[1] Tech Univ Denmark, Natl Inst Aquat Resources, DK-8600 Silkeborg, Denmark
[2] Norwegian Inst Nat Res NINA, NO-7485 Trondheim, Norway
[3] CEFAS, Lowestoft NR33 0HT, Suffolk, England
[4] CFB, Dublin, Ireland
[5] Fisheries & Oceans Canada DFO, Inst Maurice Lamontagne, Mont Joli, PQ G5H 3Z4, Canada
[6] Univ Laval, IBIS, Quebec City, PQ G1V 0A6, Canada
[7] Microwave Telemetry Inc, Columbia, MD 21045 USA
[8] ICES, DK-1553 Copenhagen V, Denmark
[9] Univ British Columbia, W Vancouver, BC V7V 1N6, Canada