254 



NORTH AMERICAN FAUNA 74 



Fig. 138. High- and low-density zones of walrus distribution in the Bering Sea, April 

 1972. (Adapted from Kenyon 1972) 



and 4% (570) were adult females and immature animals of both sexes. Of the 

 males, 63% (8,600) were under 15 years old and 37% (5,050) were 15 years and 

 older. Of the females and young, 41 % (230) were immatures of both sexes and 

 59% (340) were adult females. 



• In the Bristol Bay low-density zone, the total number of animals was 

 estimated at 15,730. Of those, about 56% (8,810) were males 10 years and older 

 and 44 % (6,920) were adult females and immature animals of both sexes. Of the 

 males, 63% (5,550) were under 15 years old and 37% (3,260) were 15 years and 

 older. Of the females and young, 41 % (2,840) were immatures of both sexes and 

 59% (4,080) were adult females. 



• In the Bristol Bay high-density zone, the total number of animals was esti- 

 mates at 34,410. Of those, about 3% (1,030) were males 10 years and older and 

 97% (33,380) were adult females and immature animals of both sexes. Of the 

 males, 10% (100) were under 15 years old and 90% (930) were 15 years and * 

 older. Of the females and young, 41 % (13,690) were immatures of both sexes 

 and 59% (19,690) were adult females. 



The composition derived from these estimates (Table 45) is imprecise, and its 

 most obvious errors seem to be in the numbers of immature and subadult males. 



