Skip to main content

Sign up for our newsletter.

Quality journalism. Progressive values. Direct to your inbox.

Fishermen collect fish at Kovalam Beach

Fishermen collect fish at Kovalam Beach on Dec. 11, 2009 in Trivandrum, Kerala, India. (Photo: EyesWideOpen/Getty Images)

Global Warming Decimating World Fisheries—And Studies Warn It's On Track to Get Worse Without Urgent Action

"Adapting to existing climate change effects and implementing the Paris agreement is crucial for the future of the planet's ocean fisheries."

Jessica Corbett

Rising ocean temperatures driven by human-generated greenhouse gases are already damaging the world's fisheries—and that toll is on track to get worse without urgent global action to cut planet-warming emissions.

"We were surprised how strongly fish populations around the world have already been affected by warming, and that, among the populations we studied, the climate 'losers' outweigh the climate 'winners.'"
—Christopher Free, UC Santa Barbara

A pair of new studies published Thursday adds to a growing body of research which warns that anthropogenic global warming poses a mounting threat to both populations of marine fish and the more than 56 million people worldwide who depend on fisheries for survival.

First, a study in the journal Science found that from 1930 to 2010, the maximum sustainable yield—or the amount of fish that can be caught annually without endangering future harvests—fell by about 4.1 percent among the 124 marine species analyzed across 38 ecoregions, with some regions seeings declines as high as 35 percent.

"We were surprised how strongly fish populations around the world have already been affected by warming, and that, among the populations we studied, the climate 'losers' outweigh the climate 'winners,'" Christopher Free, a postdoctoral scholar at UC Santa Barbara who oversaw the research while earning a doctorate at Rutgers University, said in a statement.

Given the impacts Free's team observed—with the most severe losses in productivity seen in the Sea of Japan, North Sea, Iberian Coastal, Kuroshio Current, and Celtic-Biscay Shelf ecoregions—the researchers strongly suggested proactive changes in fisheries management.

"We recommend that fisheries managers eliminate overfishing, rebuild fisheries, and account for climate change in fisheries management decisions," Free said. "Policymakers can prepare for regional disparities in fish catches by establishing trade agreements and partnerships to share seafood between winning and losing regions."

He added that "knowing exactly how fisheries will change under future warming is challenging, but we do know that failing to adapt to changing fisheries productivity will result in less food and fewer profits relative to today."

Adapting to climatic changes is important to the future of fisheries—but so is addressing the root cause of those changes, as was highlighted by another study published in Science Advances.

"Adapting to existing climate change effects and implementing the Paris Agreement is crucial for the future of the planet’s ocean fisheries, while facing the growing challenges of supporting healthy and peaceful societies into the future."
—Rashid Sumaila, UBC

After comparing potential consequences for fisheries if warming hits 1.5°C above pre-industrial levels—the 2015 Paris agreement's end-of-century benchmark—versus the 3.5°C anticipated under a "business as usual" emissions scenario, researchers concluded that pursuing the global climate accord's top goals is "crucial" to safeguarding ocean ecosystems and economies of nations that are highly dependent on the fishing industry.

"Achieving the agreement is projected to increase sustainable global fish catches of the top revenue-generating fish species studied by 7.3 percent per year or 3.3 million metric tons," according to the study—and about 90 percent of that increase would occur in the territorial waters of developing country waters.

"The largest gains will occur in developing country waters, such as Kiribati, the Maldives, and Indonesia, which are at greatest risks due to warming temperatures and rely the most on fish for food security, incomes and employment," explained Rashid Sumaila, lead author of the study and a professor at the University of British Columbia (UBC).

The Science Advances report points out that marine fisheries provide about 260 million full- and part-time jobs worldwide—notably in nations such as India, Indonesia, and Nigeria—and that "seafood products remain a critical export commodity for many developing countries."

"A steady supply of fish is essential to support these jobs, food sovereignty, and human well-being," Sumaila said. "Adapting to existing climate change effects and implementing the Paris Agreement is crucial for the future of the planet's ocean fisheries, while facing the growing challenges of supporting healthy and peaceful societies into the future."


Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.

We've had enough. The 1% own and operate the corporate media. They are doing everything they can to defend the status quo, squash dissent and protect the wealthy and the powerful. The Common Dreams media model is different. We cover the news that matters to the 99%. Our mission? To inform. To inspire. To ignite change for the common good. How? Nonprofit. Independent. Reader-supported. Free to read. Free to republish. Free to share. With no advertising. No paywalls. No selling of your data. Thousands of small donations fund our newsroom and allow us to continue publishing. Can you chip in? We can't do it without you. Thank you.

'Egregious': Pennsylvania Court Strikes Down Mail-In Voting Law

The ruling was stayed pending an appeal to the state's Supreme Court and as one voting advocate put it: "The fight's not over yet, folks."

Julia Conley ·


Big Win for Open Internet as Court Upholds California Net Neutrality Law

One legal advocate called the Ninth Circuit's opinion "a great decision and a major victory for internet users in California and nationwide."

Kenny Stancil ·


Poll Shows Majority in US Want Diplomacy, Not War With Russia Over Ukraine

The survey's findings echo the pleas of progressive lawmakers, who assert "there is no military solution" to the crisis involving the world's two foremost nuclear powers.

Brett Wilkins ·


'Abortion Bans Kill People': Death of Woman Unleashes Protests in Poland

"The politicized tribunal has caused hell for women in Poland that must end as soon as possible—before another one of us dies."

Jessica Corbett ·


Clyburn Asks: Who Would Oppose Means-Testing Child Tax Credit? Answer: Lots of People

"There is literally not a single thing that the means-tested approach is better at than the universal approach," said one policy expert.

Jake Johnson ·

Support our work.

We are independent, non-profit, advertising-free and 100% reader supported.

Subscribe to our newsletter.

Quality journalism. Progressive values.
Direct to your inbox.

Subscribe to our Newsletter.


Common Dreams, Inc. Founded 1997. Registered 501(c3) Non-Profit | Privacy Policy
Common Dreams Logo