevemales= ae oe aac ee eee 168, 988 Total 193922 =. 5 = Lene eee 2, 020, 774 
Sigel Orr hl aceee eee eee ne eEO 16S"62107| |e Total yl 938 tes eqn neem nmr mon apse 1, 872, 438 
Deveat-OldTeMialeses = meee ees nes 132. 999 — 
Z-VOaL-Oldsimaleseamn amen aoe aee ee eaee 116, 124 || Numerical increase, 1939___-_.-.--_--- 148, 336 
o-year-oldimaleses 2s i Meee Se 37, 107 || Percent increase, 1939_........-.-.--_- 7.92 
4-Vear-0ldrMaleste ssa. tae eee ee 26,486 
O 
