Stock structure of Icelandic cod Gadus morhua L. based on otolith chemistry

I. G. Jónsdóttir*, S. E. Campana, G. Marteinsdottir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Otolith chemistry was used to study the stock structure of Icelandic cod Gadus morhua. Otoliths were collected from spawning cod at 12 and 17 different spawning locations around Iceland during the spawning season in 2002 and 2003, respectively. The otolith elemental composition of cod spawning north and south of Iceland differed substantially from each other, as did spawning cod below and above 125 m depth at the main spawning ground in the south of Iceland. Otolith chemistry differed more between locations than among years within a location, indicating temporal stability between the 2 years. The Icelandic cod stock is managed as a single stock. These results suggest, however, that optimal fisheries management may require different management units than are currently present.

Original languageEnglish
Pages (from-to)136-150
Number of pages15
JournalJournal of Fish Biology
Volume69
Issue numberSUPPL. C
DOIs
Publication statusPublished - Dec 2006

Other keywords

  • Cod
  • Gadus morhua
  • Otolith chemistry
  • Stock structure

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