The Northwest Passage Opens for Bowhead Whales

… already connecting whales … assumed to be separated by sea ice.”


The loss of Arctic sea ice is predicted to open up the Northwest Passage, shortening shipping routes and facilitating the exchange of marine organisms between the Atlantic and the Pacific oceans. Here, we present the first observations of distribution overlap of bowhead whales (Balaena mysticetus) from the two oceans in the Northwest Passage, demonstrating this route is already connecting whales from two populations that have been assumed to be separated by sea ice. Previous satellite tracking has demonstrated that bowhead whales from West Greenland and Alaska enter the ice-infested channels of the Canadian High Arctic during summer. In August 2010, two bowhead whales from West Greenland and Alaska entered the Northwest Passage from opposite directions and spent approximately 10 days in the same area, documenting overlap between the two populations.

  1. Mads Peter Heide-Jørgensen1,*,
  2. Kristin L. Laidre2,
  3. Lori T. Quakenbush3 and
  4. John J. Citta3

Author Affiliations

  1. 1Greenland Institute of Natural Resources, Nuuk, Greenland
  2. 2Polar Science Center, APL/University of Washington, Seattle, WA, USA
  3. 3Alaska Department of Fish and Game, Fairbanks, AK, USA

*Author for correspondence (

  • Received July 18, 2011.
  • Accepted August 31, 2011.


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