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Large, Open Ocean MPAs Distract from More Pressing Ocean Issues

May 15, 2018 — Effective conservation requires thoughtful decision-making to successfully navigate complex issues involving food, livelihood, and preservation. Fishery management is conservation in practice as it tries to ensure that fish for food and enjoyment persist indefinitely. However, the tools chosen for the job have implications for the environment and the people using it. There are limited resources to devote to a myriad of issues, and most decisions have winners and losers. With any conservation objective, each potential management tool should be critically evaluated to consider externalities and alternatives. No-take MPAs that restrict all fishing can be the right tool for conservation and management, but not always.

Recently, many global conservation leaders have called for a dramatic increase in the amount of no-take MPA coverage worldwide, mainly through large, open-ocean marine protected areas (LOOMPAs). Touting these immense MPAs as the pinnacle of ocean protection is popular right now, but fails to acknowledge the social and biological shortcomings of LOOMPAs and, crucially, is a poor use of political capital. Understanding and accounting for the critiques of LOOMPAs will make fisheries and ocean conservation better.

Prudent, coastal MPAs are good

MPAs function by restricting fishing in an area of the ocean. If well enforced, they are an effective management tool for specific coastal habitats, like coral reefs, which need healthy fish populations to function properly. Coral reefs are also extremely delicate; preventing harmful fishing practices can greatly benefit the ecosystem. Fortunately, commercial fishing is less reliant on coral reefs than other ocean habitats.

MPAs that protect seagrass meadows and kelp forests along the coast can also work to mitigate climate change and ocean acidification as seagrasses and kelp are the oceans’ greatest carbon sinks, sequestering more carbon per acre than terrestrial forests. Proper protection would restrict damaging fishing gear to keep the underwater forests and meadows intact.

Large, Open Ocean MPAs are contentious, biologically.

Large, open ocean MPAs (LOOMPAs) are designed to protect huge swaths of open ocean, but are a poor choice for efficiently and effectively managing fisheries. The idea is that by restricting fishing in such a large area, highly migratory fish that travel across the open ocean (like tuna) will have better opportunities to grow and reproduce. However, highly migratory fish are just that—highly migratory. Tuna populations move thousands of miles; in and out of LOOMPAs, EEZs, and the high seas.

Read the full story at Sustainable Fisheries UW

 

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