1. NOAA Fisheries (retired), Marstons Mills, MA 02648, USA
2. Department of Aquatic Resources (SLU-Aqua), Swedish University of Agricultural Sciences, Lysekil 45321, Sweden
3. Centre for Environment, Fisheries and Aquaculture Science (Cefas), Lowestoft Laboratory, Lowestoft, Suffolk NR33 0HT, UK
4. Institute of Marine Research, Ecosystem Acoustics Group, Austevoll Research Station, Storebø 5392, Norway
5. Australian Institute of Marine Science, Cape Cleveland, 4810 QLD, Australia
6. Instituto Español de Oceanografía (IEO), Balearic Oceanographic Centre, Ecosystem Oceanography Group (GRECO), Palma 07015, Spain
7. AZTI—Marine Research Division, Sukarrieta, Bizkaia 48395, Spain
8. University of Salford, Ecosytems and Environment Research Centre, Salford M5 4WX, UK