Tag: number

Keeping Panthers and People From Colliding

  • Rebecca Galligan with her dogs Roscoe and Sable in their new panther-proof pet house. Galligan and her husband lost their dog Riley to a panther, so they had this enclosure built to keep their pets safe. (Photo by Rebecca Williams)

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

Transcript

People are killing Florida panthers.
Usually it’s not intentional. But
Rebecca Williams reports biologists
are trying to figure out how to keep
panthers and people from running into
each other:

There are only about 100 Florida panthers left in the wild. They’re endangered.

If you live down here, it’s one thing to know there are panthers hunting for food in the Everglades. But it’s something else when they visit your backyard.

(sound of tropical birds singing)

Rebecca Galligan and her husband didn’t give panthers all that much thought. Until one day, when they came home from work, and found their dog Riley had been killed.

“The scratches on the body and the way he’d been killed it was pretty obvious it was some sort of wild cat.”

Two days earlier something had killed their neighbor’s sheep. Then a dozen goats got killed.

A biologist decided the predator was a panther. In the past few years in South Florida, more people have been losing pets and farm animals to hungry panthers.

Galligan calling to dog: “C’mere, have a seat!” (Roscoe sniffs the microphone)

Now, when she’s away, Rebecca Galligan keeps her dogs Roscoe and Sable in a little panther-proof house. It’s made out of steel and chain link fencing.

“There’s so much nature and wildlife, and so I mean, we just can’t destroy it all because we want to be safe. That’s why we had this pen built, so we can keep the animals a little safer from the animals that live around us.”

And a lot of people here think the panthers have a right to stick around.

But some say there’s a gaping hole in the law that’s supposed to protect panthers.

The panther has never had what’s called critical habitat set aside. That means developers don’t have to consider the land panthers need to survive. Panther habitat or not, they can just build.

So panthers are getting crowded out by subdivisions and huge new cities.

Andrew McElwaine is president of the Conservancy of Southwest Florida. He’s asked the Obama Administration to officially give panthers that habitat.

“So, the more habitat we take away, we’re forcing panthers to move out. We’re getting reports of panthers in urban areas of Southwest Florida looking for somewhere to live, if you will.”

And, as people move in, panthers are becoming roadkill.

Last year 10 panthers were killed by cars. So far, this year, six more panthers have been killed.

(sound of cars whizzing by)

“There are some panther tracks here. There’s one there… and there…”

Mark Lotz is a panther biologist. We’re hanging out in an underpass below the highway. It was built for panthers. Miles of fences run along the highway and make a funnel, so panthers have to go below the road.

Lotz says there are 36 panther underpasses on this stretch of highway. And he says fewer panthers get hit here. But underpasses are expensive – about $2 million each. And giving panthers room to live isn’t always even that simple.

Lotz says the biggest challenge is getting people to adapt to panthers. To him, the cats are majestic. But he also knows a lot of people think they’re terrifying. Somebody actually shot a panther a few months ago.

“Naysayers could make the argument there’s no panthers in Pennsylvania or any other eastern state and things are going just fine. But then I would counter – look what’s happening with deer populations there. You know, panthers are part of the ecosystem. Without them there’s just something missing. In a way part of the wildness disappears.”

But if panthers keep running out of space, they could disappear.

We talked to the Secretary of the Interior, Ken Salazar. And we asked him whether he’d set aside critical habitat for panthers.

“Yeah, we’ll have to get back to you on that.”

That’s been the kind of response he’s given to other reporters too.

Giving panthers habitat protection would mean more obstacles for developers. And, in this economy, that could be pretty unpopular.

For The Environment Report, I’m Rebecca Williams.

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Jellyfish Taking Over Oceans?

  • A jellyfish under the Ross Sea ice, on October 14, 2005 (Photo by Henry Kaiser, courtesy of the National Science Foundation)

Some scientists are warning
that as overfishing and climate
change affect the world’s oceans,
jellyfish will take over the
ecosystem. That could mean that
eventually, if you cast a net
into the ocean all you’d haul
in would be jelly blobs. But
as Ann Dornfeld reports, such
warnings may be premature:

Transcript

Some scientists are warning
that as overfishing and climate
change affect the world’s oceans,
jellyfish will take over the
ecosystem. That could mean that
eventually, if you cast a net
into the ocean all you’d haul
in would be jelly blobs. But
as Ann Dornfeld reports, such
warnings may be premature:

The theory goes like this. Overfishing is removing the main jellyfish predators from the oceans. And warming oceans could be more hospitable to jellies.

