Affiliation: | aFederal Research Centre for Fisheries, Institute for Sea Fisheries, Palmaille 9, D-22767 Hamburg, Germany bUniversity of Hamburg, Institute of Hydrobiology and Fishery Science, Olbersweg 24, D-22767 Hamburg, Germany cUniversity of Tromsø, Norwegian College of Fishery Science, N-9037 Tromsø, Norway dInstitute of Marine Research, P.O. Box 6404, N-9294 Tromsø, Norway eUniversity of Bergen, Department of Biology, P.O. Box 7800, N-5020 Bergen, Norway fInstitute of Marine Research, P.O. Box 1870, Nordnes, N-5817 Bergen, Norway |