| Institution: | 1. Centre for Environment, Fisheries and Aquaculture Science, Burnham Laboratory , Remembrance Avenue, Burnham on Crouch, Essex , CM1 8HA , UK E-mail: frank.thomsen@cefas.co.uk;2. Institut fuer angewandte Fischbiologie GmbH , Elsastrasse 43, 22083 , Hamburg , Germany E-mail: kluedemann@fischbiologie.de;3. Biola, Gotenstrasse 4, D-20097 , Hamburg , Germany E-mail: w.piper@biola.de;4. Centre for Environment, Fisheries and Aquaculture Science, Burnham Laboratory , Remembrance Avenue, Burnham on Crouch, Essex , CM1 8HA , UK E-mail: adrian.judd@cefas.co.uk;5. Bundesforschungsanstalt fuer Fischerei , Palmaille 9, D-22767 , Hamburg , Germany |
