close up of tuna swimming in the ocean
Archived Project

Global Tuna Conservation

Tuna are the most commercially valuable fish on Earth and are vital players in healthy ocean ecosystems.

Four species of tuna—bluefin, bigeye, yellowfin, and skipjack—account for at least $42 billion of the $150 billion annual global seafood trade, support millions of jobs, and help ensure food security for some 3 billion people.

But those four species are also in trouble. Heavy fishing has driven the Pacific bluefin population down to a mere 4 percent of what it once was. The widespread use of fish aggregating devices—rafts of material that attract schools of fish—has led to an alarming increase in the catch of juvenile tuna, jeopardizing the chances that some stocks can recover.

This situation is the result of decades of overfishing and mismanagement exacerbated by illegal fishing, which is rampant in some regions. With the huge global demand for tuna, governments and fisheries management bodies must act now to reverse these species’ decline.

Pew worked to improve the international management of tuna species by:

  • Promoting science-based catch limits that do not allow overfishing.
  • Minimizing the impacts of destructive fishing gears.
  • Eliminating illegal fishing.
  • Increasing the transparency and accountability of tuna regional fisheries management organizations.
Issue Brief

A História do Atum Patudo do Atlântico

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Issue Brief

Tudo o que o Atum patudo do Atlântico (Thunnus obesus) faz, fá-lo depressa. Estes atuns atingem a maturidade sexual em apenas dois a três anos e, nesse espaço de tempo, crescem de um tamanho suficientemente pequeno para passarem pelo buraco de uma agulha até um peso superior a 180 kg. São predadores formidáveis, capazes de ultrapassar, apanhar e comer praticamente qualquer coisa que consigam meter na boca. Contudo, o seu tamanho considerável faz deles alvos preferenciais das frotas de pesca de atum em todo o mundo.

Fact Sheet

Medidas de Gestão de DCP Adicionais Necessárias nas Pescarias Internacionais

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Fact Sheet

Pescadores de atum de todo o mundo utilizam dispositivos de concentração de peixes (DCP), objetos flutuantes de fabrico humano por baixo dos quais se juntam muitas espécies, para aumentar as suas capturas. No entanto, estes dispositivos também resultam em grandes quantidades de capturas acessórias e transformam-se frequentemente em detritos marinhos, em grande parte porque as organizações internacionais que regulam estas pescarias aplicam medidas de gestão de DCP limitadas.

Harvest Strategies

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A novel approach, known as “harvest strategies” or “management procedures,” is emerging as the next innovation in fisheries management. 

Global Transshipment

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Transshipment, the transfer of fish or other marine wildlife between a fishing vessel and a carrier vessel at sea or in port, is an important part of the global commercial fishing industry. Valuable tuna species, mackerel, and crabs are among the freshly caught seafood transshipped each day in order to shorten the time it takes to get the fish from the sea to the store. 

Our Work