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