A new report published in the journal Trends in Ecology and Evolution says jellyfish are already taking over. Its authors point to recent big jellyfish blooms as evidence.

But not everyone’s convinced.

“I think there’s a set of people that are sensationalizing the jellyfish bloom issue.”

University of Washington researcher Claudia Mills has been studying jellies for 30 years.

“I do think that probably jellyfish blooms are on the increase. But the problem is, we have so little baseline data that it’s almost impossible to really, honestly know that.”

Mills says there’s hardly any historical data on jellyfish populations, and not even much recent data.

She says it could be that the future of the world’s oceans is gelatinous and tentacled… or the blooms could just be cyclical.

For The Environment Report, I’m Ann Dornfeld.

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The Case of the Disappearing Dolphin

  • A false killer whale, which is actually a type of tropical dolphin, with calf (Photo by Deron Verbeck, courtesy of iamaquatic.com)

Commercial fishing in the oceans of the US has done a lot to reduce
accidentally catching marine mammals such as dolphins. But there are
still problems. Ari Daniel Shapiro reports on concerns about one kind
of tropical dolphin called the false killer whale:

Transcript

Commercial fishing in the oceans of the US has done a lot to reduce
accidentally catching marine mammals such as dolphins. But there are
still problems. Ari Daniel Shapiro reports on concerns about one kind
of tropical dolphin called the false killer whale:

Jim Cook has been a fisherman in Hawaii for 18 years.

“You know, it used to be real simple: catch a fish, sell it, and go
back out and try and catch another one.”

Now he owns a company that operates six fishing vessels. Cook’s
ships catch deep swimming sashimi-grade tuna that ends up in sushi
restaurants across the US. They use a technique called longline fishing.

“We have around 45 miles of mainline to which we attach floaters
and 2200 to 2500 baited hooks.”

“The regulations imposed on the Hawaii longline fishery are
probably the most restrictive regulations on any longline fishery in the
world.”

That’s Bill Robinson. He’s an administrator with the National
Marine Fisheries Service. And these regulations he’s talking about are
meant to reduce bycatch. That means catching marine animals other than
the tuna. As a result of these policies, sea turtle bycatch has dropped
by more than 90-percent and seabird bycatch by 95-percent.

Things are looking up, but now there’s another problem. The numbers of
another kind of animal – the false killer whale – are declining. No one
knows why they’re disappearing. It might be related to longline
fishing, but it’s just not clear.

Robin Baird’s a biologist with Cascadia Research.

“There’s a whole variety of lines of evidence that imply the false
killer whale population around the main Hawaiian islands has declined
dramatically over the last 20 years. And I think it’s clearly the most
serious conservation or management issue for whales and dolphins in
Hawaiian waters today.”

Baird thinks the decline is partly related to fewer numbers of tuna
and other species false killer whales eat. He also suspects that the
false killer whales might be moving farther offshore, where they could
get hooked when trying to eat the tuna caught by the longline fishery.

So the question is: should the National Marine Fisheries Service come up
with even more regulations for the longline fishery in case more false
killer whales move offshore looking for tuna.

Bill Robinson with the Fisheries Service isn’t so sure that they
actually go that far offshore.

“That’s speculation, and it may or may not be true. What we
don’t really know is what the range of each population is.”

So, really, at this point, it’s anyone’s guess why the false killer whale numbers are declining.

The biologist, Robin Baird, is concerned that nothing’s being done.

“Unless something is done to change the factors that are
influencing the population, it probably will continue to decline.”

The environmental group Earthjustice and a coalition of
conservation groups have sued the National Marine Fisheries Service over
failing to develop a plan to protect the false killer whales.

The agency has not responded officially to the lawsuit yet. But Bill
Robinson says an action plan is in the works.

