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Remote Pacific islands protect thriving shark populations, but coastal MPAs fail due to weak enforcement and overfishing.
A new study of seven marine protected areas in the Eastern Tropical Pacific finds remote oceanic islands like the Galápagos, Malpelo, Clipperton, and Revillagigedo support thriving shark populations, including endangered species, due to strong protection and isolation.
In contrast, coastal MPAs in Ecuador, Costa Rica, Colombia, and Mexico show drastically reduced numbers of large predatory fish, likely from long-term overfishing and weak enforcement.
Researchers used baited underwater cameras to document healthy shark populations in remote areas, including juveniles suggesting nursery functions, while coastal sites had few shark sightings.
The findings highlight that effective marine protection requires more than just designation—it demands robust enforcement, especially in nearshore zones vulnerable to illegal fishing and pollution.
Las islas remotas del Pacífico protegen a las prósperas poblaciones de tiburones, pero las AMP costeras fracasan debido a la escasa aplicación de la ley y la sobrepesca.