Paradox of marine protected areas: Suppression of fishing may cause species loss

Nao Takashina, Akihiko Mougi, Yoh Iwasa

研究成果: Contribution to journalArticle査読

25 被引用数 (Scopus)


A number of fish and invertebrate stocks have been depleted by overexploitation in recent years. To address this, marine protected areas (MPAs) are often established to protect biodiversity and recover stocks. We analyzed the potential impact of establishing MPAs on marine ecosystems using mathematical models. We demonstrate that establishment of an MPA can sometimes result in a considerable decline, or even extinction, of a species. We focus on a prey-predator system in two patches, one exposed to fishing activity and the other protected (MPA). Our analyses reveal that the establishment of the MPA can cause a reduction in prey abundance, and even extinction of the prey. Such unintended consequences are more likely to occur if the predator species is a generalist and if the MPA is intended to protect only the predatory species. Further, a mobile predator that migrates adaptively rather than randomly is associated with a greater reduction in prey abundance.

ジャーナルPopulation Ecology
出版ステータス出版済み - 7 1 2012

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

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