Self-financed marine protected areas

Marine protected areas (MPAs) are an important tool for conservation but can be victims of their own success-higher fish biomass within MPAs create incentives to poach. This insight underpins the finding that fishing persists in most MPAs worldwide, and it raises questions about MPA monitoring and enforcement. We propose a novel institution to enhance MPA design-a 'Conservation Finance Area (CFA)'-that utilizes leased fishing zones inside of MPAs, fed by spillover, to finance monitoring and enforcement and achieve greater conservation success. Using a bioeconomic model we show that CFAs can fully finance enforcement, deter illegal fishing, and ultimately maximize fish biomass. Moreover, we show that unless a large, exogenous, and perpetual enforcement budget is available, implementing a CFA in a no-take MPA would always result in higher biomass than without. We also explore real-world enabling conditions, providing a plausible funding pathway to improve outcomes for existing and future MPAs.

Automated summary

Marine protected areas are important for conservation, but the increase in fish biomass within MPAs creates incentives for poaching. Fishing activities persist in most MPAs worldwide, raising concerns about monitoring and enforcement. A proposal for a Conservation Finance Area (CFA) utilizes leased fishing zones within MPAs to finance monitoring and enforcement, leading to greater conservation success.