Tag: aquarium

Captive Otters Adopt Orphaned Pups

  • Now that surrogate moms raise the otters, the goal is for the pups to never see or hear a human. To get up close to the pup, Ann had to put on a Darth Vader costume of sorts. (Photo by Angela Hains)

For animals in most zoos and
aquariums, the door from freedom
to captivity only swings one way.
But at the Monterey Bay Aquarium,
sea otters from its exhibits teach
wild sea otter orphans how to
survive in the ocean. Ann Dornfeld
has the story:

Transcript

For animals in most zoos and aquariums, the door from
freedom to captivity only swings one way. But at the
Monterey Bay Aquarium, sea otters from its exhibits teach
wild sea otter orphans how to survive in the ocean. Ann
Dornfeld has the story:

Rosa has her baby in a headlock. That’s actually how
southern sea otters hold their young.

“The pup is essentially unconscious – it’s very much
asleep, and Rosa is holding it as a female would in the
wild: she’s got it sort of teed off to her side with a paw
around its neck.”

Andy Johnson is the director of the Monterey Bay
Aquarium’s Sea Otter Research and Conservation
program.

By the end of the19th century, sea otters had been hunted
to extinction in some parts of the Pacific.

Lilian Carswell is with the U.S. Fish and Wildlife Service.
She says these days, pollution and disease are sea otters’
biggest threats. And she says a lot of other species
depend on otters’ survival.

“Sea otters are important for a number of reasons. One is
that they’re a top predator in the nearshore marine
ecosystem and they play an important role in structuring
what that ecosystem looks like.”

Hungry sea otters keep sea urchin populations in check.
When urchins overpopulate an area, they can mow down
entire kelp forests that provide food and shelter for
hundreds of species.

So to help conserve the otter population, Andy Johnson
and his team at the Monterey Bay Aquarium pair orphaned
pups from the wild with the female exhibit otters. The goal
is for the surrogate mother to not only care for the pup, but
also to teach it all the skills it will need to be released back
into the wild at about six months old.

A volunteer has just tossed some food into the pool where
Rosa and the orphaned pup are swimming. Rosa grabs
the live crab as the pup watches.

“Rosa’s quite skilled with those, so she’ll pretty much take
that apart in a few minutes. We’ll have to watch the pup
and see if the pup approaches the crab without getting
pinched. I have to admit it’s quite amusing to see these
young animals confronting these crabs ’cause these crabs
are pretty formidable on their own.”

Rosa ends up breaking off a leg for her adopted pup, who
decides the shell is too much work. Before long, though,
the pup will learn some of the same impressive skills that
adult sea otters have – like how to use tools to open clams
and sea urchins.

Before the surrogate program began, workers and
volunteers used to hand-rear these pups. They’d even
take the pups swimming in Monterey Bay to acclimate
them to their future home.

But that made the released otters expect food from
boaters and other people they encountered in the bay.

Now that surrogate moms raise the otters, the goal is for
the pups to never see or hear a human. We’ve been
watching the sea otters interact from a TV monitor near
the pool. To get up close to the pup, I have to put on a
Darth Vader costume of sorts – starting with a huge black
nylon poncho.

(sound of the poncho)

Ann: “This is a welding mask?”

Andy Johnson: “A very cheap welding mask.”

Rosa isn’t fooled. As I approach the pool, she shoots over
to see whether I have food.

(sound of the otter sniffing around)

Rosa was a rescued pup. She was hand-reared before the
surrogate program began. After she was released into
Monterey Bay, she had to be recaptured because she was
jumping on kayaks and divers.

“We found that with the sea otters, putting them with an
adult female in a fairly shallow pool for six months far
outweighs whatever we were doing trying to raise these
pups.”

Sea otter populations are recovering at a slow pace in
California. But this program is contributing to the
population.

Johnson says the apparent survival rate of the re-released
pups is now about as good as that of newly-weaned pups
in the wild. Some have even successfully raised their own
pups, using skills they picked up from an exhibit otter at
the aquarium.

For The Environment Report, I’m Ann Dornfeld.

