Chemicals in the water are mixing up fish's gender (Photo courtesy of US Fish and Wildlife Service)
Scientists already know estrogen from things like ‘The Pill’ is getting into the water and causing reproductive problems for fish. Male fish are picking up female attributes. Some males are even growing eggs. Now a study finds there are other chemicals getting into water that might be messing with fish gender even more. Rebecca Williams reports:
Transcript
Scientists already know estrogen from things like ‘The Pill’ is getting into the water and causing reproductive problems for fish. Male fish are picking up female attributes. Some males are even growing eggs. Now a study finds there are other chemicals getting into water that might be messing with fish gender even more. Rebecca Williams reports:
This study’s found a group of chemicals that block the male hormone testosterone is getting into rivers.
Charles Tyler is the lead author of the paper in the journal Environmental Health Perspectives.
He says they don’t know exactly where these chemicals are coming from, but some medicines and pesticides can block testosterone. So, add that to the estrogen…
“And so it’s very likely they’re going to have interactive and additive effects, if you like, to induce a double whammy on the poor fish.”
Tyler says they don’t know if what’s happening in fish is also happening in people.
Human male fertility has been declining. But there might be other chemicals contributing to the problem.
And besides, there’s a difference. Fish can’t get away from these testosterone blocking chemicals or the estrogen in the water – they live and swim in them. So Tyler says they’re getting a much higher dose.
A study finds farm fields may not be the best environment for toads (Photo courtesy of the US Fish and Wildlife Service)
A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:
Transcript
A new study connects chemicals from
farm fields to mutant toads. Rebecca Williams
has more:
This study looked at toads that live near farm fields and toads that live
near other kinds of not-so-pristine areas like parking lots.
The researchers found in areas with more agriculture – and more farm
chemicals – there were more mutant toads. They found male toads with
both male and female parts. Not ideal when it comes to mating.
Louis Guillette is an author of the study, in the journal Environmental
Health Perspectives.
“It may in fact be a mixture of chemicals along with who knows what
other variables, nutrition, other stressors, that may be leading to these
problems.”
He says next they’ll try to figure out what chemicals are at play, and
exactly how the toads are being turned into hermaphrodites.
In the animal kingdom, a sense of smell is a useful tool. We can tell whether our food is fresh, our clothes are clean… and we might even choose a mate by their scent. Soon, marketers may try to attract your nose to their products. But like too much noise, too many smells may be a turn-off. Great Lakes Radio Consortium commentator Tom Dunkel doesn’t mind that he’ll miss out on this new kind of pollution:
Transcript
In the animal kingdom, a sense of smell is a useful tool. We can tell whether our food is fresh, our clothes are clean… and we might even choose a mate by their scent. Soon, marketers may try to attract your nose to their products. But like too much noise, too many smells may be a turn-off. Great Lakes Radio Consortium commentator Tom Dunkel doesn’t mind that he’ll miss out on this new kind of pollution.
The nose knows more than we think it does. Studies have shown humans secrete the same chemical scents called “pheromones” that trigger things like aggression and mating in the animal kingdom. What does that mean? Well, it means that by mixing the smells of lavender and pumpkin pie, researchers in Chicago were able to sexually arouse a test group of men… a test group of, apparently, very lonely, embarrassed men. Its private industry’s job is to try and cash in on scientific discoveries. Which explains why a patent has been issued for a little device that attaches to a TV, computer, or stereo. The sole purpose of this little gizmo is to generate odors that enhance what we see and hear on our TVs, computers, and stereos. Yes…. It’s the Dawn of Smell-o-Vision! And it’s only a matter of time until it produces a new, annoying form of environmental pollution.
Someday soon grocers will be spritzing supermarket aisles with chocolate-based fumes…. fumes that fill shoppers with a heroin-like craving for Coco Puffs. Airline industry scientists will discover that the combined smell of fruitcake and varnish make passengers actually want to stand in line for hours at ticket counters. We’ll be begging for flight delays. Some future presidential candidate will get catapulted into office by winning the scratch-n’-sniff-campaign-button vote.
Fortunately, I’m going to miss out on this brave, new, environmentally manipulated world. I’m going to miss out because I’m one of about 3 million Americans who have no sense of smell. People like you…. normal people…. enjoy a symphony of 10,000 different odors. My world of smell is a one-note song: ammonia. Eye-watering, sinus-scorching ammonia…the nasal equivalent of having ears that can only hear blood-curdling screams. As handicaps go, I admit I have a minor one. Ragged men don’t stand on street corners mumbling, “Hey, buddy, can you spare a dollar for a guy who’s never smelled fresh-baked bread?” But being born without a sense of smell has very practical, very anxiety producing implications. I have left chicken pot pies baking in the oven all night long…. cooked them no, incinerated them – until a neighbor stopped by to ask if my kitchen was on fire. Likewise, I can’t tell if I’ve worn a suit two times or 20 times. Imagine sitting in a business meeting, brimming over with earth-shattering, big ideas…but convinced nobody will listen to those Big Ideas because you smell like a high school gym locker.
I long ago accepted the fact that my nose can’t distinguish a rose from road kill. But after all these years – not being able to smell has suddenly developed a bright side: No company is going to manipulate my environment. I am totally immune to Smell-o-Vision. Better yet: No matter what those wacky, test-group scientists do, I will never, ever, get sexually aroused by a piece of pumpkin pie.
Many of the rugged explorers, sailors, and travelers of the Great Lakes wrote about their lives. But most of this rich literary history was told by men. Now a new book uncovers another side of Great Lakes’ history: stories by and about women of the Lakes. The Great Lakes Radio Consortium’s Wendy Nelson reports:
Chemicals in the water are mixing up fish's gender (Photo courtesy of US Fish and Wildlife Service)