ABSTRACT
Tuna Regional Fisheries Management Organisations (tRFMOs) are intergovernmental organisations that are charged with data collection, scientific monitoring and the management of tuna and tuna-like species. The quantification of risk requires estimating the probability of an event occurring and the severity of any consequences. A discussion of risk needs to begin with an understanding of management objectives. In fisheries objectives are represented by target reference points (TRPs), which are used with limit reference point (LRPs) that indicate the state of a fishery or a stock considered undesirable and which should be avoided with high probability. The main management objective when the tRFMOs were established was to achieve the maximum sustainable yield (MSY). This requires maintaining total and adult stock biomass at the levels associated with MSY and fishing mortality at a level that would on average achieve MSY.
