Science & Data

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.

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

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

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

Aerial, ship, and land-based surveys to count Steller sea lion (Eumetopias jubatus) pups and non-pups on terrestrial rookery and haul-out sites in Alaska were conducted by the Marine Mammal Laboratory (MML) in June to July 2016.