“Hopefully by the fall, we’ll be able to not only appoint the
team, but have the team begin work on a take recovery plan that will
make recommendations to the agency to reduce the incidental take of
false killer whales in the fishery.”

Such a plan might end up costing the commercial fishers money. But
Jim Cook says he’s willing to pay. That’s because false killer whales
pick fish off his lines. They eat the caught tuna before the fishers
can haul them in. That can mean a lot of lost income.

“We would very much welcome any methodology almost
irrespective of cost because we’re suffering quite a bit economically as
it is.”

But the National Marine Fisheries Service first has to find that
methodology.

For The Environment Report, I’m Ari Daniel Shapiro.

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Tiny Pest Threatens the Las Vegas Lights

  • Hoover Dam's backside stretches more than 700 feet from top to bottom, but the dam's seeing trouble from the tiny aquatic zebra mussel. (Photo by Shawn Allee)

Hoover Dam generates some of the power that lights Las Vegas all night long. But there’s something
that’s making that job a bit more difficult. Shawn Allee found out, it’s a tiny aquatic pest:

Transcript

Hoover Dam generates some of the power that lights Las Vegas all night long. But there’s something
that’s making that job a bit more difficult. Shawn Allee found out, it’s a tiny aquatic pest:

The usual tour of Hoover Dam starts at the visitor’s center – way at the top.

Robert Walsh works with the federal agency that runs Hoover.

He says, go ahead – look over the edge.

Allee: “OK. That’s creepy. Seriously, that’s creepy.”

Walsh: “It’s spooky. Are you afraid of heights?”

Allee: “No, they don’t bother me at all.”

The dam stretches down 700 feet, and it holds an enormous reservoir – Lake Mead.

This tour is awesome, but Walsh says there’s another tour, too.

It’s, um, NOT so awesome.

It’s all about the trouble the tiny quagga mussel is causing Hoover and other nearby dams.

To get that tour, Walsh takes me to Leonard Willet.

Allee: “Where are we right now?”

Willet: “It’s kind of a work station where all the quagga mussel control activities take place
for Hoover Dam.”

Allee: “It’s quagga mussel central for this area?”

Willet: “Exactly.”

Willet first heard quagga mussels were growing in the nearby Lake Mead reservoir in 2007.

He called an expert for advice.

“First thing out of her mouth was, ‘I’m sorry to hear that.’ I knew it was a lot more serious.
And I asked her what we’re in for.”

Willet learned quickly enough – quagga mussels attach to nearly anything underwater.

He shows me a sandal that was in water – and is smothered in them.

They’re like clams the size of your pinky fingernail.

“We went from zero to THAT in seven months.”

And that’s the problem.

Hoover Dam uses water from Lake Mead to spin generators.

The water moves around in pipes – and quagga mussels can attach to them – just like on that sandal.

Allee: “What does that mean in a real practical sense?”

Willet: “Our intake towers would close off. Once you start closing off, you can’t spin the
generators. That’s just kind of the big view of it.”

Zero power generation.

That’s the worst-case scenario. It hasn’t happened – but it’s a fight to prevent it.

“Now, we’re going to go down to the third floor, which is the generator floor.”

The generators are inside broad metal cylinders.

Big water pipes turn the generators. Smaller ones cool them off.

“Well, we circulate cold water from those pipes. If those start to plug up with mussels, then
you can’t keep a generator cool, if those … it shuts down due to overheating.”

Right now, it takes a lot of scraping to keep everything clear.

All this effort’s adding up – Willet says he’ll spend 2 million dollars soon on new equipment.

Even with that, Willet is still a bit jittery about some pipes outside, at the very bottom of the dam.

“The one that’s probably the scariest of all is, we have a fireline that runs around here.
Mussels love it. Then, your firelines, when they’re needed, are plugged with mussels. So
that’s another area you have to really be careful of, safety-wise.”

This didn’t have to happen.

Quagga mussels invaded eastern rivers and the Great Lakes first.

Experts figure the mussels hitched a ride West on someone’s fishing boat.

Apparently – someone didn’t clean their boat properly – and mussels dropped into Lake Mead.

