Monday, May 16, 2011
Farm Fresh Salmon from Norway
There’s more than one fish in the sea.
And increasingly today, a lot of those fish are swimming around under the watchful eyes of fish farmers. During a recent trip to Norway, I had the opportunity to visit a salmon farm in the middle of a clear, cold fjord near historic cobble stoned city of Stavanger. Since my philosophy for choosing the best foods to eat for taste and health is ‘the more you know, the more you can eat’ I was interested in learning more about the risks and benefits of fish raised in captivity; especially since so many people today are asking the question, “Should I buy farm raised fish?” The answer simply put - it depends on the farm.
Fish Farming’s Not New
First let’s go back in time to ancient Hawaii -more than 1,000 years ago- when Polynesian settlers raised fish and shellfish in stone ponds built next to the sea. They fed the fish and managed water quality with moveable gates to allow the flow of the tides.
So there’s nothing new fangled about fish farming, but the science of aquaculture has come a long way.
Before my trip via speed boat across the Norwegian fjord to a floating platform overlooking salmon leaping energetically in their protected circular pens; I visited the The National Institute of Nutrition and Seafood Research in Bergen. Scientists here conduct research to provide advice on health and safety aspects of seafood both wild and farmed; as well as the health of the environment. An important focus is nutrition - both for developing feed composition for the fish and tailoring seafood products to optimize nutritional value for consumers who eat them. The connection between feed and fish quality is strong. “We call it ‘fish in - fish out’” explained Harald Sveier a specialist in aquaculture health for The Leroy Seafood Group, “The feed we use can impact the levels of omega 3 fats in the fish as well as other beneficial nutrients such as protein, vitamins and minerals.” Currently fish oils are mixed into grain based feed to provide the punch that boosts heart healthy omega 3 content in farm raised salmon (often much higher than wild salmon). But, Sveier predicts a shortage of fish oils in the future with the global demand created by an increase in fish farming, “That’s why we’re researching the use of plant based omega 3 oils such as rapeseed oil. It’s still an excellent source.”
Room to Jump and Swim
A key ingredient in growing healthy fish is healthy water. Norwegian regulations require that fish farmers prevent over crowding for the health of fish and fjord. Unlike many fish farm operations in Asia which Sveier described as “horrible”; it appears there’s plenty of room for Norwegian salmon to swim because the concentration of fish per confined area of water is kept at 2 ½ %. Aquaculture technicians on the Leroy platform I visited monitored computer screens that keep track of the oxygenation of the water in each pen and showed an underwater camera view of the salmon swimming around. “If the fish are happy they will grow faster,” says Sveier, “and because we’re using these practices today the fish are healthier so we don’t have to use antibiotics.” One sizable threat to farm raised salmon is the tiny sea louse which attaches to the fish’s skin and saps its strength. Norwegian fish farming operations, such as Leroy, are fighting back with a natural solution by introducing little fish that eat the sea lice and effectively clean off the salmon.
Fjord to Fork
Salmon from Norway may not be labeled with the country of origin. Often you’ll see “Atlantic Salmon” on restaurant menus or on supermarket signs indicating it could be from Norway, Canada or other north Atlantic nations. But it could also be from Chile, where salmon farming is big business, too. Chef Scott Gambone, Food and Beverage Manager for the Ritz-Carlton, Reynolds Plantation says, “Just as we tell guests the name of the farms where our fresh produce is grown; it would be good to be more specific about the waters the fish came from.” Fish farmers in Norway, proud of their carefully tended crops, would like to see ‘ocean to table’ join the ‘farm to table’ movement, too.
Posted by Carolyn O'Neil at 8:25 AM