Disaggregating species unit costs in mixed fisheries: the case of the Irish whitefish fleet

Many fishing fleets operate in mixed fisheries where several target species are caught together along with other bycatch unintentionally caught. In some cases, multiple depending on various factors such as time of year or current market conditions, among factors. Data collection the European Union (EU) involves levels detailed data. Economic data is generally collected an annual time-step whereas sources provide information at much higher resolution trip (landings declarations), fish day (logbook) even real-time (electronic logbook). this paper a methodology described to disaggregate cost fleet segment into per fishery and within fishery. This interest it permits incorporation economic implications dynamics management. Assessment these unit costs basis also allows accurate input value chain analysis which carried out basis.