Allee: “When they built this amazing structure during the Depression, do you think they had
any idea that something like this could ever happen?”

Willet: “I think there was a lot of disagreement among professionals that a little mussel the
size of your finger nail could impact a large hydro facility, but we’re quickly learning a bunch
of them can impact water and power delivery.”

Willet says if boaters aren’t careful – they’ll spread quagga mussels to the Pacific Northwest, where
there’re lots of dams and hydro power plants.

After all, if it can happen at mighty Hoover Dam – it could happen anywhere.

For The Environment Report, I’m Shawn Allee.

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Rare Right Whale Recorded

  • Only two Right Whales have been spotted in the last 50 years off the southern tip of Greenland (Photo courtesy of NOAA)

Scientist think they’ve found
a rare whale in a place where
they thought they were wiped
out. Sadie Babits reports,
they haven’t seen the whale
but they’ve heard it:

Transcript

Scientist think they’ve found
a rare whale in a place where
they thought they were wiped
out. Sadie Babits reports,
they haven’t seen the whale
but they’ve heard it:

Scientists thought the North Atlantic Right Whale
was gone. Only two of them have been spotted in
the last 50 years off the southern tip of Greenland.

But some underwater microphones picked up right
whale calls.

“They sound like mmmmmmick… kind of like that.”

That’s David Mellinger. He teaches at Oregon State
University.

He says they recorded more than two
thousand right whale calls in a year. That doesn’t
mean there are a lot of the whales, but Mellinger
says hearing any in the North Atlantic is significant.

“Because the population is so endangered. There
are only 300-350 maybe right whales in the world.
So finding any new whales is important.”

But there is a concern. As the Arctic Ice Cap
melts because of global warming, more ships are
expected to pass through the area. That could
mean ships could strike and kill the few right
whales that are left.

For The Environment Report, I’m Sadie Babits.

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Saving Salmon From Sea Lions

  • Bobby Begay has been patrolling the Columbia River below Bonneville Dam for the past three years, hazing sea lions. (Photo by Sadie Babits)

The Columbia River in the Pacific Northwest historically has been a super highway for salmon. But dams, development, and pollution have taken their toll on salmon. The fish have declined to the point that several species are endangered. Now the salmon face another threat, sea lions. As Sadie Babits reports wildlife managers are trying to get rid of the sea lions to protect the salmon:

Transcript

The Columbia River in the Pacific Northwest historically has been a super highway for salmon. But dams, development, and pollution have taken their toll on salmon. The fish have declined to the point that several species are endangered. Now the salmon face another threat, sea lions. As Sadie Babits reports wildlife managers are trying to get rid of the sea lions to protect the salmon:

Bobby Begay steers his small boat up the Columbia River. He knows this river, and he
knows the salmon. His ties to the salmon go back generations.

As a member of the Yakima Tribe, he comes out here to tribal fishing sites to catch
salmon. It’s something Indians along the Columbia River have been doing for thousands
of years. He says the salmon are considered sacred food.

“It’s part of our livelihood. It’s part of our health and well being.”

They use the salmon to feed everyone from the tribal elders to the children. Tribal
fishermen tell stories of seeing so many salmon in the Columbia River that you could
walk across their backs. Those days are gone.

A series of dams on the river make it hard for fish to get from the Pacific Ocean to fresh
water and back again. The salmon have fallen victim to over-fishing, agricultural
pollution, and habitat destruction. Pacific salmon are now listed as endangered. And they
face yet another threat on the Columbia River – sea lions.

“Sea lions have probably always been in the Columbia but not to this extent and have
done damage to salmon populations like it has and all of it is due because of a man-made
structure, which is Bonneville Dam.”

Sea lion numbers have exploded along the Pacific Coast. And more than a thousand of
them travel up the Columbia River looking for food. Some of them have figured out that
if they gather at the base of Bonneville Dam, they can easily catch salmon that are trying
to pass by.

Biologists estimate that every year sea lions eat some 13,000 salmon. This year, the
federal government gave state wildlife agencies in Oregon, Washington and Idaho, the go
ahead to kill up to 85 sea lions.

