Beluga whales are distributed throughout seasonally ice-covered arctic and subarctic waters of the Northern Hemisphere and are closely associated with open leads in ice-covered regions. Depending on season and region, beluga whales may occur in both offshore and coastal waters, with concentrations in Cook Inlet, Bristol Bay, Norton Sound, Kasegaluk Lagoon, and the Mackenzie Delta. It is assumed that most beluga whales from these summering areas over winter in the Bering Sea, excluding those found in the northern Gulf of Alaska. Seasonal distribution is affected by ice cover, tidal conditions, access to prey, temperature, and human interaction. During the winter, beluga whales occur in offshore waters associated with pack ice. In the spring, they migrate to warmer coastal estuaries, bays, and rivers for molting and calving. Annual migrations may cover thousands of kilometers. Belugas grow as long as 4.5 m and weigh up to 1500kg. Calves are born in the summer and remain with their mothers for about 24 months. They are slate gray to pinkish brown at birth but become completely white by the time they are adults.
- NOAA's Annual Survey of Cook Inlet Belugas Finds Population at Second-Lowest Level
- 2008 Supplemental Status Review and Extinction Assessment of Cook Inlet Belugas (Delphinapterus leucas)
- Current Research Projects by the Cetacean Assessment & Ecology Program
- Quarterly Reports
- International Polar Year: Pan-Arctic tracking of beluga whales
- Beluga Whale Tagging in Cook Inlet, Alaska, 1999-2003
- SHELDEN, K. E. W., D. J. RUGH, K. T. GOETZ, C. L. SIMS, L. Vate BRATTSTROM, J. A. MOCKLIN, B. A. MAHONEY, B. K. SMITH, and R. C. HOBBS.
2013. Aerial surveys of beluga whales, Delphinapterus leucas, in Cook Inlet, Alaska, June 2005 to 2012. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-263, 122 p. (.pdf 4.67 MB). Online.
- FERGUSON, M. C., and J. T. CLARKE.
2013. Estimates of detection probability for BWASP bowhead whale, gray whale, and beluga sightings collected from Twin Otter and Aero Commander aircraft,1989 to 2007 and 2008 to 2011. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-261, 52 p. (.pdf, 906 KB). Online.
- HOBBS, R. C.
2013. Detecting changes in population trends for Cook Inlet beluga whales (Delphinapterus leucas) using alternative schedules for aerial surveys, 25 p. NTIS number pending. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-252, 25 p. (.pdf, 634 KB). Online.
- EZER, T., J. R. ASHFORD, C. M. JONES, B. A. MAHONEY, and R. C. HOBBS.
2013. Physical-biological interactions in a subarctic estuary: How do environmental and physical factors impact the movement and survival of beluga whales in Cook Inlet, Alaska? J. Mar. Syst. 111:120-129.
- Search the AFSC database for additional Beluga Whale publications
- Real-time Detection of Cook Inlet Beluga Whales for Military Mitigation
8.1 MB Online.
- Spatio-temporal Distribution of Alaskan Beluga (Delphinapterus leucas) Populations Based on Acoustic Monitoring (2014 version)
11.9 MB Online.
- Spatio-temporal Distribution of Alaskan Beluga (Delphinapterus leucas) Populations Based on Acoustic Monitoring
11.9 MB Online.
- Search the AFSC database for additional Beluga Whale posters