The Occurrence of California Sea Lions (Zalophus californianus) in Alaska

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 Nino years. This compilation includes the northernmost (60° 46' N, n = 1) and westernmost (170° 07' W, n = 2) sightings for this species.