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Saving Frogs From Extinction

Scientists warn that we’re in the middle of a mass extinction. Frogs,
toads and other amphibians are dying off at an alarming rate. Rebecca
Williams reports a group of scientists wants to build an ark to stop
the extinctions:

Transcript

Scientists warn that we’re in the middle of a mass extinction. Frogs,
toads and other amphibians are dying off at an alarming rate. Rebecca
Williams reports a group of scientists wants to build an ark to stop
the extinctions:


In the last few decades, hundreds of amphibian species have gone
extinct. And several thousand more are on the verge of extinction.
One major threat is a killer fungus that’s wiping them out. Other
threats are habitat destruction and pollution.


A group called Amphibian Ark has announced a 40 million dollar plan.
They want to build special facilities at zoos and aquariums around the
world to take in endangered amphibians and keep them alive.


Kevin Zippel is the group’s amphibian program officer:


“The amphibian extinction crisis is probably the greatest species
conservation challenge in the history of humanity in terms of the
number of species in one group that’s being impacted.”


Zippel says putting frogs and toads into zoos is not a solution. But
he says he hopes it will buy time for more research… and eventually
get the animals re-established in the wild.


For the Environment Report, I’m Rebecca Williams.

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Destination Superstores Buy Up Farmland

  • Retail superstores, like this Cabela's in Dundee, Michigan, have become tourist destination sites. Environmentalists worry that these types of developments are adding to poor land use patterns. (Photo by Sarah Hulett)

Throughout the region, tourism is an important part of the economy. Families travel far and wide to visit historical sites, cultural institutions, and favorite recreation spots. But a relatively new part of the landscape is drawing people in for a single purpose: to shop. The Great Lakes Radio Consortium’s Sarah Hulett reports on how the trend is affecting land use patterns:

Transcript

Throughout the region, tourism is an important part of the economy. Families travel
far and wide to visit historical sites, cultural institutions, and favorite recreation
spots. But a relatively new part of the landscape is drawing people in for a single purpose: to
shop. The Great Lakes Radio Consortium’s Sarah Hulett reports on how the trend is affecting
land use patterns:


Brad Brinker is in Michigan for the day to take in the sights. He flew his plane from Pennsylvania
to Dundee, in the southeast corner of Michigan. Now he’s standing next to a waterfall that spills
into a pond filled with trout and aquatic plants.


“We were always impressed by the size of the mountain and the animals they have. That’s why
we’re here!”


The mountain is fake. The water? Pumped in. The animals? Stuffed.


This is Cabela’s – a 225-thousand-square-foot retail temple to the outdoors. It’s the home of 65-
thousand gallons of aquariums, dozens of game animals like caribou and mountain lions. There’s
a gun library, and acres of fishing equipment and hunting gear.


“Cabela’s considers itself a tourist attraction as well as retail. And in all of our major sites, we’ve
become one if not the major tourist attraction in the state.”


Steve Collins is the operations manager for Cabela’s. He says the strategy for drawing tourists and
shoppers hinges on careful placement of the store.


“What we try to do is make them destination stores, so people have to go out of their way a little
bit to get there. But once they get there they’re very easy to find. We’re not in the middle of a
mall. We’re not in the middle of town where you have to try and find us. Once you get down that
thoroughfare, we’re usually right at the exit. You can’t miss us.”


Michigan’s Cabela’s store IS easy to spot. You can see two 20-foot-tall bronze grizzlies from the
highway, locked in battle above a vast expanse of parking lot. The five-acre store was built to
look like a massive log cabin. It sits on a sweep of what used to be farmland. A U.S. highway
feeds thousands of cars a day onto its property.


It’s a familiar strategy for big-box retailers such as Home Depot and Wal-Mart. Land is generally
cheaper and easier to acquire in rural areas. And some of these superstores and outlet malls have
become destinations not just for shoppers, but for tourists. George Zimmerman directs Michigan’s
travel bureau.


“I think in the last ten years, on the national level, the Mall of America is an example of that.
Certainly the outlet mall boom is a big part of it. That certainly was a key point as far as retailing
as a destination, when those started popping up around the country.”


But superstores and outlet malls give environmentalists headaches. They say stores that set up
shop in undeveloped areas contribute to sprawl patterns that require expensive infrastructure.
They can also sap resources from nearby cities and towns. Although the business association near
Cabela’s Michigan store says the retailer has actually helped bring shoppers into the downtown
area, five miles away.


