1. Atmosphere and Ocean Research Institute, The University of Tokyo; 5-1-5 Kashiwanoha Kashiwa Chiba 277-8564 Japan
2. IFREMER, Avenue Jean Monnet, BP171; 34203 Sète Cedex France
3. National Institute of Aquatic Resources, Technical University of Denmark; Charlottenlund Denmark
4. Maurice-Lamontagne Institute, Fisheries and Oceans Canada; Mont-Joli Québec G5H 3Z4 Canada
5. Thünen Institute of Fisheries Ecology; Hamburg Germany
6. School of Marine Sciences, University of Maine; Orono ME U.S.A.