PUR-SEAL CENSUS, PRIBILOF ISLANDS, 1919. 117 



6-year-old males, estimated: 



5-year-old males, Aug. 10, 1918 11, 941 



5-year-old males killed, fall of 1918 148 



5-year-old males, end of 1918 11, 793 



5 per cent deducted for natural mortality 589 



6-year-old males, liesrinning of 1919 11, 204 



6-year-old males killed in 1919 2, 213 



6-year-old males, Aug. 10, 1919 S, 991 



Surj)lu8 bulls, counted and estimated: 



Breeding bulls in 1918 7, 788 



20 per cent deducted for old-age loss 1, 557 



1918 bulls remaining in 1919 6, 231 



Breeding bulls in 1919 7, 397 



1918 bulls remaining, deducted 6, 231 



Increment of new bulls in 1919 1, 166 



6-year-old males in 1918 13, 755 



Surplus bulls in 1918 17, 110 



Total surplus bull stock for 1919 30, 865 



Deduct number killed, fall of 1918 64 



Surplus bulls at end of 1918 30, 801 



20 per cent deducted for old-age loss 0, 160 



Remaining surplus for 1919 24, 641 



7-year-olds and over killed in 1919 4, 238 



Total surplus in 1919 20, 403 



Increment of new breeding bulls in 1919 deducted 1, 166 



Surplus bulls in 1919 19, 237 



Estimated 50 per cent loss due to fighting and natural causes . . 9, 618 



Surplus bulls, Aug. 10, 1919 9, 619 



REC.AriTUI.ATION. 



Pups 157, 172 



Cows 157, 172 



Harem bulls 5, 158 



Idle bulls 2, 239 



Yearling females 46, 447 



Yearling males 4(\, 444 



2-year-oId females '. 33, 287 



2-year-()ld males 3;}, 081 



3-year-old males 13, 596 



4-year-old malen 5^ 747 



5-year-<jld mal« h 5^ 282 



6-year-old niaie.s 8, 991 



Surplus bulls 9, 619 



Total 524, 235 



