First record of the larvae of tanner crab Chionoecetes bairdi in the Chukchi Sea: A future northward expansion in the Arctic?

In the Bering Sea, warming and reduction of summer sea-ice cover are driving species ranges towards the Arctic. Tanner crab, Chionoecetes bairdi, is a commercially important species in the SE Bering Sea with a northerly range margin in 62ºN. In this paper, using plankton samples collected in the Pac...

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Bibliographic Details
Published in:Polar Science
Format: Article in Journal/Newspaper
Language:English
Published: 2018
Subjects:
Global warming
Fishery
Larval transport
Distribution
Connectivity
Arctic
Bering Sea
Bering Strait
Chukchi Sea
Lawrence Island
Pacific
Chukchi
Polar Science
Sea ice
St Lawrence Island
Chionoecetes bairdi
Tanner crab
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=15063
http://id.nii.ac.jp/1291/00014977/
Description
Summary:In the Bering Sea, warming and reduction of summer sea-ice cover are driving species ranges towards the Arctic. Tanner crab, Chionoecetes bairdi, is a commercially important species in the SE Bering Sea with a northerly range margin in 62ºN. In this paper, using plankton samples collected in the Pacific sub-Arctic/Arctic sector during summer, we report for the first time the presence of larval stages (zoea II) of C. bairdi far from its northern limit of the distribution, in the south of St. Lawrence Island during 1991, and even crossing the Bering Strait into the Chukchi Sea during 1992. We suggest that the long planktonic phase (3–5 months), in combination with the oceanographic circulation, may facilitate eventual long-distance transport.

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