Water Pollution Feminizing Fish

  • 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.

For The Environment Report, I’m Rebecca Williams.

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Farm Chemicals Mixing Up Toads’ Sex

  • 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.

For The Environment Report, I’m Rebecca Williams.

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Indoor Shrimp Farming: A New Market?

  • Russ Allen breeds and grows thousands of shrimp in a barn in his backyard. The entire process is contained. There's no water coming in or going out, and there's no waste leaving his farm. (Photo by Corbin Sullivan)

Recently, shrimp surpassed tuna as the most-consumed seafood in the United States. Most of the shrimp Americans eat is produced in Southeast Asia, India, Mexico and Brazil. Russ Allen wants to change that. He’s opened one of the world’s few indoor shrimp farms in the Midwest. Allen says his operation meets an obvious market demand, is good for the environment, and presents a new economic opportunity for the country. The Great Lakes Radio Consortium’s Erin Toner reports:

Transcript

Recently, shrimp surpassed tuna as the most-consumed seafood in the
United States. Most of the shrimp Americans eat is produced in
Southeast Asia, India, Mexico and Brazil. Russ Allen wants to change
that. He’s opened one of the world’s few indoor shrimp farms in the
Midwest. Allen says his operation meets an obvious market demand, is
good for the environment, and presents a new economic opportunity for
the country. The Great Lakes Radio Consortium’s Erin Toner reports:


In a big blue barn in Russ Allen’s backyard, there are thousands of
shrimp… beady-eyed, bacteria-munching, bottom-feeders.


Here, the life cycle of the shrimp starts in the breeding center, where
two big tanks of water mimic a place 150 feet deep off the shore of the
ocean where the water quality and temperature are stable. Allen says
it’s the perfect environment for shrimp to mate.


“Like in just about all animals the male chases the female, and they do a
little courtship dance, and then the male will deposit a spermatophore on
the female and when she spawns, the eggs pass through the
spermatophore, are fertilized and then go out into the water.”


A few months later, the shrimp end up in the production room where all
they do is eat, and sometimes, if they get excited or spooked, they jump
right out of their tanks.


“They don’t like light…”


“Oh (laughing)! Do you ever have them hit you as you’re standing
here?”


“Oh yeah, that’s why we have the nets up so they don’t jump.”


Russ Allen has been farming shrimp for three decades. He started in
Ecuador, and then went to Belize, where he started the country’s first
shrimp farms.


Allen and his wife moved back to Michigan in 1990, when he started
designing his indoor shrimp farm. It finally opened for business about a
year ago, and now, he’s selling all the shrimp he produces.


(Sound of shrimp market)


Allen says his indoor shrimp farm is one of the first of its kind in the
world. There’s no waste leaving his farm, so pollution’s not an issue,
and because there’s no water coming in or going out, there’s no danger
of introducing diseases into his system.


Allen says an indoor farm also moves shrimp farming away from fragile
coastal ecosystems. That’s where most of the industry has developed
around the world.


“In a place like the United States with all the development on the
coastline and land costs, you can’t really do it anywhere near the ocean
anyway. So, if you’re going to have a viable shrimp farming system in
the United States, you need to move it away from – you know – these coastal areas.”


But indoor farms haven’t always been a viable option, either.


In the 1980s, a handful of them opened in the U.S., including a big one in
Chicago. They all failed because the technology didn’t work quite right,
and because the cost of production made them unable to compete with
outdoor farms.


Bill More is a shrimp farming consultant and vice president of the
Aquaculture Certification Council. He says now, indoor shrimp farmers
have a better chance of making a go of it.


“Coming from third-world countries, there’s been a lot of issues with
illegal antibiotics being found in shrimp. There’s been environmental
and social issues that environmentalists have come down hard upon. It’s
sort of prompted the opportunity for a good indoor system where
you could manage those and you didn’t challenge the environment.”


But More says creating and maintaining a clean, organic indoor shrimp
farm is still very expensive, and it seems an even bigger problem now
that the price of shrimp is the lowest it’s been in a decade.


Shrimp farmer Russ Allen says he’s invested several million dollars in
his business. He’s the only guy in the game right now, which he
admits is good for business, but he doesn’t want it that way. He says
he’d like to see the industry grow in Michigan, and throughout the
country.


“In order to do that the government has got to be a partner in this, and
that has been the challenge… that when you don’t have an industry, you
don’t have lobbyists and nobody listens to you and you can’t get an
industry until they do listen to you. So, that’s been our real challenge
right now.”


Allen says he wants the government to offer tax breaks and other
financial assistance to the aquaculture industry like it does to other
sectors of the economy, but he says he can’t even get some local elected
officials to come and see his shrimp farm. He says with so many
companies moving jobs and factories overseas, he thinks government
leaders should be looking for ways to help new and perhaps
unconventional industries like his, grow.


For the GLRC, I’m Erin Toner.

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Phthalate Concerns Cause Company Makeovers

  • Women marching on behalf of a campaign to remove phthalates and other chemicals from cosmetics. (Photo courtesy of the Breast Cancer Fund)

There are new concerns that products we use every day to keep us clean and make us beautiful may contain toxic chemicals. The targets are things like shampoos, deodorants, hair dyes and cosmetics. Some companies are taking these concerns seriously and giving themselves a makeover. The Great Lakes Radio Consortium’s Julie Halpert has this story:

Transcript

There are new concerns that products we use every day to keep us clean and make us beautiful may contain toxic chemicals. The targets are things like shampoos, deodorants, hair dyes and cosmetics. Some companies are taking these concerns seriously and giving themselves a makeover. The Great Lakes Radio Consortium’s Julie Halpert has this story:


(Sound of woman and child talking)


Teri Olle is playing dress-up with her two-year-old daughter, Natalie, in the family’s bathroom. Teri is applying lotions to her daughter’s chubby cheeks, while Natalie puts lipstick on her mother.


