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Forskningsartikel2025Vetenskapligt granskad

Pharmaceutical pollution influences river-to-sea migration in Atlantic salmon (Salmo salar)

Brand, Jack A.; Michelangeli, Marcus; Shry, Samuel J.; Moore, Eleanor R.; Bose, Aneesh P. H.; Cerveny, Daniel; Martin, Jake M.; Hellström, Gustav; McCallum, Erin S.; Holmgren, Annika; Thoré, Eli S. J.; Fick, Jerker; Brodin, Tomas; Bertram, Michael G.

Sammanfattning

Despite the growing threat of pharmaceutical pollution, we lack an understanding of whether and how such pollutants influence animal behavior in the wild. Using laboratory- and field-based experiments across multiple years in Atlantic salmon (Salmo salarn = 730), we show that the globally detected anxiolytic pollutant clobazam accumulates in the brain of exposed fish and influences river-to-sea migration success. Clobazam exposure increased the speed with which fish passed through two hydropower dams along their migration route, resulting in more clobazam-exposed fish reaching the sea compared with controls. We argue that such effects may arise from altered shoaling behavior in fish exposed to clobazam. Drug-induced behavioral changes are expected to have wide-ranging consequences for the ecology and evolution of wild populations.

Publicerad i

Science
2025, volym: 388, nummer: 6743, sidor: 217-222

SLU författare

UKÄ forskningsämne

Etologi
Miljövetenskap

Publikationens identifierare

  • DOI: https://doi.org/10.1126/science.adp7174

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/141583