Elizaveta Ershova, UiT The Arctic University of Norway, Tromsø, Norway, Ksenia N. Kosobokova, Russian Academy of Sciences, P.P. Shirsov Institute of Oceanology, Moscow, Russia, Neil Banas, University of Strathclyde, Glasgow, United Kingdom, Barbara Niehoff, Alfred Wegener Institute, Polar Biology, Bremerhaven, Germany, Nicole Hildebrandt, Alfred Wegener Institute, Germany and Ingrid Ellingsen, SINTEF Ocean, Trondheim, Norway