“Drugs are partially broken down in the treatment process but what we are realizing now is that a lot more gets through than we thought. The treatment plants weren’t designed to break down medicines so some inevitably get concentrated [and] released into streams or onto beaches. Effluent is concentrated in river estuaries and coastal areas, which is where shrimps and other marine life live – this means that shrimps are taking on the excreted drugs of whole towns.
The research team tested the prawns by exposing them to the same level of prozac found in British waters and found that while prawns normally find sanctuary in dark places, these sedated shrimp were five times more likely to swim towards the light becoming more vulnerable to predators. The effects of other pharmaceuticals like hormones, pain relievers, and heart medicine are still unknown.”
Read more: Treehugger











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