News / Science & Technology

Combined Fish-Vegetable Farming Catching On

'Aquaponics' Farms Fish and Vegetables Togetheri
X
November 18, 2013 11:24 PM
A new way of farming is on the rise. 'Aquaponics' raises fish and vegetables together in a symbiotic system. Sustainability advocates have embraced the technique as a compact way to efficiently produce high quality, nutritious food. But as VOA’s Steve Baragona reports, it remains to be seen whether aquaponics is sustainable financially as well as environmentally.
The fish don’t like strangers.

Ellen Perlman pours a scoop of fish food into one of four blue plastic tanks at Chesapeake Aquaponics, about half an hour from Baltimore. Picture a giant kiddie pool that's deep enough to stand in up to your belly.

“You would think we have piranhas here,” she said, expecting a torrent of tilapia to froth the water’s surface but it remains stubbornly smooth. She chuckled. "Maybe not.” 

She says the fish recognize her voice and her footsteps, but not a visiting reporter’s.

“Fish are very sensitive animals,” she added.

Environmental sweet spot

But it’s an indelicate aspect of these delicate creatures that makes her garden grow. From these tanks, water rich in what you might call “fish manure” flows through a filter system and into the adjacent plant beds, where lettuce and other vegetable plants float in Styrofoam rafts.

“It’s a way of recycling the fish nutrients,” she says.

It’s called aquaponics. It combines aquaculture - or fish farming - with hydroponics - growing plants without soil.

Aquaponics hits a sweet spot for environmentalists. It recycles fish waste into plant food. Hydroponics typically uses less water than conventional farming. And for those concerned about insecticides on their produce, the fact that the fish share the water with the plants means aquaponic farmers have to be very careful about what they spray.

“Any type of spray would harm the fish,” Perlman said. Even insecticidal soaps popular with organic growers are off limits.

Another part of aquaponics’ appeal is the fact that overfishing is depleting the world’s oceans.  Fish farming accounts for at least half the world’s production, but waste from all those confined fish is polluting some areas.

“There are fewer and fewer fish in the ocean and more and more fish will be raised on farms,” said Dave Love, a microbiologist with the Johns Hopkins University Center for a Livable Future (CLF). “The trick is, how do we do that responsibly, sustainably and in ways that make fish farmers money?”

Small but productive

Tackling those questions is what CLF’s Cylburn Aquaponics Farm aims to do.

Located next to greenhouses at Baltimore’s Cylburn Arboretum, the farm has been up and running for a little over a year.

Farm manager Laura Genello says she’s delivering about 10 to 20 pounds (five to 10 kilograms) of produce per week to local farmers markets from about 300 square feet (28 square meters) of growing space.

“Which is relatively small,” she said, “but 10 pounds of greens is a fair amount of greens.”

The farm harvested its first 20 one-kilo fish earlier this fall, and they expect to produce about 275 fish per year.

Profitable?

But whether aquaponics is profitable is an open question. Energy costs are a big factor.

“Our tilapia like 70 degrees (21C). In the winter, it gets quite a bit cooler," Love said. "So, we need to heat the space.”

Cylburn Aquaponics Farm is grant-funded, but Chesapeake Aquaponics is a commercial venture. It has not turned a profit yet, but Perlman is optimistic that providing high-quality fresh greens in the middle of winter will win her a niche market.

The elegance of aquaponics’ symbiosis is alluring, and aquaponic businesses and nonprofit projects are popping up around the country and around the world.

But Genello is cautious.

“I think we have to be careful about not getting ahead of ourselves with the excitement about the system because there are a lot of things that are not quite perfect about it,” Genello said. “That’s why it’s really important for more people to actually do aquaponics, so we get more people experimenting and playing around with what works and what doesn’t.”

You May Like

Photogallery Americans Celebrate Thanksgiving With Feasts, Festivities

Holiday traditions include turkey dinners, 'turkey trots,' American-style football and New York parade with giant balloons More

Video For Obama, Ferguson Violence is a Personal Issue

With two years left in term, analysts say, president has less to lose by taking conversation on race further More

Video Italian Espresso Expands Into Space

When Italian astronaut Samantha Cristoforetti headed for the ISS, her countrymen worried how she would survive six months drinking only instant coffee More

