Alaska Steller Sea Lion Pup Count Database
This database contains counts of Steller sea lion pups on rookeries in Alaska made between 1961 and 2015. Pup counts are conducted in late June-July. Pups are counted from the ground (by walking along the rookery), from cliff-side overlooks, and from aerial images (oblique and vertical orientation). Pup counts conducted in late June-mid July are considered to represent a complete census of pups produced at each site during the year.