Salmon exposed to cocaine swim almost twice as far, study shows

A recent study by scientists from Griffith University in Australia and the Swedish University of Agricultural Sciences has revealed that wild Atlantic salmon exposed to cocaine and its metabolite, benzoylecgonine, swim significantly longer distances than those not exposed. Conducted in Sweden’s Lake Vattern, the research found that drug-exposed salmon traveled nearly twice as far as their unaffected counterparts. This study highlights the growing issue of drug pollution in waterways, with cocaine use rising globally and drugs increasingly found in aquatic environments. Researchers warn that such pollution poses a significant threat to biodiversity, emphasizing the need for improved wastewater treatment and monitoring. The study also aligns with other findings, such as sharks in the Bahamas and Brazil testing positive for cocaine and other substances, underscoring the widespread environmental impact of human-derived drugs. QUESTION: How might the presence of drugs in waterways affect the ecosystems and food chains that rely on these environments?