Jonathan Lambert

Yeah. But even with super low concentrations, like what a fish would encounter in the wild, these drugs are still altering their behavior in the lab.

Yeah. But even with super low concentrations, like what a fish would encounter in the wild, these drugs are still altering their behavior in the lab.

So researchers put these like slow-release capsules into the bodies of over 250 juvenile hatchery-raised Atlantic salmon. The capsules released two drugs, a benzodiazepine called Clobazam, used to treat anxiety, and an opioid used for pain management called Tramadol.

So researchers put these like slow-release capsules into the bodies of over 250 juvenile hatchery-raised Atlantic salmon. The capsules released two drugs, a benzodiazepine called Clobazam, used to treat anxiety, and an opioid used for pain management called Tramadol.

So researchers put these like slow-release capsules into the bodies of over 250 juvenile hatchery-raised Atlantic salmon. The capsules released two drugs, a benzodiazepine called Clobazam, used to treat anxiety, and an opioid used for pain management called Tramadol.

In humans, these drugs can cause harmful interactions, and so the researchers wanted to see if combining them had, like, extra bad effects.

In humans, these drugs can cause harmful interactions, and so the researchers wanted to see if combining them had, like, extra bad effects.

In humans, these drugs can cause harmful interactions, and so the researchers wanted to see if combining them had, like, extra bad effects.

They're also found in lots of rivers around the world, but not in the river where these particular salmon live.

They're also found in lots of rivers around the world, but not in the river where these particular salmon live.

They're also found in lots of rivers around the world, but not in the river where these particular salmon live.

Yeah, yeah, exactly. Overall, they had four different treatments. No drug, only Clobazam, only Tramadol, and both.

Yeah, yeah, exactly. Overall, they had four different treatments. No drug, only Clobazam, only Tramadol, and both.

Yeah, yeah, exactly. Overall, they had four different treatments. No drug, only Clobazam, only Tramadol, and both.

They also implanted these tracking devices so the scientists could follow the fish as they migrated from a release site in a Swedish river out to the Baltic Sea.

They also implanted these tracking devices so the scientists could follow the fish as they migrated from a release site in a Swedish river out to the Baltic Sea.

They also implanted these tracking devices so the scientists could follow the fish as they migrated from a release site in a Swedish river out to the Baltic Sea.

Not exactly. They were like little devices that emit a sound. And then the researchers placed a bunch of receivers along the migratory route that pick up that sound, allowing them to kind of like reconstruct the journey.

Not exactly. They were like little devices that emit a sound. And then the researchers placed a bunch of receivers along the migratory route that pick up that sound, allowing them to kind of like reconstruct the journey.

Not exactly. They were like little devices that emit a sound. And then the researchers placed a bunch of receivers along the migratory route that pick up that sound, allowing them to kind of like reconstruct the journey.