Science & Data

The Alaska Fisheries Science Center, Alaska Ecosystems Program (AEP) datasets are available on the NOAA Fisheries Open Data Portal.

Tracks the implementation of recovery actions from Endangered Species Act (ESA) recovery plans.

The Marine Mammal Laboratory conducted aerial surveys to photograph and count Steller sea lion pups (approx. 1 month old) and non-pups (adults and juveniles ≥ 1 year old) on known terrestrial rookery and haulout sites in Alaska in June-July 2019.

The Marine Mammal Laboratory (MML) conducted aerial- and ship-based surveys to count Steller sea lion pups and non-pups in Summer 2018.

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.

Steller sea lions (Eumetopias jubatus) use terrestrial sites for reproduction, resting, molting, and other activities. Rookeries are terrestrial sites used for mating, giving birth, and resting. Rookeries are primarily used during breeding season (May-August) but can be occupied at other times of the year as well. Haulouts are terrestrial sites used for resting anytime of the year.

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).