The Barents Sea is the continental shelf north of the Scandanavian peninsula. Cod stocks in the Barents Sea are influenced both by fishing and by climate. The production or recruitment of cod (bars in top figure, below), is thought to be related to the flow of warm water into the Barents sea from the North Atlantic Ocean. A recruitment increase occurred in the mid-1970s and 1990s, when there were warm ocean temperatures north of Scandanavia (the Kola Peninsula), shown by the red curve in the middle figure below. Capelin are a food source for cod and whales. Capelin biomass shows large variability over the last twenty-five years.