Victoria Pebbles works on sustainable development issues for the Great Lakes Commission.
Pebbles says there need to be disincentives for stores to locate in rural areas.


“If there are disincentives, for example, through farmland protection programs and protection of
natural features and cultural resources that are in our rural areas, then you can help to tip the
scales a little bit.”


Pebbles says right now, there are few restrictions on developing farmland into shopping malls.
Some states – such as Minnesota, Wisconsin, and Pennsylvania – have set aside money to help
local governments better coordinate land use planning. And Michigan recently set up a task force
that will make land use policy recommendations to its Legislature.


(bring up Cabela’s parking lot sound)


In the meantime, it looks as though retailers will continue to look for cheap land with easy access
to highways. Cabela’s plans to open its fifth store in the Great Lakes region this fall. Its
Pennsylvania store will be easy to spot, perched on a hundred acres right off I-78 and Route 61.


For the Great Lakes Radio Consortium, I’m Sarah Hulett.

Virgin Shark Birth Sets Researchers in Motion

  • Biologists are looking at how a shark in a Great Lakes region aquarium gave "virgin birth" last year. Photo courtesy of Belle Isle Aquarium, Detroit.

A female shark in an aquarium in the Great Lakes region has apparently given virgin birth. Four shark eggs hatched last year and three of those babies are now growing normally. As the Great Lakes Radio Consortium’s Celeste Headlee reports, it may be some time before the cause can be determined, but the event is still a surprise for biologists:

Transcript

A female shark in an aquarium in the Great Lakes region has apparently given virgin birth. Four
shark eggs hatched last year and three of those babies are now growing normally. As the Great
Lakes Radio Consortium’s Celeste Headlee reports, it may be some time before the cause can be
determined, but the event is still a surprise for biologists:

Biologists have a technical term for virgin birth. It’s called parthenogenesis. Doug Sweet is the
Curator of Fishes at the Belle Isle Aquarium in Detroit. He says parthenogenesis is common in
invertebrates and some amphibians.

“Most vertebrate animals, the females will produce eggs even if the male is not around. And it’s
just a matter of… it’s a chemical trick, basically, to get that egg to develop into an individual
without a sperm activating it.”

But parthenogenesis has been totally unheard of for sharks, until now. Last year, the Henry
Doorly Zoo in Omaha, Nebraska, announced they thought a Bonnethead shark there had
reproduced by parthenogenesis. The baby lived less than 12 hours, though, and genetic tests were
inconclusive.

But when Doug Sweet saw the press release from the Henry Doorly Zoo about a possible virgin
birth, he thought he’d try an experiment. Sweet decided to incubate the eggs of his two female
bamboo sharks. Four of the eggs developed. Sweet says the sharks were acquired by the
aquarium before they had reached sexual maturity, and they have never been exposed to a male.
He says the likely conclusion is that these sharks are reproducing by parthenogenesis.

Two other explanations, though highly unlikely, are that the shark has both testicular and ovarian
tissue, and fertilized its own eggs or that sharks are capable of storing sperm for years and even
passing it down to their offspring. Sweet has sent small clippings from the sharks’ fins to the
Henry Doorly Genetics Lab. Testing has already begun, but Sweet says it could take more than a
year to get the results. In the meantime, Sweet says the facts remain the same: a female shark
has given virgin birth. If it is parthenogenesis, he says, it will have important implications for
biologists around the world.

“Parthenogenesis just hasn’t been considered to happen in sharks; it’s never been recorded. It may
be happening all the time out there, so this is kind of breaking news in the shark world.”

The two adult bamboo sharks and the offspring are currently on exhibit at the Belle Isle
Aquarium in Detroit.

For the Great Lakes Radio Consortium, I’m Celeste Headlee.

Aquariums Soothe Alzheimer’s Patients

Alzheimer’s patients can present tough challenges to their caregivers.
Often, they won’t sit still long enough to eat, making it hard to get
proper nutrition. And they can be disruptive – yelling, spitting and
shoving. But researchers at Purdue University think they may have found
a simple answer to address these problems… and improve the quality of
life for Alzheimer’s patients. The Great Lakes Radio Consortium’s Wendy
Nelson explains: