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Search resuls for: "Rachel Ann Hauser"


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Not Afraid of Sharks? Well, Now They’re on Cocaine.
  + stars: | 2024-07-24 | by ( Sarah Hurtes | ) www.nytimes.com   time to read: +1 min
If the prospect of sharks lurking just off the beach wasn’t frightening enough, researchers in Brazil have discovered a new reason to be unnerved: Some of them have cocaine in their system. In a study published last week, researchers tested 13 sharks off the coast of Rio de Janeiro and found that all had traces of cocaine in their liver and muscle tissues. The levels of cocaine found in these sharks were reported to be as much as 100 times higher than in previously observed marine life. It’s the first time this data has ever been found for any top predator.”This was the first study to analyze cocaine in sharks, following various studies on smaller species, including mollusks, crustaceans and even eels. All 13 sharks examined were found to have unfiltered cocaine in much higher concentrations than in previous studies on other animals, indicating chronic exposure to the drug.
Persons: , , Rachel Ann Hauser Davis Organizations: Oswaldo Cruz Foundation Locations: Brazil, Rio de Janeiro
Sharks in Brazil test positive for cocaine, say scientists
  + stars: | 2024-07-23 | by ( Jack Guy | ) edition.cnn.com   time to read: +4 min
CNN —Sharks living off the coast of Brazil have tested positive for cocaine, according to new research, the first time that the drug has been detected in free-ranging sharks. Cocaine levels were around three times higher in muscle tissue than liver tissue, according to the study, while female sharks had higher cocaine concentrations in muscle tissue compared to males. Cocaine consumption has risen massively around the world in recent decades, according to the study. Increased consumption and poor sewage treatment infrastructure has made for increased cocaine levels in the sea, say researchers. Hauser Davis said that it is “very likely” that crustaceans, fish and other animals that the sharks prey on are also contaminated with cocaine.
Persons: Rachel Ann Hauser, Davis, Enrico Mendes Saggioro, Mendes Saggioro, , Rachel Ann Hauser Davis, Hauser Davis, , Pavel Horky Organizations: CNN — Sharks, Oswaldo Cruz Foundation, CNN, Czech University of Life Sciences, Puget Sound Locations: Brazil, Rio de Janeiro, South America, Mexico, Florida, Prague, United Kingdom, Washington
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