Myths, zombies and marine protected areas | Mark Costello | TEDxBodø

Quick Overview

Mark Costello argues that many widely held beliefs about Marine Protected Areas (MPAs) are "zombie ideas"—myths that persist despite evidence to the contrary, particularly regarding fishing displacement and economic viability, presenting data showing that fully protected MPAs often increase fishery catches through spillover effects and generate significant tourism revenue.

Key Points: 90% of MPAs do not aim to protect marine life, and only 2% of the ocean is fully protected, indicating a large gap between partially protected and fully protected areas. Evidence from 51 literature examples shows that 90% (46 instances) resulted in fishery benefits (increased catch, body size, or spillover), with zero studies reporting decreased catch due to MPAs. The myth that fishing effort is displaced outside MPAs is false; global data shows fishing effort actually decreased around MPAs due to the 'spillover effect' where fish are caught more quickly nearby. Fully protected MPAs are not radical, expensive, or detrimental to fishing catch; in fact, fully protected areas often yield better outcomes than partially protected zones. MPAs provide significant economic benefits through tourism, generating 30 to 50 jobs per MPA, up to $2.7 million from entrance fees, and up to $7 million from scuba diving alone. Older and larger MPAs provide greater total tourism revenues, demonstrating a positive correlation between MPA age/size and economic benefit. The speaker advocates for a world network of fully protected Marine Reserves, emphasizing that managing these areas well is crucial for securing food, productive fish stocks, biodiversity, healthy ecosystems, and sustainable livelihoods.

Context: Mark Costello delivers a TEDx talk titled "Myths, Zombies and Marine Protected Areas," challenging common misconceptions about the effectiveness and impact of fully protected Marine Protected Areas (MPAs) on local fisheries and economies. The presentation uses data visualizations, particularly graphs comparing protected vs. unprotected areas and a summary table of fishery outcomes, to debunk these persistent 'zombie ideas' and advocate for stronger, fully protected marine reserves as a necessary tool for conservation and sustainable resource management.