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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Wasp Kills Pines

  • The Sirex woodwasp is killing pinetrees in New York, Pennsylvania and parts of Ontario and seems to be spreading. (Photo by Lester Graham)

Foresters are worried about a wasp that’s killing pine trees. The insect is
spreading through pine forests in northern states. Steve Carmody reports:

Transcript

Foresters are worried about a wasp that’s killing pine trees. The insect is
spreading through pine forests in northern states. Steve Carmody reports:


The female Sirex woodwasp injects a combination of a toxic mucus and a
fungus while laying her eggs in pine trees. The mixture feeds the eggs, but
kills tree cells, often further weakening stressed pines.


In the three years since it first appeared in upstate New York, the Sirex
woodwasp has spread to 25 New York counties, and two counties in
Pennsylvania and part of Ontario.


Bob Heyd, with the Michigan Department of Natural Resources, says the Sirex
woodwasp is spreading:


“The wasp is actually very strong fliers. They can fly 70 or 100 miles, so what it
is here… it will disperse very quickly.”


In other countries, forestry officials have found an imported predatory
nematode from the wasp’s home range in Europe has been an effective
biological control. It’s unclear if officials in the US will try the same
tactic.


For the Environment Report, I’m Steve Carmody.

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Plastics Chemical Causes Defects

A new study finds low doses of a chemical used in plastics increases developmental
defects in mice. Rebecca Williams reports the study adds to the growing body of
research that has some scientists wondering if there are human health effects:

Transcript

A new study finds low doses of a chemical used in plastics increases developmental
defects in mice. Rebecca Williams reports the study adds to the growing body of
research that has some scientists wondering if there are human health effects:


The chemical’s called bisphenol A. It’s used to make everything from plastic baby bottles
to the lining of food cans.


The researchers exposed pregnant mice to the chemical. They found that the female
babies those mice were carrying were more likely to have eggs with chromosome defects.
So it’s a three-generational effect. Exposure in the pregnant female mouse increases the
likelihood her grandchildren will have defects.


Patricia Hunt is an author of the study, published in the Public Library of Science
Genetics. She notes this is an animal study and humans are more complex:


“But we also need to bear in mind that this is one chemical of many that have these
effects, they can mimic the actions of hormones in the body.”


Hunt says there’s a growing level of concern among scientists that the developing fetus
might be especially sensitive to chemicals that mimic hormones.


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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Controlling Feral Cat Colonies

Cats are the nation’s most popular household pets. But despite this, millions of cats are abandoned each year. These free-roaming cats grow up without much human contact. They live in cat colonies near apartment buildings, strip malls, or anyplace else where food scraps get tossed into dumpsters or trash cans. And they have an impact on the environment as they compete with other wildlife for food and shelter. The Great Lakes Radio Consortium’s Rick Pluta has this report:

Transcript

Cats are the nation’s most popular household pets. But despite this, millions of cats are abandoned each year. These free-roaming cats grow up without much human contact. They live in cat colonies near apartment buildings, strip malls, or anyplace else where food scraps get tossed into dumpsters or trash cans. And they have an impact on the environment as they compete with other wildlife for food and shelter. The Great Lakes Radio Consortium’s Rick Pluta has this report:


It’s late at night and Donna Dunn and a couple of friends are sitting in a parked car in a suburban Detroit cemetery.


They’re smoking, eating fast food, and waiting for cats.


“There’s the pregnant female, right there under the truck…”


They’re hoping the cats wander into one of the dozens of live traps they’ve set up. The prize catch is a pregnant female.


“What’d you get? Is it a girl? Yeah, it’s a girl… a pregnant female. Yes! Alright!….”


Donna Dunn is a veterinary technician, who learned about feral cats through her job. She hooked up with a sprawling network of thousands of feline lovers who take care of feral cats living in cat colonies.


Dunn figures there are about 75 wild or abandoned cats wandering the grounds of this cemetery. Some of the cats live in tunnels burrowed in the dirt, or in buildings on the cemetery grounds. Wild cats can also live in vacant buildings or abandoned vehicles. And, Dunn figures, there would soon be a lot more cats if something wasn’t done about it.


“One female will have a minimum of two litters a summer, average litter is five kittens per litter. So you’re looking at 10 kittens average per female in here. The first nine females we took out of here, eight were pregnant. That would’ve produced 40 kittens.”


(Sound of trap)


The trapped cats will spend the night in cages stacked side-by-side in a volunteer’s garage. They’ll go the vet’s in the morning, before they are returned to their feral cat colony. Donna Dunn says the neutered cats are more content, and less likely to fight with other cats and wild animals.


She says “trap, neuter, and release” is a humane alternative to turning strays over to a shelter, where most of the cats would be killed.


But “trap, neuter, and release” is also controversial idea. Critics say it doesn’t really address the problem of feral cats roaming the streets. They say it’s simply not possible to sterilize millions of these cats.


Eileen Liska is with the Michigan Humane Society. She says wild cats have a profound effect on the environment. They can upset the ecological balance of a field or a neighborhood by killing off birds and other wildlife. They can also carry feline leukemia and other diseases. Liska says euthanizing un-adoptable felines is the most compassionate approach.


