^_ffi 



ii_ 



5-YEAR-OLD — HHI 

 4-YEAR-OLD — J5553 

 3-YEAR-OLD — £^ 



2-year-old— mnn 



s 





11111 



u 



I 



u 



I947 '48 '49 '50 '51 '52 '53 '54 '55 '56 '57 '58 '59 '60 '6 1 '62 '63 '64 '65 '66 '67 



YEAR CLASS 



Figure 5. — Kill of male seals, by year class, Pribilof Islands, Alaska, 1947-67. 



Harem and idle males counted in mid-July 

 of 1966-69 are compared by rookery in table 

 A-10, and the adult males counted in June of 

 those years are compared by class and rookery 

 in table A-ll. 



Living Pups Weighed 



We have weighed pups annually since 1957 

 on St. Paul Island to continue a study of the 

 relation, if any, of body weight in autumn to 

 the kill of males from the year class at ages 

 2 through 5. The average weights of the pups 

 in 1969 were 9.8 kg. for males and 8.6 kg. for 

 females. These weights were 0.3 kg. more for 

 males and 0.2 kg. more for females than the 

 average of weights for 1957-69 (table A-16). 



In 1969, as in other years, differences were 

 significant between the weights of pups from 

 different rookeries (P<0.01) and between the 

 weights of males and females (P<0.01) (table 

 2). Differences between sexes were greater 

 than differences between rookeries. Table 3 



gives the variances and means of the weights 

 of pups. 



Table 2. — Analysis of variance in the weights of living 

 seal pups, St. Paul Island, 28-29 August 1969 



1 P<0.01. 



Dead Seals Counted That Were 

 Older Than Pups 



We found 116 males and 170 females older 

 than pups dead on the beaches of St. Paul and 

 St. George Islands in 1969, and collected the 

 canine teeth from most of them for studies of 

 age and mortality (some of the males had lost 

 their canines). Table 4 gives the number of 

 dead animals of each sex counted since 1965. 



