20 r 



Figure 7.— Pup mortality, study area 1, Reef Rookery, St. Paul Island, 1964, 1966, and 1967. 



The number of pups that died on area 1 of 

 Reef Rookery in 1964-67 is compared in table 

 6 with the total number of dead pups counted on 

 Reef Rookery and on St. Paul Island during the 

 same period. If we assume the population of 

 pups during this period has been constant at 

 280,000 [based on shearing and sampling--see 

 U.S. Fish and Wildlife Service, Bureau of Com- 

 mercial Fisheries (1969, table 19)] the annual 

 mortality for St. Paul Island was 7.7 percent 

 in 1964, 14.0 in 1965, 7.6 in 1966, and 5.3 per- 

 cent in 1967. 



Table 6. — Mortality of pups on study area 1 of Reef 

 Rookery, on Reef Rookery, and on St. Paul Island, 

 1964-67 



Year classes 



1964 



1965 1966 



1967 



Number 



Dead pups cleared from 



area 1 161 337 164 80 



Dead pups counted on Reef 



Rookery 3,000 7,664 3,562 2,008 



Dead pups counted on St. 



Paul Island 21,572 39,124 21,414 14,780 



Adults 



Table 7 shows the numbers of dead adult 

 males and females counted on the Pribilof 

 Islands in 1965-67. 



Table 7. — Counts of dead adult male and female seals, 

 Pribilof Islands, Alaska, 1965-67 



COUNTS ON LIVING ADULT MALE SEALS 



Adult males approximately age 7 and older 

 have been counted on the Pribilof Islands in 

 mid- July nearly every year since 1911 and 

 classified as harem (with one or more females) 

 or idle (without females) (table A- 13). The 

 counts on St. Paul Island in 1967 were obtained 

 on Reef, Lukanin, Kitovi, Tolstoi, and Zapadni 

 Reef Rookeries only, then extrapolated to pro- 

 duce an estimate representing all the rook- 

 eries. On the basis of proportional change ob- 

 served on the five sample rookeries between 

 1966 and 1967, the estimated totals for St. Paul 

 Island in 1967 were 7,230 harem and 4,439 

 idle males--a reduction from 1966 of 9 percent 

 in harem males and 24 percent in idle males. 



Since 1966, adult males have been classified 

 as shoreline (class 1), territorial without fe- 

 males (class 2), territorial with one or more 

 females (class 3), back fringe (class 4), or 

 hauling ground (class 5). Class 3 males were 

 formerly classified as harem males; classes 1, 

 2, 4, and 5 were counted as idle males. 



In 1967, we counted the five classes of adult 

 males on St. Paul Island on all rookeries in 

 June (table A- 14) and on Reef, Lukanin, Kitovi, 

 Tolstoi, and Zapadni Reef Rookeries in July 

 (table A- 15). We kept records of the number of 

 adult males of each class counted within sec- 

 tions established on the rookeries in 1966. 



We counted the five classes of adult males 

 on St. George Island on all rookeries in June 

 and July 1967 (table A-16). 



St. Paul Island St. George Island 



Year Males Females Males Females Males Females 



Total 



Number 



1965 

 1966 

 1967 



158 No count No count No count 158 No count 

 181 172 41 55 222 227 

 108 157 41 28 149 185 



REPRODUCTIVE CONDITION OF 

 FEMALE SEALS 



We examined the genital tracts and ovaries 

 of 1,362 females killed 1-15 August onSt.Paul 

 Island for evidence of parturition in 1967. The 



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