11/03/2016
9 Things Everyone Should Know About Farmed Fish
By Dr. Mercola
Industrial fish farming, or aquaculture, is the fastest growing form of food production in the world.1 About half of the world's seafood now comes from fish farms, including in the US, and this is expected to increase.
Already, for the first time in modern history, in 2011 global farmed fish production topped beef production, and the gap widened in 2012 when 66 million tons of farmed fish were produced, compared to 63 million tons of beef.2
At first glance, farmed fish may seem like a good idea to help protect wild seafood populations from overfishing while meeting the nutritional needs of an ever-expanding global population.
In reality, however, the industry is plagued with many of the same problems surrounding land-based concentrated animal feeding operations (CAFOs), including pollution, disease and inferior nutritional quality. It's getting so bad that fish farms can easily be described as "CAFOs of the sea."
9 Facts About Farmed Fish: Read This Before Your Next Seafood Meal…
1. The Omega-3 Levels Are Not What You Think
If you're eating fish, you're probably doing so, in part, to take advantage of their beneficial omega-3 fats. But levels of critical omega-3 fats may bereduced by about 50 percent in farmed salmon, compared to wild salmon, due to increasing amounts of grain and legume (e.g. soy) feed.
Farmed salmon, for example, is much fattier than wild salmon, but it contains FAR LESS healthful omega-3 fats and less protein.3
2. Small Prey Fish May Be Driven to Extinction
Many farmed fish are being fed genetically modified (GM) corn and soy, but others require a fish-based diet. Ironically, tiny prey fish like anchovies and herring are now being dangerously overfished to meet the growing feed demands of farmed-fish populations.
The non-profit group Oceana blames aquaculture for declines in whales, dolphins, seals, sea lions, penguins, albatross and many other species. They stated:4
"Rather than relieving pressure on wild fish, growing these large carnivores [salmon and tuna on fish farms] requires a steady supply of prey that are caught and ground into oil and meal. As the industry grows, it is straining the existing supply of prey fish, putting additional pressure on populations that cannot supply the demand."
3. Fish Feel Pain and Stress
Research has shown that, like birds and mammals, fish feel pain and stress.5 The practices of raising fish in extremely confined environments, and killing them in painful ways like evisceration, starvation or asphyxiation must therefore be regarded as inhumane.
4. Farmed Fish May Spread Disease to Wild Fish
The close quarters where farmed fish are raised (combined with their unnatural diets) means disease can spread quickly, and because farmed fish are often raised in pens in the ocean, pathogens can spread like wildfire and contaminate any wild fish swimming past.
Sea lice, a type of crustacean that is easily incubated by captive fish on farms, have become a significant problem and have been blamed for declining numbers of wild pink salmon, as well as the species that eat them (bears, eagles, orcas and others). Other types of lethal viruses spread from fish farms are also now being detected in wild populations, including:
• Salmon leukemia virus, which attacks the salmon's immune system so it dies of something else, much like HIV's role in producing the opportunistic infections that kill AIDS patients
• Infectious Salmon Anemia Virus (ISA), also known as salmon influenza, which is highly lethal
• Piscine reovirus, which gives salmon a heart attack and prevents them from swimming upriver
5. Fish Farms Pollute the Environment and Damage Local Ecosystems
Concentrated antibiotics, pesticides and other chemicals are commonly used to fight diseases and parasites common to fish farms. What effect this has on the environment is only beginning to be understood, but it doesn't look good. Take one study, which found a drug used to kill sea lice also kills other marine invertebrates, can travel up to half a mile and persists in the water for hours.
6. Fish F***s Harm Coral Reefs
Fish waste and uneaten feed further litter the sea floor beneath these farms, generating bacteria that consume oxygen vital to shellfish and other bottom-dwelling sea creatures. Farmed fish waste promotes algal growth that that harms the water's oxygen content, posing risks to coral reefs and other aquatic life. Reportedly, the Israeli government shut down two fish farms in the Red Sea after learning that they were promoting algal growth that was harming coral reefs.
7. Farmed Fish Escape
There are multiple problems that result when farmed fish escape into the wild (which they do, in the numbers of millions each year). For starters, the 'wild' North Atlantic salmon that you purchase may actually be a farmed escapee, making it difficult to know what you're really eating. The escaped fish also breed with wild fish, and research shows that these hybrid-born fish are less viable and die earlier than wild salmon. This could contaminate the entire gene pool and harm the future of the wild population.
8. The Jevons Paradox in Practice
The Jevons Paradox says that "as production methods grow more efficient, demand for resources actually increases – rather than decreasing, as you might expect," MindBodyGreen reports. This is precisely what has happened with aquaculture. As fish production became more efficient, demand for salmon has increased significantly. This has, in turn, put increased demand on fish farms, which are using even more resources as a result.
9. Revenues Can't Offset the Heavy Environmental Costs
Aquaculture has been deemed both ecologically and economically unstable, with "an unequal tradeoff between environmental costs and economic benefits." In the US, hidden environmental costs are said to cost $700 million a year, which is half the annual production value of the farms.
Norwegian Health Department Warned Against Eating Too Much Farmed Salmon
Dr. Anne-Lise Birch Monsen at the University of Bergen, Norway has raised serious concerns about high levels of contaminants in farm-raised salmon. The contaminants in question originate in wild fish, courtesy of environmental pollution. These toxic contaminants bind to the fat molecules in wild fish, and when these fish are ground up for use in fish meal together with added high-fat fish oils, ultimately these molecules can enter your body where they bind toyour cells.
In 2006 Russia actually banned Norwegian farmed salmon, claiming it contained excessive amounts of lead and cadmium (originating from the feed). Norway is the world's top producer of farmed salmon.
The Norwegian Food Safety Authority (FSA) rejected the accusations, but Dr. Claudette Bethune, a researcher at the National Institute of Nutrition and Seafood Research (NIFES) spoke out saying that "given the amount of research, there is no way Norway can be so sure its salmon is completely safe." She also told the media that the FSA's recommendations on how much salmon is safe to eat actually exceeded the level set by the World Health Organization (WHO) for poison ingestion.
Despite that, and in the midst of all these rising concerns over the past several years, a story in the Norwegian media11 revealed that Norway lobbied the EU to raise the permissible level of toxins in salmon feed, which has now been granted. Earlier this year, reports of farmed salmon toxicity actually spread through Norwegian news, and the Norwegian Health Department went on the record warning against eating too much farmed salmon:
