Supporting the development of multiannual plans and preparing for change

Supporting the development of multiannual plans and preparing for change Myfish analysed the sensitivity of the MSY variants to violations of the assumption of constancy and the frequency with which MSY variants must be updated when trends occur in all regions. None of the MSY variants were generally constant over time; the non-directional interannual variability was separated from actual trends to avoid unnecessarily updating reference points where this was not needed. Point-estimates of MSY variants were particularly sensitive to variation and changes in system productivity were shown to have paramount effect on these, decreasing MSY by as much as 69% for some stocks. Ranges of MSY variants providing more than 95% of the average yield for a single stock were shown to operate better in an ecosystem context and moderate variation in underlying processes did not lead to FMSY estimates outside the estimated single species ranges.

Throughout the project, the participants made dedicated efforts to provide the scientific input needed to construct Multiannual Plans replacing the pervious Long Term Management Plans in the revised Common Fisheries Policy. Work has focused on describing the consequences of aiming at different parts of the MSY-realm, on incorporating aspects of sustainability beyond the single stock and on communication with managers and policy makers. The regional case studies have significantly enhanced the possibility of developing informed management approaches. The scientific input to the development of Multiannual Plans has progressed on several levels, depending on the maturity of the plans in the regional areas. In regions where the Multiannual Plans was still in its infancy, potential Multiannual Plans have been designed and discussed with various regional stakeholders. You can see the full document here.

flagsThe research leading to these results has received funding from the European Union’s Seventh Framework Programme (FP7 /2007-2013) under grant agreement no 289257. This publication reflects the views only of the author, and the European Union cannot be held responsible for any use which maybe made of the information contained therein.