Abstract: A total of 52 (25 male, 5 female, and 22 undetermined) California sea lions (Zalophus californianus) have been reported in Alaska during the past three decades, with an increasing presence in recent years. They have been observed during all seasons of the year, although most often during the spring. The presence of California sea lions in Alaska was correlated with increasing populations within their southern breeding range. There was no correlation between the number of sightings in Alaska and El Niño years. This compilation includes the northernmost (60° 46′ N, n = 1) and westernmost (170° 07′ W, n = 2) sightings for this species.

Key Words: Alaska, California sea lion, Zalophus californianus, vagrants, range extension

Document Type: Research article

DOI: 10.1578/AM.30.3.2004.427

Page Numbers: 427-433