1. Institute for Marine Research (IMR), Pelagic Fish Research Group , PO Box 1870, Nordnes, Bergen 5817, Norway
2. Department of Marine Science , , 310 Castle Street, Dunedin 9016, New Zealand
3. University of Otago , , 310 Castle Street, Dunedin 9016, New Zealand
4. Institute for Marine Research (IMR), Ecosystem Acoustics Research Group, Austevoll Research Station , Sauganeset 16, Storebø 5392, Norway
5. Grótti ehf. , Gundarstíg 4, Reykjavík 101, Iceland
6. University of Bergen (UiB) , PO Box 7803, Bergen 5020, Norway
7. Institute of Marine Research , Department of Marine Ecosystems and Resources, PO Box 1870, Nordnes, Bergen 5817, Norway