The cost of management delay: The case for reforming Mexican fisheries sooner rather than later

Abstract Management reform has the potential to rebuild fisheries and increase long-term harvest and profitability. But timing is critical: delaying reform implementation significantly reduces the potential socio-economic and biological benefits of improved management. This study models the costs of delaying reform in terms of annual biomass, harvest, and profit for 28 Mexican fisheries, parameterized using novel, fishery-specific data. Three types of reforms are examined: 1) harvest policy, 2) elimination of illegal fishing, and 3) implementation of rights-based fisheries management. The harvest policies examined in this analysis are status quo (no reform), F MSY , and economically optimal fishing mortality. The results show that prompt management reforms lead to improved annual aggregate biomass, harvest, and profit over time. However, delaying reform results in substantial costs. Just a 5-year delay of the implementation of comprehensive reform leads to a 51 million USD loss to average annual profits. Without reform, stock status can continue to decline, and the recovery of harvests and profits are further delayed. Over a given time-horizon, delayed reforms can dramatically reduce the number of healthy stocks. The results demonstrate that delayed reform can significantly diminish potential benefits that could be secured through improved management; this highlights the importance of prompt timing considerations during policy reform.