Negro River study finds genetic damage in fish after oil spill

Negro River Study Finds Genetic Damage in Fish After Oil Spill

On March 26, 2013, approximately 60,000 liters of an oil byproduct spilled from a barge on the Negro River, near the São Raimundo Harbor in Manaus.

When researcher Helen Sadauskas-Henrique saw the news, she canceled her Easter plans and rushed to the site to collect samples.

I had already conducted lab tests on the effects of oil exposure on fish in the Negro River, but I’d never observed anything like this in the natural environment.

Sadauskas-Henrique, now a professor at Santa Cecília University, recalls the incident as "all very fast and intense".

Author's summary: Oil spill causes genetic damage in fish.

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Mongabay News Mongabay News — 2025-10-20

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