Aerial and Ship-Based Surveys of Steller Sea Lions 'Eumetopias jabatus' in Southeast Alaska, the Gulf of Alaska, and Aleutian Islands during June and July 1992

摘要

Aerial and ship-based surveys of Stellar sea lions (Eumetopias jubatus) were conducted during June and July 1992 from Forrester Island in Southeast Alaska to Attu Island in the western Aleutian Islands. A total of 34,844 adult and juvenile sea lions were counted at 95 'trend sites'. The 1992 count represents a decline of 70.2% from 1979 (116,804) and a decline of 4.4% (P = 0.043) from 1991 (36,459).