Bowhead whales overwinter in the Amundsen Gulf and Eastern Beaufort Sea

Author:

Insley S. J.12ORCID,Halliday W. D.13ORCID,Mouy X.34ORCID,Diogou N.13ORCID

Affiliation:

1. Wildlife Conservation Society Canada, Whitehorse, Yukon, Canada

2. Department of Biology, University of Victoria, Victoria, British Columbia, Canada

3. School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada

4. JASCO Applied Sciences Ltd, Victoria, British Colombia, Canada

Abstract

The bowhead whale is the only baleen whale endemic to the Arctic and is well adapted to this environment. Bowheads live near the polar ice edge for much of the year and although sea ice dynamics are not the only driver of their annual migratory movements, it likely plays a key role. Given the intrinsic variability of open water and ice, one might expect bowhead migratory plasticity to be high and linked to this proximate environmental factor. Here, through a network of underwater passive acoustic recorders, we document the first known occurrence of bowheads overwintering in what is normally their summer foraging grounds in the Amundsen Gulf and eastern Beaufort Sea. The underlying question is whether this is the leading edge of a phenological shift in a species' migratory behaviour in an environment undergoing dramatic shifts due to climate change.

Funder

Mitacs Elevate Postdoctoral Fellowship

W. Garfield Weston Foundation

Fisheries Joint Management Committee of the Inuvialuit Settlement Region

Publisher

The Royal Society

Subject

Multidisciplinary

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