1. Institute of Marine Research, Nordnes, Bergen, Norway
2. Akvaplan-niva AS, Fram Centre, Tromsø, Norway
3. Department of Arctic and Marine Biology, University of Tromsø, Tromsø, Norway
4. Department of Economics and Business, Universitat Pompeu Fabra, & Barcelona Graduate School of Economics, Barcelona, Spain
5. Institute of Marine Research, Tromsø, Norway