Demonstration of CMP development tuning for Atlantic bluefin tuna

When evaluating Candidate Management Procedures (CMPs), a fundamental trade-off exists between catch performance (what is taken from a fish stock) and biomass performance (what remains after catches). CMPs typically include control parameters that alter how management advice is calculated from data, for example providing higher catches at the cost of less biomass in the long-term. The control parameters of two functionally different CMPs were tuned so that the CMPs obtained comparable biological performance outcomes. In doing so, the performance of the CMPs could be more clearly evaluated on a ‘level playing field’ at the same location on the catch-biomass performance trade-off axis.