ALASKA FISHERY AND FUR-SEAL INDUSTRIES, 1927 



169 



Distribution of pups on the Pribilof Islands, August 10, 1921 



with distribution in 1926 



and comparison 



Rookery 



St. Paul Island: 



Kitovi 



Lukanin 



Gorbatch _ 



Ardiguen 



Reef 



Sivutch 



Lagoon 



Tolstoi 



Zapadni __ 



Little Zapadni - 

 Zapadni Reef... 



Polovina 



Polovina Cliffs.. 

 Little Polovina - 



Morjovi 



Vostochni 



Total 211,349 



-St. George Island: 



North 



Staraya Artil.. 



Zapadni 



South - 



East Reef 



East Cliffs 



Total - 



Living 

 pups 



8,591 



4,125 



21, 949 



2,044 



43, 821 



13,275 



40 



25, 815 



24,725 



12, 503 



441 



8,903 



4,858 



1,758 



3,176 



35,325 



17, 298 

 12, 878 



1,845 

 429 



3,960 

 11,307 



47, 717 



Total (both islands) ; 259,066 



1927 



Dead 

 pups 



128 

 91 



190 

 50 



Total 

 pups 



364 

 433 

 321 

 4 

 138 

 92 

 45 

 65 

 750 



Per cent 

 dead 

 pups 



3,652 



8,719 



4,216 



22, 139 



2,094 



44,470 



13,607 1 



40 I 



26, 179 I 



25, 158 



12, 824 



445 , 

 9,041 

 4,950 j 

 1,803 

 3,241 i 

 36,075. 



1.47 

 2.17 

 .86 

 2.39 

 1.46 

 2.44 



1.39 

 1.72 

 2.50 

 .80 

 1.53 

 1.85 

 2.51 

 2.02 

 2.08 



Total 

 pups 



8,073 



3,904 



20, 499 



1,939 



41, 176 



12, 599 



109 



24,240 



23, 294 



11,874 



412 



8,371 



4,583 



1,669 



3,001 



33, 403 



215, 001 



1. 70 I 199, 146 



246 

 341 



21 

 8 



61 

 171 



17, 544 

 13,219 



1,866 

 437 



4,021 

 11,478 



1.40 

 2.58 

 1.12 

 1.72 

 1.51 

 1.49 



48, 565 



1.75 



16,244 

 12,240 



1,728 

 405 



3,723 

 10,628 



44,968 



4, 500 263, 566 



1.71 244,114 



Increase 



646 



312 



1,640 



155 



3,294 



1,008 



-69 



1,939 



1,864 



950 



33 



670 



367 



134 



240 



2,672 



15, 855 



1,300 

 979 

 138 

 32 

 298 

 850 



3,597 



19, 452 



There was an increase in total pups on St. Paul Island of 15,855, 

 on St. George Island, 3,597- — a total increase of 19,452. Dead pups 

 computed for St. Paul Island numbered 3,652, for St. George Island, 

 848 — a total of 4,500. The percent dead was approximately 1.71. 



COMPLETE COMPUTATION 



Following is a summary of the method used for computing the num- 

 ber of animals in the Pribilof Islands fur-seal herd in 1927, together 

 with a recapitulation of the herd by classes. It will be noted that 

 the increase in the total number of seals over 1926 was 47,589, or 

 6.25 per cent. The increase in 1926 over 1925 was 38,231, or 5.29 

 per cent. 



Complete computation oj Jur seals, Pribilof Islands, as of August 10, 1927 



Class 



St. Paul 

 Island 



St. George, 

 Island ! 



Total 



Pups, estimated 



Breeding cows, 3 years old and over, by inference 



Hnrem bulls, counted 



Idle bulls, counted 



Yearlings, male and female, estimated: 



Femnles born in 1920 



Natural mortality, 45 per cent 



Yearling females, August 10, 1927 



215, 001 



215, 001 



3,916 



846 



99, 573 

 44,808 



54, 765 



48, 565 



48, 565 



727 



126 



22, 484 

 10, 118 



12, 366 



263, 566 



263, 566 



4,643 



972 



122, 057 

 54, 926 



67, 131 



