Maximum sustainable yield from interacting fish stocks in an uncertain world: two policy choices and underlying trade-offs

摘要: The case of sheries management illustrates how the inherent structural instability ecosystems can have deep-running policy implications. We contrast eleven types plans to achieve maximum sustainable yields (MSY) from multiple stocks and compare their eectiveness based on results strategy evaluations (MSE) that use complex food webs in operating models. Plans primarily target specic stock sizes ( BMSY) consistently led higher than targeting shing pressures FMSY). A new type selfoptimising control rule, introduced here conquer uncertainty due instability, intermediate yields. \maximise yield each separately" sense a Nash equilibrium produced total comparable maximise harvested biomass, but tended be more robust instability. Most outperformed single-species set pressure targets without explicitly considering ecological interactions. Our analyses highlight trade-os between yields, amiability fair negotiations, continuity with current approaches European context. Based these results, we recommend directions for future developments EU policy.