This forum has been closed.
Comment Sorting
Comments
     
by: Osmundo Gemora Libo-on from: Binalbagan, Negros Occ.
December 04, 2013 4:19 PM
I have been looking for alternative farming and maybe this is good and applicable here.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
South Africa Sees Male Circumcision as Way to Reduce HIV Infectionsi
X
November 28, 2014 3:31 PM
South Africa remains plagued by AIDS despite massive government and NGO efforts on prevention and life-sustaining Anti-Retro-Viral programs. But the country has opened up another front to reduce new HIV infections: promoting circumcision. Emilie Iob reports for VOA News from a pioneering circumcision center in Orange Farm, Johannesburg.
Video

Video South Africa Sees Male Circumcision as Way to Reduce HIV Infections

South Africa remains plagued by AIDS despite massive government and NGO efforts on prevention and life-sustaining Anti-Retro-Viral programs. But the country has opened up another front to reduce new HIV infections: promoting circumcision. Emilie Iob reports for VOA News from a pioneering circumcision center in Orange Farm, Johannesburg.
Video

Video To Make A Living, Nairobi Street Vendors Face Legal Hurdles, Physical Violence

The Nairobi City Council has been accused of brutality in dealing with hawkers in the Central Business District - in order to stop them from illegally selling their wares on the streets. Lenny Ruvaga has more for VOA News from the Kenyan capital.
Video

Video For Obama, Ferguson Violence is a Personal Issue

Throughout the crisis in Ferguson, Missouri, President Barack Obama has urged calm, restraint and respect for the rule of law. But the events in Ferguson have prompted him to call — more openly than he has before — for profound changes to end the racism and distrust that he believes still exists between whites and blacks in the United States. VOA White House correspondent Luis Ramirez reports.
Video

Video Online Magazine Gets Kids Discussing Big Questions

Teen culture in America is often criticized for being superficial. But an online magazine has been encouraging some teenagers to explore deeper issues, and rewarding their efforts. VOA religion reporter Jerome Socolovsky went to this year’s Kidspirit awards ceremony in New York.
Video

Video US Community Kicks Off Thanksgiving With Parade

Thursday is Thanksgiving in the United States, a holiday whose roots go back to the country's earliest days as a British colony. One way Americans celebrate the occasion is with parades. Anush Avetisyan takes us to one such event on the day before Thanksgiving near Washington, where a community's diversity is on display. Joy Wagner narrates
Video

Video Aung San Suu Kyi: Myanmar Opposition to Keep Pushing for Constitutional Change

Myanmar opposition leader Aung San Suu Kyi says she and her supporters will continue pushing to amend a constitutional clause that bars her from running for president next year. VOA's Than Lwin Htun reports from the capital Naypyitaw in this report narrated by Colin Lovett.
Video

Video Mali Attempts to Shut Down Ebola Transmission Chain

Senegal and Nigeria were able to stop small Ebola outbreaks by closely monitoring those who had contact with the sick person and quickly isolating anyone with symptoms. Mali is now scrambling to do the same. VOA’s Anne Look reports from Mali on what the country is doing to shut down the chain of transmission.
Video

Video Ukraine Marks Anniversary of Deadly 1930s Famine

During a commemoration for millions who died of starvation in Ukraine in the early 1930s, President Petro Poroshenko lashed out at Soviet-era totalitarianism for causing the deaths and accused today’s Russian-backed rebels in the east of using similar tactics. VOA’s Daniel Shearf reports from Kyiv.
Video

Video Hong Kong Protests at a Crossroads

New public opinion polls in Hong Kong indicate declining support for pro-democracy demonstrations after weeks of street protests. VOA’s Bill Ide in Guangzhou and Pros Laput in Hong Kong spoke with protesters and observers about whether demonstrators have been too aggressive in pushing for change.
Video

Video US Immigration Relief Imminent for Mixed-Status Families

Tens of thousands of undocumented immigrants in the Washington, D.C., area may benefit from a controversial presidential order announced this week. It's not a path to citizenship, as some activists hoped. But it will allow more immigrants who arrived as children or who have citizen children, to avoid deportation and work legally. VOA's Victoria Macchi talks with one young man who benefited from an earlier presidential order, and whose parents may now benefit after years of living in fear.
Video

Video New Skateboard Defies Gravity

A futuristic dream only a couple of decades ago, the hoverboard – a skateboard that floats above the ground - has finally been made possible. While still not ready for mass production, it promises to become a cool mode of transport... at least over some surfaces. VOA’s George Putic reports.
Video

Video Falling Gas Prices Impact US Oil Extraction

With the price of oil now less than $80 a barrel, motorists throughout the United States are benefiting from gas prices below $3 a gallon. But as VOA’s Kane Farabaugh reports, the decreasing price of petroleum has a downside for the hydraulic fracturing industry in the United States.

All About America

AppleAndroid