Update of Indian Ocean Bigeye Tuna MSE

This paper is an update of the Indian Ocean Bigeye Tuna Management Strategy Evaluation work. Given the recommendations of both the 2021 WPTT and Scientific Committee, we tuned the reduced set of two candidate MPs to the B2 and B3 risk criteria, with the tuning years now being defined as 2034-2038. Updated catch estimates were used to generate the 3-year average that is used to define catches taken between the last year of reported catch data and prior to the 2023 implementation of the MPs. The most influential robustness trials from the previous work (recruitment shock, longline catchability trend) were also useful for outlining the contrasts between the two candidate MPs and two tuning risk criteria combinations. As in previous evaluations, the largest differences in performance are between the tuning risk criteria. Results are very comparable to the previous suite of runs, with only very minor changes to early catch trajectories given the required extension of the tuning period.