Affiliation: | Scottish Association of Marine Science, Dunstaffnage Marine Laboratory, Oban, Argyll, PA37 1QA, UK; Fisheries Research Services, Marine Laboratory, 375 Victoria Road, Aberdeen, AB11 9DB, UK; Faroese Fisheries Laboratory, Box 3051, FO-110, Torshavn, Faroe; Geophysical Institute, University of Bergen, NO-5014, Bergen, Norway |