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The Amazon’s canary in the coalmine: what a tropical fish can tell us about climate upheaval

Source: The Guardian Published Tue, 03 Nov 2026 12:00:05 GMT
The Amazon’s canary in the coalmine: what a tropical fish can tell us about climate upheaval

Why This Matters

Key context: <p>Scientist Adalberto Luis Val’s pioneering research on the tambaqui fish is revealing the effect of climate disruption in Brazil, with global implications for biodiversity and food security</p><p>As a boy in rural São Paulo, Adalberto Luis Val used to stare into the lake where his father took him fishing and wonder how all those creatures swimming below stayed alive. One day, he netted a few, put them in a jar, and brought them home to observe. The next morning, they were all dead. Val was devastated but intrigued.</p><p>“I needed to know how fish are able to live,” he says.</p> <a href="https://www.theguardian.com/global-development/2026/nov/03/the-amazons-canary-in-the-coalmine-what-a-tropical-fish-can-tell-us-about-climate-upheaval">Continue reading...</a> This development from The Guardian highlights ongoing changes in the sector.

Scientist Adalberto Luis Val’s pioneering research on the tambaqui fish is revealing the effect of climate disruption in Brazil, with global implications for biodiversity and food securityAs a boy in rural São Paulo, Adalberto Luis Val used to stare into the lake where his father took him fishing and wonder how all those creatures swimming below stayed alive. One day, he netted a few, put them in a jar, and brought them home to observe. The next morning, they were all dead. Val was devastated but intrigued.“I needed to know how fish are able to live,” he says. Continue reading...

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