172 



166 



Figure 8. — Aerial surve> Iracklines flown in (he northern Bering and southern 

 Chukchi Seas 31 March and 1-3 April 1977. The two dots represent presence of 

 bowhead whales: a (otal of 5 whales were sighted with a mean group size of 1.7 

 (SD0.6). 



Figure 9. — Aerial survey Iracklines flown in the northern Bering and southern 

 Chukchi Seas 31 March and 1-3 April 1977. Dots represent presence of white 

 whales: a total of 370 whales were counted with a mean group size of 4.6 (SD 4.5). 



M H,. j^- ^hh l llll ll ffi^gff 



Beaufort Sea 



I ' I ' 1 1 M H 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 H -H 1 1 1 1 1 1 1 1 1 1 1 1 1 



167 161 155 149 143 



72 



70 



68 



164 



158 



152 



Figure 10. — Aerial survey tracklines flown in (he eastern Chukchi and southern 

 Beaufort Seas on 30 April and 1, 3, 8, 9, 12, and 14 May 1976. Dots represent 

 presence of bowhead whales: a total of 68 whales were counted with a mean 

 group size of 1.3 (SD 0.86). Whales were observed in the nearshore lead only in 

 the Chukchi Sea. 



Figure 11. — Aerial survey tracklines flown in the eastern Chukchi and western 

 Beauforl Seas on 15, 19, 20, 22, 24, 28, and 31 May 1976. Dots represent presence 

 of bowhead whales: a total of 30 whales were counted with a mean group size 

 equal to 1.2 (SD 0.82). Whales were observed in the nearshore lead only in the 

 Chukchi Sea. 



11 



