Science & Data

The NOAA Alaska Fisheries Science Center Marine Mammal Laboratory (MML) Alaska Ecosystem Program (AEP) maintains a list of known Steller sea lion terrestrial sites in the United States portion of the sea lion range.

This is a list of all Steller sea lions branded by National Marine Mammal Laboratory (NMFS), Alaska Department of Fish and Game, and Alaska Sea Life Center between 2000 and May 2014. It does not include animals marked before the year 2000 and does not include animals marked in Russian waters. This list also does not include tagging information. Some of the animals on this list may also have been tagged with flipper tags.

This dataset contains counts of adult and juvenile (non-pup) Steller sea lions on rookeries and haulouts in Alaska Aleutian Islands, Bering Sea, and other areas made between that beginning of 1904 and June 18, 2015.

This database contains counts of Steller sea lion pups in Alaska between June 22, 1961 and July 4, 2019. Pup counts are conducted from the ground (by walking along the rookery), cliff-side overlooks, and aerial images (oblique and vertical orientation).

This Arctic survey of marine mammals in the Beaufort and Chukchi seas has been conducted every year off the northern and western coasts of Alaska since 1979. A long-term dataset like this is extraordinary because it is both unusual and important. Exact survey dates and boundaries have varied over time, but the study goals, general survey area, and survey methods have stayed remarkably similar. ASAMM is co-managed and conducted by the NOAA Fisheries Alaska Fisheries Science Center, and funded and co-managed by the Bureau of Ocean Energy Management.

Spacial data and maps of critical habitat and Endangered Species Act (ESA) threatened and endangered marine mammals under NOAA Fisheries jurisdiction in Alaska.

The Marine Mammal Laboratory (MML) conducted aerial, ship, and land-based surveys to count Steller sea lion (Eumetopias jubatus) pups and non-pups on terrestrial rookery and haulout sites in Alaska in June to July 2017.

This research survey focuses on Steller sea lions every summer when mothers come on shore to rear newborn pups. Researchers take this opportunity to count how many are onshore and thus giving us an idea of just how many Steller sea lions there are in the Alaskan Aleutian Island chain.

This research survey focuses on Steller sea lions every summer when mothers come on shore to rear newborn pups. Researchers take this opportunity to count how many are onshore and thus giving us an idea of just how many Steller sea lions there are in the Alaskan Aleutian Island chain.

Survey to attempt to discover why Steller sea lion numbers have been declining.