THE SEA OTTER IN THE EASTERN PACIFIC OCEAN 161 



T 



Amlia--159 



.10 Mi.. 174° 172° 

 / L_ 



Figure 77. — The colonies on the southern exposures of Atka and Amlia 

 Islands, in the eastern Andreanof Islands, appear to be augmented from 

 the large population in the central Andreanofs (Adak-Great Sitkin area). 

 Repopulation is proceeding at Atka and Amlia as it did at Amchitka, 

 where a large population developed on the south side of the island before 

 the north exposure was repopulated. On aerial surveys of 21 April and 6 

 May 1965, 421 otters were observed in the area shown. 



Village on Atka Island. Several other islands were occupied by the 

 military during World War II. 



The group is of special interest because detailed observations 

 on population growth and range extension of sea otters were ob- 

 tained there. Aerial surveys of the entire group were conducted 

 in late May 1959, early April 1962, and early May 1965. In all 

 significant areas these surveys were conducted with excellent 

 observation conditions and by the same observers (D. L. Spencer 

 and Kenyon). The surveys offer the best comparable data avail- 

 able. Field observations, population estimates, and population 

 density are summarized in table 25. 



Analyses of observed population growth and of population fluc- 

 tuations are presented for individual islands on the following pages 

 and a discussion of the group as a unit is presented below. 



The sea otter populations at islands from Tanaga on the west 

 to Seguam on the east (exclusive of Bobrof Island, which is small 



