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ICES Journal of Marine Science: Journal du Conseil 2004 61(6):972-982; doi:10.1016/j.icesjms.2004.07.021
© 2004 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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Stock structure of Atlantic cod (Gadus morhua) in West Greenland waters: implications of transport and migration

Marie Storr-Paulsena,*, Kai Wielanda, Holger Hovgårdb and Hans-Joachim Rätzc

a Greenland Institute of Natural Resources PO Box 570, 3900 Nuuk, Greenland
b Danish Institute for Fisheries Research Charlottenlund Slot, 3920 Charlottenlund, Denmark
c Federal Research Center, Institute for Sea Fisheries Palmaille 9, 22767 Hamburg, Germany

*Correspondence to M. Storr-Paulsen: tel: +299 361200; fax: +299 261212. e-mail: rie{at}natur.gl.

Atlantic cod in West Greenland waters have varied greatly in abundance and distribution in the past decades. Strong year classes yielded good catches inshore and offshore in the late 1980s, but since then cod have been nearly absent offshore and the inshore fishery has been depressed, though there has been a small increase inshore over the past few years. Different components contribute to the Greenland cod stock, and re-analysed tagging experiments indicate that migration behaviour differs between them. Inshore cod are sedentary, with almost no migration between different fjord systems. In contrast, there are many cases of alongshore migration of cod tagged on the offshore fishing banks. Further, observations have been made of occasional migrations from offshore to inshore, notably so in years of good recruitment originating from Icelandic waters.

Keywords: Atlantic cod, Greenland, homing, migration, spawning area, stock structure, tagging

Received 8 December 2003; accepted 26 July 2004.


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