Review of 2021 WPTT Indian Ocean yellowfin tuna stock assessment and feasibility of alternative assessment

Recent IOYT Assessment. The most recent Indian Ocean Yellowfin Tuna (IOYT) stock assessment (Fu et al 2021) estimated the 2020 IOYT stock as slightly overfished at 78% of BMSY, with 68% probability that overfishing occurring (fishing mortality at 127% of FMSY). These results are found by integrating over a grid of 96 equally weighted stock assessment models (Stock Synthesis v3) that are intended to span the range of plausible states of nature for the IOYT stock.