Begay won’t really talk about whether he thinks this is right. He’s torn.

“Well, ah, sea lion is a spiritual animal not only to us but to coastal tribes and we respect
the animal as it is, but also the salmon is a scared food to us as Columbia River Indians.”

So Begay works to protect the salmon without killing the sea lions. He works for the
Columbia River Inter-Tribal Fish Commission.

That’s why he’s out here in this boat. He patrols the river most days using fireworks to
scare sea lions away from the salmon.

Crew: “There he is 1 o’clock, 50 yards.”

(sound of gun shots and boat)

Begay’s crew shoots firecrackers over the sea lion.

“And hopefully we’ll get them into the main stem of the river and start hazing them down
stream.”

“The hazing really is not highly effective. The animals are really quick to learn.”

Robin Brown is a marine mammal researcher for the Oregon Department of Fish and
Wildlife.

Brown says they’ve euthanized seven sea lions this year. He says the decision to kill a sea
lion is made after everything else has failed.

“We have to have observed them killing salmon and steelhead, and they have to have
been exposed to all the non-lethal methods of harassment that you’ve observed here
today and shown that that isn’t detouring them from being here and feeding.”

The Humane Society opposes killing the sea lions. It’s asked the courts to put a stop to it.
While this legal battle plays out, Bobby Begay will keep hazing the sea lions until the end
of May.

That’s when the sea lions leave the dam and head back down the Columbia River to the
Pacific Coast to breed.

For The Environment Report, I’m Sadie Babits.

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Bringing a Fish Back From the Brink

  • The American Shad became so rare that hatcheries had to help restore depleted populations (Photo courtesy of the US Fish and Wildlife Service)

A million year old cycle of fish migration almost came to an end in the waters off of the nation’s capital. But a monumental conservation effort has brought them back from the brink. Sabri Ben-Achour explains:

Transcript

A million year old cycle of fish migration almost came to an end in the waters off of the nation’s
capital. But a monumental conservation effort has brought them back from the brink. Sabri Ben-
Achour explains:

I bet you can’t recognize this sound.

It is the sound of a female shad – it’s a type of fish – having its eggs squeezed out into a metal
bowl.

“In the bowl, it looks like applesauce.”
That’s biologist Catherine Lim. We are on a boat in the middle of the Potomac, 20 miles south of
Washington DC, harvesting and fertilizing shad eggs. Lim picks up a male shad and gives it a
squeeze.

“Yeah, he sprayed out there.”

She mixes the brew around and adds water.

“We’ll bag them up and send them to the fish hatchery.”

This is all part of an effort to restore the population of the American Shad. For millions of years,
the large silver-iridescent fish have swum in from the Atlantic and up the rivers of the East Coast
every spring to spawn. They return to the same place where their lives began, guided by a
unique geological odor that seeps from the earth and mountains that feed each river.

Once upon a time – only a century ago – these fish were so numerous they turned the water silver
and made rivers move.

At least that’s what Jim Cummins says, he’s a biologist.

“On the Susquehanna, there were so many of them they created a wave as they came up the
river, a standing wave.”

On the Potomac they fueled entire industries. According to newspaper reports, Washington DC
exported 4 million barrels of salted shad every year in the 1840’s.

“The wagons would come into Georgetown were so heavy that they crammed up the city – I think
it’s the first report of gridlock in Washington.”

The fish fed more than just commerce – they nourish everything from crabs to dolphins. Bald
Eagles actually evolved to time their egg laying early, so their chicks would hatch just as the Shad
and their relatives appeared in the river. And then came overfishing, dams, and pollution.

“In the 1960’s, there were times when the migratory fish came up to spawn in the area and met
that pollution, and hundreds of thousands of them died and made a stinking mess.”

The clean water act was passed in 1972, but by 1980, the fish were almost wiped out. A
moratorium on fishing at the time was too little too late. Water quality gradually improved as
waste water treatment plants were upgraded and aquatic grasses returned. But still, no Shad.

So Cummins began the Shad restoration project.