Little girls like Natalie have been playing dress-up for generations. But Natalie’s game is slightly different. She’s using nail polish, lipsticks and creams made without man-made chemicals.


That’s because her mother is an environmental activist who lobbies against toxic chemical use. With cosmetics, her biggest fear is a group of chemicals called phthalates. Phthalates increase the flexibility of plastic and keep nail polish from chipping.


“Phthalates are testosterone-suppressing synthetic hormones, essentially. And they’ve been linked with all sorts of developmental problems, including, most dramatically, a set of male genital defects that show themselves as birth defects in infant boys.”


Last month, scientists released the first study on male babies. They found a strong link between high levels of phthalates exposure in pregnant women and damage to their sons’ reproductive tract. Studies like this, and others on lab animals showing possible links to reproductive problems, prompted the European Union this past March to ban two types of phthalates from all products sold in Europe. The states of California, New York and Massachusetts are also considering similar plans.


Olle is five months pregnant with her second child. She doesn’t know if she’s carrying a boy, but she says chemicals in cosmetics could be risky for any fetus. So she’s not taking any chances.


“For me, as a person, if someone said to me, ‘You can either use this product that may cause a genital defect in your baby boy or not’, I would think most people would go, ‘Really, we probably shouldn’t be using these products.'”


And it’s not just phthalates that could be a problem. Environmentalists say that the ingredients in cosmetics haven’t been evaluated for health or safety effects. The Food and Drug Administration doesn’t do that kind of testing. And in 60 years, it’s banned only nine ingredients. So there are other chemicals, like coal tars used in hair dyes and formaldehyde used in nail polish, that might cause health problems as they’re absorbed by the skin into the bloodstream.


Because of these concerns, a group of environmentalists called the Campaign for Safe Cosmetics has convinced 136 natural cosmetics companies to sign a pledge to check for potentially toxic chemicals and eliminate them.


One of those companies is Avalon Organics. Over the past year, Avalon’s spent two and a half million dollars to reformulate their products and switch to more natural alternatives. Gil Pritchard is the company’s President and CEO. He says the jury’s out on whether these chemicals definitely cause harm. Even so, he didn’t hesitate to make the investment.


“It’s convincing enough for me and our company to exercise what we call a precautionary principle – to adopt it and say look, we may not have direct scientific evidence, but there’s enough evidence here to say whoa, I can feel the heat from the stove. I don’t need to put my finger on and burn myself to know that that’s one of the likely outcomes.”


But not all companies feel this way. Procter & Gamble, in Cincinnati, Ohio, has not signed the pledge. Nor have any other major cosmetic companies. Tim Long is a company spokesman. He says environmentalists are blowing this issue way out of proportion.


“The amounts of most of these ingredients that the activists have concerns about are, in fact, extremely small and at the doses used in our products, there’s no scientific evidence to support that they’re resulting in any harm to consumers.”


Long says Procter & Gamble complied with the EU directive and took the banned phthalates out of all of its products both in Europe and the U.S. But he says that wasn’t necessary, since phthalates, along with all other cosmetic ingredients, simply aren’t dangerous. He says his company wouldn’t be using them if they were. And the FDA says that these cosmetics are safe.


Environmentalists say that more research needs to be done to better understand the effect of chemicals used in cosmetics on the body. But Teri Olle says that with so many natural alternatives available, it makes sense to be careful.


“When I became pregnant, I definitely became more conscious of what I was putting on my body. I mean, if you’re supposed to avoid soft cheeses and cake batter, it certainly can’t be good for you to be spraying petrochemicals on your body. That definitely can’t be good for the baby.”


So when the baby’s born this September, instead of using products with man-made chemicals, Teri Olle will be spreading diaper rash ointment with beeswax and apricot oil on her newborn baby.


For the GLRC, I’m Julie Halpert.

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Luring an Invasive Fish With Pheromones

A scientist has discovered a chemical compound that attracts
an invasive fish. The Great Lakes Radio Consortium’s Mike Simonson
reports that this could be a breakthrough in controlling harmful fish
populations:

Transcript

A scientist has discovered a chemical compound that attracts an invasive fish. The
Great Lakes
Radio Consortium’s Mike Simonson reports that this could be a break through in
controlling
harmful fish populations:


Eurasian ruffe were introduced in the Duluth-Superior harbor from ballast water of
ocean-going
ships in the 1990’s. Ruffe reproduced so quickly, they now make up 80 to
90-percent of the fish
population, squeezing out native fish. Now, they’re spreading eastward across Lake
Superior
toward the lower Great Lakes.


University of Minnesota Fisheries Professor Peter Sorenson says he’s isolated a
pheromone that
will cause the fish to cluster in great numbers of male ruffe who are tricked into
thinking it’s time
to mate.


“It causes a great deal of sexual arousal and excitement. So to help detect this
thing, I suppose
like a dog they get a little crazy and just start swimming around like crazy and
nudging and
inspecting the fish in the tank.”


Once they’re clustered, Sorenson says it may be possible to find a way to cut their
population.
Sorenson hopes to find a similar pheromone in carp and sea lamprey, other invasive
species
which threaten native fish in the Great Lakes.


For the Great Lakes Radio Consortium, I’m Mike Simonson.

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