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. 2019 Jun 21;364(6446):1192-1196.
doi: 10.1126/science.aav3409.

The small world of global marine fisheries: The cross-boundary consequences of larval dispersal

Nandini Ramesh  1 , James A Rising  2 , Kimberly L Oremus  3
Affiliations

The small world of global marine fisheries: The cross-boundary consequences of larval dispersal

Nandini Ramesh et al. Science. .

Abstract

Fish stocks are managed within national boundaries and by regional organizations, but the interdependence of stocks between these jurisdictions, especially as a result of larval dispersal, remains poorly explored. We examined the international connectivity of 747 commercially fished taxonomic groups by building a global network of fish larval dispersal. We found that the world's fisheries are highly interconnected, forming a small-world network, emphasizing the need for international cooperation. We quantify each country's dependence on its neighbors in terms of landed value, food security, and jobs. We estimate that more than $10 billion in annual catch from 2005 to 2014 is attributable to these international flows of larvae. The economic risks associated with these dependencies is greatest in the tropics.

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