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The highly interconnected small-world network of fisheries, a study says June 27,2019   |  Source: European Scientist

It is indeed a small world after all. The world’s marine fisheries form a “small-world network” and every year, over $10 billion worth of fish are caught in countries outside the ones in which they are spawned, according to a new study published on 20 June in Science (1). Fisheries are typically managed on a national level as a local resource. More than 90 per cent of the world’s fish is caught within a few hundred kilometres extending off the shores of coastal nations. However, the world’s fisheries are highly interconnected and form what the authors refer to as a “small-world network”.

The researchers from the University of California, Berkeley, the London School of Economics, and the University of Delaware, led by Oceanographer Dr Nandini Ramesh, brought together expertise in oceanography, fish biology, and economics to explore the international connectivity of more than 700 commercially fish species harvested within almost 250 national fishing grounds.

More specifically, they used computer simulations based on particle tracking to build a global network of fish larval dispersal by modelling how eggs and larvae of hundreds of fish species travel around the world via ocean currents before they can swim. The simulation was based on the life cycles of

Theme(s): Post Harvest Technology and Trade, Others, Fisheries Development and Aquaculture, Fisheries Resources, Communities and Organisations, Fishing Craft, Gear and Fishing Methods, Freshwater ecosystems and threats, Landing Centres, Coastal Ecosystems and Threats.

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