It looks like an April Fool, but unfortunately it is the sad and disconcerting reality. The many drugs used daily end up in the water and current treatments are not equipped to dispose of them. In fact, drugs such as fluoxetine, also known as Prozac, pour into the waterways helping to alter their behavior of the fish.
A research team from the Czech University of Life Sciences in Prague has also found that illegal drugs, such as methamphetamine, can also accumulate in waterways. In the study published in the Journal of Experimental Biology, they demonstrated, through an experiment, how brown trout can be at risk of addiction to illegal methamphetamine present in their waterways.
After submerging the trout in a tank of methamphetamine for eight weeks, the team of scientists transferred the fish to a freshwater tank and tested whether they suffered from withdrawal, offering them a choice between fresh water for several days.
or water containing methamphetamine. All this because if the fish became addicted to methamphetamine, they would feel the effects of withdrawal by looking for the drug whenever it was available. Then studying the choices made by the fish, it was clear to the team that the trout that had spent two months in methamphetamine-contaminated water had become addicted, preferring water containing the drug and suffering from withdrawal during the first four days after transfer to the water.
Furthermore, the addicted fish were far less active than the trout who had never experienced the drug. Pavel Horký, author of the study, said: "It was unclear whether illicit drugs increasingly altered the behavior of fish observed in surface waterways."
Canada: "Heat wave has already killed one billion marine animals"
More than a billion marine animals have died along Canada's Pacific coast, for the last week's record heatwave. Christopher Harley, marine biologist at the University of British Columbia.
Over western Canada and the northwestern United States temperatures up to 50°C, with hundreds of people died in the British Columbia. Harley said: "The shore usually doesn't creak when you walk on it, but now there are so many empty mussel shells scattered everywhere that you can't walk on animals dead.
When temperatures exceed the current ones the conditions become unsustainable." The mass death of crustaceans represents a double alarm, as it would also affect the quality of the water: mussels and clams help filter the sea, Harley recalls, keeping it clear enough so that the light helps to create an ideal habitat also for other species.
Harley added: "A square meter of mussel bed could house several dozen or even a hundred species." . While mussels can regenerate within two years, starfish and clams live for decades and reproduce more slowly: their recovery will therefore take longer.
In that the area seems destined to have to adapt to sudden and prolonged heat waves, the result of climate change. Meanwhile, another heatwave is expected over the western United States and southwestern Canada next week. Harley concluded:"The green and nerdiest part of me is interested in seeing what happens in the next few years.
But the other part of me is worried: many species won't be able to keep up with the pace of change. Ecosystems will change in ways that are really hard to predict. We don't know what the point of no return is."