1. Department of Animal and Plant Sciences; University of Sheffield; Alfred Denny Building, Western Bank Sheffield S10 2TN UK
2. Centre for Ocean Life; National Institute of Aquatic Resources; Technical University of Denmark; 2920 Charlottenlund Slot Charlottenlund Denmark
3. Centre for Environment, Fisheries and Aquaculture Science (CEFAS); Lowestoft Laboratory; Lowestoft Suffolk NR33 0HT UK
4. Maritime Affairs Unit; Institute for the Protection and Security of the Citizen; European Commission Joint Research Centre; Ispra Varese Italy
5. IMARES; University of Wageningen; PO Box 68 1970 AB IJmuiden the Netherlands
6. School of Environmental Sciences; University of East Anglia; Norwich NR4 7TJ UK