Figure 6. — Biologist examining seals for tags and checkmarks, byproducts plant, 

 St. Paul Island, 1965 (photo by Harry W. May). 



14 



U) 



mio 



CO 



is 



< 

 en 



O 



X 



/ 



o o HAREM BULLS 



X X IDLE BULLS 



J L 



1950 '51 '52 '53 '54 '55 '56 '57 '58 '59 '60 '61 '62 '63 '64 '65 



YEARS 



Figure 7. — Counts of harem and idle bulls, Pribilof Islands, Alaska, 1950-55 and 1957-65. 



