[1] IMARES Inst Marine Resources & Ecosyst Studies, POB 167, NL-1790 AD Den Burg, Texel, Netherlands
[2] Ctr Sauvegarde Faune Sauvage & Musee Nat, Le CHENE, 12 Rue Musee, F-76190 Allouville Bellefosse, France
[3] Norduri Sundum 7, FO-410 Kollafjordur, Faroe Islands
[4] FEO Viewforth, Orkney KW17 2NR, Scotland
[5] Kermouroux, FR-56470 St Philibert, France
[6] Univ Kiel, Res & Technol Ctr West Coast FTZ, Hafentorn 1, D-25761 Busum, Germany
[7] Nat Hist Museum Skagen, Skagen Nat Ctr, Flagbakkevej 30, DK-9990 Skagen, Denmark
[8] Univ Aberdeen SOTEAG, Virkie ZE3 9JN, Shetland, Scotland
[9] Geilini 37, FO-270 Nolsoy, Faroe Islands
[10] Grp Ornithol Normand, F-76700 Gonfreville Lorcher, France
[11] Faroe Marine Res Inst, Futalag 40, FO-100 Torshavn, Faroe Islands
[12] Postveien 43, N-4563 Borhaug, Norway
[13] Skagen Uddannelsesctr SUC, Vestmolen 15, DK-9990 Skagen, Denmark
[14] Res Inst Nat & Forest, Klin Str 25, B-1070 Brussels, Belgium
[15] 9 Haswell Gardens, North Shields NE30 2DP, Tyne & Wear, England