[1] Tech Univ Denmark, Natl Inst Aquat Resources, Dept Marine Ecol & Aquaculture, DK-2920 Charlottenlund, Denmark
[2] Aarhus Univ, DK-2920 Charlottenlund, Denmark
[3] Univ Wales Bangor, Sch Ocean Sci, Anglesey, Wales
[4] Inst Marine Resources & Ecosyst Studies, Wageningen IMARES, NL-1970 AB Ijmuiden, Netherlands
[5] Ctr Environm Fisheries & Aquaculture Sci, Lowestoft Lab, Lowestoft NR33 0HT, Suffolk, England
[6] Tech Univ Denmark, Natl Inst Aquat Resources, Dept Inland Fisheries, DK-8600 Silkeborg, Denmark
[7] Inst Marine Res, N-5817 Bergen, Norway
[8] IFREMER, Nantes, France
[9] Univ Tartu, Estonian Marine Inst, EE-80031 Parnu, Estonia