It is increased activities for searching, test drilling and developing the oil- and gas production in the Barents Sea. In recent years the search for valuable locations has increased and moved further eastward (Figures 18.104.22.168-22.214.171.124).
Seismic activities are known to evoke fear reaction in fish and some marine mammals. Minke whales and harbour porpoises react on distances from 600 to 1000 m away. Some fish species flee the area while other turn passive and stop feeding. Any long-lasting effects are not known.