“Cats living out in the streets equals suffering. I mean, they are suffering. They don’t have proper food sources. They’re exposed to the weather and they’ve got the danger of being attacked, injured or killed by other wildlife, especially when they’re fighting for the same ecological niches. The cats absolutely are in competition with possums, skunks, and raccoons, and raccoons can grow quite large and be quite aggressive and we know that they kill cats that come, that get in their way.”


But Liska also says the growing number of wild cats shows the current approach isn’t working. She wants to raise more money to fund new animal control programs. But she’s not finding a lot of support for a tax to do that among Michigan’s politicians.


Michigan, like most states, requires dogs to be on a leash or fenced in when they’re outside. Farmers demanded the laws at the beginning of the twentieth Century because wild canines were attacking livestock.


There’s no similar cry yet to do something about feral cats, and no one seems to think that licensing cats would begin to get at the problem. Wisconsin proposed allowing hunters to shoot strays. That idea was tabled after animal rights groups protested.


“Right there. See it? Right out here. That’s a little one. Judy, is there food in there? Should I check it?”


Donna Dunn and her friends would like to see every state to adopt trap-neuter-and-release for dealing with stray cats. Until then, she says, her cohorts will try and deal with the problem one cat colony at a time.


For the GLRC, this is Rick Pluta.

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States Aim to Draw in Women Hunters

  • Michigan DNR Director Rebecca Humphries gets some coaching on her target shooting skills from her teenage daughter, Jenny Humphries. Jenny shoots clay pigeons competitively. (Photo by Sarah Hulett)

If you look at the average hunting camp, you’d see about six men for every woman. But some state officials want that to change. They think getting more women and girls into the shooting sports will help turn around declining sales of hunting licenses. And they say that will help shore up state funds that pay for conservation. The Great Lakes Radio Consortium’s Sarah Hulett reports:

Transcript

If you look at the average hunting camp, you’d see about six men for every woman. But
some state officials want that to change. They think getting more women and girls into
the shooting sports will help turn around declining sales of hunting licenses. And they
say that will help shore up state funds that pay for conservation. The Great Lakes Radio
Consortium’s Sarah Hulett reports:


“Okay, ladies… Is everybody done dry firing? All right. Safety on, actions open. The
coach will insert one round into the chamber…”


Today is the first time Abby Wood has ever shot a gun. Abby’s 13 years old, and she’s at
a mid-Michigan shooting range with about a dozen other daughters and their moms for a
day of gun safety instruction and target shooting.


Abby loads and shoots five rounds. Then she and her mom, Ann Miller, walk downrange
to check out her target.


“I got ’em all on the target, and they’re sort of in the same area. But they’re a little off.
And I got one really close to the bull’s eye, I’m kinda proud of that. (Ann:) I thought we
did great.”


The Michigan Department of Natural Resources put on this mother-daughter event as a
way to get more women and girls interested in target shooting and hunting. Like many
states, Michigan is seeing a slow decline in hunting license sales – about one percent a
year. And some worry that if that trend continues, it could hurt the state’s ability to pay
for conservation programs and to keep its wild deer herd in check.


Lynn Marla coordinates a state program that puts on workshops for women to develop
their outdoor skills. She says of all the outdoor sports, hunting is the most difficult
activity to get women interested in.


“It’s basically ‘never been invited. Never been taught.’ I mean, I know a man who’s my
age and he had three daughters and a son. And he never even thought to ask his
daughters.”


But some states are extending invitations to women and girls who want to learn to shoot
and hunt. The Becoming an Outdoors Woman program – or BOW – started in Wisconsin
in the early 1990s. BOW is now in 43 states, seven Canadian provinces, and New
Zealand. Every year, about 20-thousand women spend a weekend hunting, fishing, and
learning other outdoor activities like paddling and orienteering.


Christine Thomas is BOW’s founder, and a professor at the University of Wisconsin. She
says it’s important to get different kinds of people interested in outdoor activities.


“Because – especially as budgets shrink, but really anytime – as people have less of a tie
to the natural resources, they are less likely to care what happens to them. So from a
standpoint of political support for fish and wildlife programs, environmental protection, I
think it’s important to get lots of people involved. And women and girls are some of
those people.”


At the rifle range, Mart McClellan says she didn’t grow up around hunters, and she used
to be opposed to hunting. But she says working with people who hunt has changed her
attitude, and she’s interested in trying it.


“You know, it seems like in the past, from my perspective, it’s been such a sexist kind of
sport…that doesn’t need to be. And I think a lot of women and girls get intimidated.
Because you know you hear the stories about deer camp, it’s all the guys, and guy
bonding. So I think this will kind of combat that stereotype. And hopefully get more
women out hunting.”


This is the Michigan Department of Natural Resources’ first shooting event for women
and girls. Abby Wood – the teenager who’s shooting for the first time – says she likes
target shooting – and she thinks she might want to try hunting too. And after a day on the
shooting range littered with rifle shells, she’s got some ideas about what she might want
to wear to deer camp.


“I want to make earrings out of the leftover shells…”


For the GLRC, I’m Sarah Hulett.

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