University Study: Pills Flushed Down Drains Are ‘Making Fish Transgender’

20% percent of male fish are now transgender because of chemicals from the contraceptive pill being flushed down toilets.

More than twenty percent of male fish are now transgender because of chemicals from the contraceptive pill being flushed down toilets and household drains, according to a study by Exeter University.

Male river fish are displaying feminised traits and even producing eggs, the study conducted by the British university found. Many have reduced sperm quality and display less aggressive and competitive behaviour, which makes them less likely to breed successfully with female river fish.

The chemicals causing these effects include ingredients in the contraceptive pill, by-products of cleaning agents, plastics and cosmetics, according to the findings, raising fears about what these ingredients are doing to human males.

Telegraph reports:

Professor Charles Tyler, of the University of Exeter, is to present his findings in a key-note lecture at a symposium this week. He will explain that the offspring of such “transgender” or “intersex” fish can also be more sensitive to the effects of these chemicals in subsequent exposures.

Professor Tyler said: “We are showing that some of these chemicals can have much wider health effects on fish that we expected.

“Using specially created transgenic fish that allow us to see responses to these chemicals in the bodies of fish in real time, for example, we have shown that oestrogens found in some plastics affect the valves in the heart.”

transgender-fish
Chemicals from the pill are turning fish transgender; what are these chemicals doing to us?

Tests showed 20 per cent of male freshwater fish, such as roach, at 50 sites had feminine characteristics.

More than 200 chemicals from sewage plants have been identified with oestrogen-like effects and drugs such as antidepressants are also altering fish’s natural behaviour, his study found.

Other research has shown that many other chemicals that are discharged through sewage treatment works can affect fish, including antidepressant drugs that reduce the natural shyness of some fish species, including the way they react to predators,” Professor Tyler said.

transgender-fish
Professor Charles Tyler observing fish in his aquarium.

Professor Tyler will present his findings in the opening lecture of the 50th Anniversary Symposium of the Fisheries Society in the British Isles at Exeter University from July 3 to 7.

Dr Steve Simpson, who has organised the symposium, said the week of talks would give “fish biologists from around the world a chance to exchange ideas and discuss how to protect dwindling fish populations in rapidly changing seas and rivers, before it is too late.”

Other research to be discussed at the event includes how the destruction of coral reefs and their distinctive sounds means fish are getting lost in the water, how fish are shrinking because of climate change and how power cables can disrupt how fish find sexual partners.

Baxter Dmitry

Baxter Dmitry

Baxter Dmitry is a writer at Your News Wire. He covers politics, business and entertainment. Speaking truth to power since he learned to talk, Baxter has travelled in over 80 countries and won arguments in every single one. Live without fear.
Email: baxter@yournewswire.com
Follow: @baxter_dmitry
Baxter Dmitry
  • John Rykken

    Well anyway, that bit of research should make the leftists happy. Isn’t this what they have been working for everywhere?
    But, the researchers will soon find themselves looking for work because they have said a really bad word. Know what I mean?

  • Singing Whale

    Sounds like a payroll is being seriously padded.

  • Sleeveheart

    Other research to be discussed at the event includes how great fish taste, even if they dress funny.