1. National Marine Fisheries Service; Northeast Fisheries Science Center; 166 Water Street Woods Hole MA 02543 USA
2. Hellenic Centre for Marine Research; PO Box 2214 Heraklion 71003 Crete Greece
3. National Marine Fisheries Service; Southeast Fisheries Science Center; Panama City FL 32408 USA
4. Estonian Marine Institute; University of Tartu; Vanemuise 46 51014 Tartu Estonia
5. Polar Research Institute of Marine Fisheries and Oceanography; 6 Knipovich St. Murmansk 183038 Russia
6. Instituto de Investigaciones Marinas; Consejo Superior de Investigaciones Científicas; IIM-CSIC; c/Eduardo Cabello 6 36208 Vigo (Pontevedra) Spain
7. Consiglio Nazionale delle Ricerche Istituto Ambiente Marino Costiero UOS Mazara (CNR-IAMC); Via L. Vaccara no. 61 91026 Mazara del Vallo (Tp) Italy