North-East Arctic Cod Model

Abstract only.The international council for the exploration of the seas (ICES) publish\ud annual reports on fish stock assessments. Based on the stock assessment\ud data for the North-East Arctic cod we estimate the effective fishing\ud mortality, establishing coefficients for the catchability-at-age and the\ud annual fishing effort. The fishing effort estimates are then used in the\ud estimation of a cost function for the Norwegian harvesting of the stock.\ud Furthermore, we estimate stock-recruitment relationships of the North-East\ud Arctic cod. The recruitment is influenced by climatic conditions at the time\ud of spawning, and we incorporate this by controlling the sea temperature in\ud the stock-recruitment relationship, and found that the stock-recruitment\ud was increasing in the sea temperature at the time of spawning. These and\ud other features will be used in analysis of how climate change affect the\ud stock, the implications for the fisheries with respect to sharing of the stock\ud between Russia and Norway, and the socio-economic consequences of\ud climate change on communities and industry