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

    Video As Refugees Perish, Greek Graveyards Fill

    Before burial at overflowing cemeteries, unidentified dead being swapped for DNA, in case some day relatives come to learn their fate

    Russian Opposition Leader Sues Putin for Conflict of Interest

    Alexei Navalny tells VOA in exclusive interview why transfer of $2 billion from country’s wealth fund to company with ties to President Putin’s son-in-law triggered lawsuit

    How Diversity Has Changed America

    Over the past four decades, the level of diversity in the United States has increased most in these four states

    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.
    As Refugees Perish, Greek Graveyards Filli
    X
    Hamada Elsaram
    February 11, 2016 8:01 PM
    Aid workers on the Greek island of Lesbos say they are struggling to bury the increasing number of bodies of refugees that have been recovered or washed up ashore in recent months.  The graveyards are all full, they say, yet as tens of thousands of people clamor to get out of Syria, it is clear refugees will still be coming in record numbers. For VOA, Hamada Elrasam reports from Lesbos, Greece.
    Video

    Video As Refugees Perish, Greek Graveyards Fill

    Aid workers on the Greek island of Lesbos say they are struggling to bury the increasing number of bodies of refugees that have been recovered or washed up ashore in recent months.  The graveyards are all full, they say, yet as tens of thousands of people clamor to get out of Syria, it is clear refugees will still be coming in record numbers. For VOA, Hamada Elrasam reports from Lesbos, Greece.
    Video

    Video To Fight Zika, Scientists Target Mosquitoes

    Mosquitoes strike again. The Zika virus outbreak is just the latest headline-grabbing epidemic carried by these biting pests, but researchers are fighting back with new ways to control them. VOA's Steve Baragona takes a look.
    Video

    Video Mosul Refugees Talk About Life Under IS

    A top U.S. intelligence official told Congress this week that a planned Iraqi-led operation to re-take the city of Mosul from Islamic State militants is unlikely to take place this year. IS took over the city in June 2014, and for the past year and a half, Mosul residents have been held captive under its rule. VOA's Zana Omar talked to some families who managed to escape. Bronwyn Benito narrates his report.
    Video

    Video Scientists Make Progress Toward Better Diabetes Treatment, Cure

    Scientists at two of the top U.S. universities say they have made significant advances in their quest to find a more efficient treatment for diabetes and eventually a cure. According to the International Diabetes Federation, the disease affects more than 370 million people worldwide. VOA’s George Putic reports.
    Video

    Video NATO to Target Migrant Smugglers

    NATO has announced plans to send warships to the Aegean Sea to target migrant smugglers in the alliance's most direct intervention so far since a wave of people began trying to reach European shores.
    Video

    Video Russia's Catholics, Orthodox Hopeful on Historic Pope-Patriarch Meeting

    Russia's Catholic minority has welcomed an historic first meeting Friday in Cuba between the Pope and the Patriarch of Russia's dominant Orthodox Church. The Orthodox Church split with Rome in 1054 and analysts say politics, both church and state, have been driving the relationship in the centuries since. VOA's Daniel Schearf reports from Moscow.
    Video

    Video Used Books Get a New Life on the Streets of Lagos

    Used booksellers are importing books from abroad and selling them on the streets of Africa's largest city. What‘s popular with readers may surprise you. Chris Stein reports from Lagos.
    Video

    Video After NH Primaries All Eyes on South Carolina

    After Tuesday's primary in New Hampshire, US presidential candidates swiftly turned to the next election coming up in South Carolina. The so-called “first-in-the-South” poll may help further narrow down the field of candidates. Zlatica Hoke reports.
    Video

    Video US Co-ed Selective Service Plan Stirs Controversy

    Young women may soon be required to register with the U.S. Selective Service System, the U.S. government agency charged with implementing a draft in a national emergency. Top Army and Marine Corps commanders told the Senate Armed Services Committee recently that women should register, and a bill has been introduced in Congress requiring eligible women to sign up for the military draft. The issue is stirring some controversy, as VOA’s Bernard Shusman reports from New York.
    Video

    Video Lessons Learned From Ebola Might Help Fight Zika

    Now that the Ebola epidemic has ended in West Africa, Zika has the world's focus. And, as Carol Pearson reports, health experts and governments are applying some of the lessons learned during the Ebola crisis in Africa to fight the Zika virus in Latin America and the Caribbean.
    Video

    Video Smartphone Helps Grow Vegetables

    One day, you may be using your smartphone to grow your vegetables. A Taipei-based company has developed a farm cube — a small, enclosed ecosystem designed to grow plants indoors. The environment inside is automatically adjusted by the cube, but it can also be controlled through an app. VOA's Deborah Block has more on the gardening system.
    Video

    Video Illinois Voters Have Mixed Emotions on Obama’s Return to Springfield

    On the ninth anniversary of the launch of his quest for national office, President Barack Obama returned to Springfield, Illinois, to speak to the Illinois General Assembly, where he once served as state senator. His visit was met with mixed emotions by those with a front-row seat on his journey to the White House. VOA's Kane Farabaugh reports.
    Video

    Video Exhibit Turns da Vinci’s Drawings Into Real Objects

    In addition to being a successful artist, Renaissance genius Leonardo da Vinci designed many practical machines, some of which are still in use today, although in different forms. But a number of his projects were never realized — until today. VOA’s George Putic reports.
    Video

    Video Heated Immigration Debate Limits Britain’s Refugee Response

    Compared to many other European states, Britain has agreed to accept a relatively small number of Syrian refugees. Just over a thousand have arrived so far -- and some are being resettled in remote corners of the country. Henry Ridgwell reports on why Britain’s response has lagged behind its neighbors.
    Video

    Video Russia's Car Sales Shrink Overall, But Luxury and Economy Models See Growth

    Car sales in Russia dropped by more than a third in 2015 because of the country's economic woes. But, at the extreme ends of the car market, luxury vehicles and some economy brands are actually experiencing growth. VOA's Daniel Schearf reports from Moscow.