They had to use several nets – each hundreds of feet long – just to catch one fish. They got help
from fisheries and even elementary schools. Dams were fixed to let fish go around them. The
Shad population exploded.

At a boat house just outside of DC, anglers Steve Bocat and Louis Covax are enjoying success
that up until recently, few alive have seen here.

“It was great we had incredible fishing. I mean, between the two of us, we had, what, 50-60 fish
up to the boat?”

Another sign of success, a pair of Bald Eagles recently returned to the area following the fish –
the first in decades.

For The Environment Report, I’m Sabri Ben-Achour.

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Some States Planning Wolf Hunts

  • In some states, there are plans for a wolf hunting season (Photo courtesy of the US Fish and Wildlife Service)

Some states plan to let people hunt wolves. Rebecca Williams reports that’s happening because the US government is taking gray wolves off the federal endangered species list in two places:

Transcript

Some states plan to let people hunt wolves. Rebecca Williams reports that’s happening because the US government is taking gray wolves off the federal endangered species list in two places:

This decision means states in the western Great Lakes and several Rocky Mountain states will have control over wolves.

Some states are calling wolves a protected nongame species.

For example in Michigan, a wolf can only be killed if it’s attacking people, pets or livestock. But in other states – like Idaho and Montana – there are plans for a hunting season for wolves.

Jonathan Lovvorn is chief counsel for the Humane Society of the United States. His group and several others are planning to sue.

“Essentially what we’re worried about is that this is basically going to be a declaration of open season on animals that have been protected for decades.”

The federal decision to take wolves off the endangered species list could be overturned in court. That happened last fall.

If the decision sticks, then the Fish and Wildlife Service will be keeping an eye on wolf populations for at least the next five years.

For The Environment Report, I’m Rebecca Williams.

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Hard Times for Honeybees

  • (Photo by Scott Bauer, courtesy of the USDA)

Beekeepers are continuing to lose their honeybees. About a third of many beekeepers’ colonies have been dying mysteriously each year for the past several years. Rebecca Williams reports researchers think they’re getting closer to an answer:

Transcript

Beekeepers are continuing to lose their honeybees. About a third of many beekeepers’ colonies have been dying mysteriously each year for the past several years. Rebecca Williams reports researchers think they’re getting closer to an answer:

Honeybees have had some bad luck.

Researchers think there are a couple of things hurting the bees all at once.

They think bees’ immune systems are being weakened.

Maybe because of pesticides. And maybe because bees aren’t getting the variety of food sources they need.

Bees normally collect pollen and nectar from many different plants. But when they’re used on farms, they’re just visiting one kind of plant.

And then on top of that, bees appear to be getting hit by a virus.

Maryann Frazier is a honeybee expert at Penn State University.

She says, until researchers can figure out exactly what’s going on, she expects beekeepers to keep losing a lot of their bees.

“I think what we’re at risk of, more so than the bees dying out, is the beekeepers giving up and not continuing to truck their bees all over the country.”

Beekeepers use honeybees to pollinate about a third of our food supply.

For The Environment Report, I’m Rebecca Williams.

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A Dow Jones Index for Animals

  • Scientists have created a species index that tracks populations much like the Dow Jones (Photo courtesy of the US Fish and Wildlife Service)

Biologists have created a way to
track endangered species that they say is
similar to the way we track financial markets.
Rebecca Williams has more:

Transcript

Biologists have created a way to
track endangered species that they say is
similar to the way we track financial markets.
Rebecca Williams has more:

The new system is nicknamed the Dow Jones Index of Biodiversity.


It’s put together by the International Union for Conservation of Nature and the
London Zoo.


Jonathan Baillie is with the zoo. He says the system helps keep track of which
species are doing well and which ones are close to extinction.


“So if you thought of a group of species like a company you can track what’s
happening to birds through time, what’s happening to mammals through time
what’s happening to amphibians through time – and we’re seeing amphibians
are crashing quite quickly, birds are going down but not as rapidly.”


Of course species can’t be tracked exactly like financial markets. The species
index gets updated every few years instead of every day.


Soon they’re hoping to track things like beetles, mushrooms, and lichens on the
index.


For The Environment Report, I’m Rebecca Williams.

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