New study demonstrates effects of cocaine contamination on wild fish behaviour for the first time

Cocaine pollution is changing how juvenile Atlantic salmon move through their environment, making them swim farther and disperse more widely, a new study finds.

The study is the first to demonstrate the effects of cocaine contamination on fish behaviour in the wild, and can help better understand how chemical pollutants influence aquatic animal migration, according to researchers from Griffith University in Australia.

Cocaine and its metabolites are increasingly appearing in rivers and lakes around the world. They mainly enter waterways through wastewater systems that are not designed to fully remove these compounds.