136 



U. S. BUKEAU OF FISHERIES 



Distribution of pups on the Pribilof Islands, August 10, 1923, and compo/rison 

 tcith distribution in 1922 



Rookery 



1923 



Living 

 pups 



Dead 

 pups 



Total 

 pups 



Per cent 

 dead 

 pups 



1922, 

 total 

 pups 



Increase 



(+)or 



decrease 



(-) 



Per cent 



increase 



(+)or 



decrease 



(-) 



St. Paul Island: 



Kitovi.. 



Lukanin. 



Qorbatch 



Ardiguen 



Reef 



Sivuteh 



Lagoon... 



Tolstoi. 



Zapadni 



Little Zapadni 



Zapadni Reef 



Polovina 



Polovina Cliffs 



Little Polovina 



Morjovi 



Vostochni 



Total 



St. George Island: 



North 



Staraya Artil 



Zapadni 



South 



East Reef 



East Cliffs 



Total 



Total (both islands) 



5,171 

 3,383 



14, 471 

 1,024 



26, 121 



8,393 



262 



17,809 



16, 756 

 8,723 

 313 

 9,942 

 4,643 

 1,978 

 3,891 



43, 514 



166, 394 



10, 584 

 7,980 

 1,297 

 314 

 1,917 

 5,715 



27, 807 



194, 201 



77 



75 



126 



25 



387 



210 



1 



251 



293 



224 



3 



154 



88 



51 



80 



924 



5,248 

 3,458 



14, 597 

 1,049 



26,508 



8,603 



263 



18, 060 



17,049 



8,947 



316 



10, 096 

 4,731 

 2,029 

 3,971 



44,438 



1.47 

 2.17 



.86 

 2.39 

 1.46 

 2.44 



.37 

 1.39 

 1.72 

 2.50 



.80 

 1.53 

 1.85 

 2.51 

 2.02 

 2.08 



5,934 

 3,544 



14, 117 

 1,004 



25, 452 



8,161 



273 



19, 497 



16.100 

 8,846 

 497 

 8,770 

 3,949 

 1,516 

 3,918 



37, 308 



+480 



+45 



+1, 056 



+442 



-10 



-1,437 



+949 



+101 



-181 



+1, 326 



+782 



+513 



+53 



+7, 130 



2,969 



169, 363 



1.73 



158, 886 



+10, 477 



150 



211 



15 



6 



21 



10, 734 

 8,191 

 1,312 

 320 

 1,938 

 5,801 



1.40 

 2.58 

 1.12 

 1.72 

 1.51 

 1.49 



10, 364 

 7,056 

 895 

 232 

 2,380 

 6,101 



+370 

 +1, 135 

 +417 

 +88 

 -442 

 -300 



489 28,296 



1.73 



27,028 



+1, 268 



3,458 



197, 659 



185, 914 



+11, 745 



-11.56 



-2.43 



+3.40 



+4.48 



+4.15 



+5.42 



-3.66 



-7.37 



+5.89 



+1.14 



-36. 42 



+15. 12 



+19. 80 



+33.84 



+1.35 



+ 19. 11 



+6.59 



+3.57 

 +16.09 

 +46. 59 

 +37. 93 

 -18.57 



-4.92 



+4.69 



+6.3 



In the foregoing tabulation the percentage of increase of pups on 

 St. Paul Island is 6.59 Avhile that on St. George Island is 4.69. The 

 total number of pups increased 6.32 per cent. St. Paul Island is 

 credited with 169,363 pups and St. George Island Avith 28,296, a total 

 of 197,659 pups. 



In 1922 the dead pups were counted on all rookeries and found to 

 be 1.73 per cent of the total. In 1923, with similar weather and with 

 a decrease of fighting bulls but an increase in cows and number of 

 pups, it was not believed that the percentage of dead pups varied 

 materially from that in 1922. Consequently the same percentages 

 were used. They show a total of 3,458 pups dead on all rookeries. 



COWS 



Assuming, as in the past, that the number of cows is equal to the 

 number of pups, there were on St. Paul Island 169.363 cows and on 

 St. George Island 28,296, a total of 197,659.'' 



Cows that were branded in 1902, oi- before, Avith a single bar across 

 the back continue to a]:)pear on the rookeries of St. George Island. 



» E. M. Ball, assistant agent, Bureau of Fisheries, has reported that on May 10, 1923, 

 a native took a female seal 20 miles off Biorka Island, southeast Alaska, which carried 

 two pups. Mr. Ball examined both pups several days later and weighed them. One 

 weighed 5 pounds 11 ounces, the other 1 pound 8 ounces. The larger one was well haired 

 but the other was almost hairless. The incident is worthy of note but, of course, has no 

 practical bearing upon the census work, which utilizes the well-established biological fact 

 that female seals of the Pribilof Islaisds give birth to but one pup a year. 



