Counts of Alaska Steller sea lion adult and juvenile (non-pup) conducted on rookeries and haul-outs in Alaska Aleutian Islands, Bering Sea, and others from 1904-01-01 to 2015-07-18 (NCEI Accession 0128190)

• Format: Dataset
• Language: unknown
• Published: NOAA NCEI Environmental Data Archive 2016
• Subjects: DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce; DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce; 0128190; 128190; ANIMALS - INDIVIDUAL - COUNTS; BIOLOGICAL DATA; cetacean; MARINE MAMMALS; biota surveys; visual observation; biological; in situ; marine mammal observation; survey; survey - biological; AIRCRAFT; US DOC; NOAA; NMFS; Alaska Fisheries Science Center; National Marine Mammal Laboratory; STELLER SEA LION RESEARCH; Bering Sea; Coastal Waters of Southeast Alaska and British Columbia; Gulf of Alaska; North Pacific Ocean; Prince William Sound (Gulf of Alaska); oceanography; Aerial survey; Eumetopias jubatus; Steller sea lion; otariid; pinniped; population; OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN; OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA; OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA; Alaska; Aleutian Islands; British Columbia; Prince William Sound; Pacific; Coastal Waters Of Southeast Alaska
• Online Access: https://search.dataone.org/view/{ACBA3969-8362-42BB-AF62-AC22110FBC08}

This dataset contains counts of adult and juvenile (non-pup) Steller sea lions on rookeries and haul-outs in Alaska made between 1904 and 2015. Non-pup counts have been conducted throughout the year. Breeding season (June-mid July) non-pup counts are used for population trend analysis, while counts at other times are used for analyses of distribution and for other purposes. Non-pups are counted from the ground (by walking along the rookery), from cliff-side overlooks, and from aerial imagery (oblique and vertical orientation). Non-pup counts represent only a fraction of the total number of animals that may use a site. Sea lions haulout less frequently in winter than in summer; thus, winter counts represent a smaller fraction of the total population than summer counts.