Fish Farms

So why all the concerns and fuss about a technology that was supposed to end world hunger and food shortage? When all is said and done, it comes down to a matter of health risks and environmental damage - Shilo Zylbergold

Fish Farms
Fish Farms

image by: Artur Rydzewski

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Fish Farming: Harming Oceans While Poisoning People and the Environment

Approximately half of all fish eaten around the world come from industrial fish farms. Farmed fish are typically grown in large tanks, industrial enclosures, sea cages, net pens, or small ponds to produce high yields of fish in short periods of time.

A study produced by the World Bank, Food and Agriculture Organization of the United Nations (FAO), and the International Food Policy Research Institute (IFPRI) predicted that by the year 2030, two-thirds of the global food fish supply will come from fish farming.

While many people within the fish industry say that fish farming is done for sustainability reasons and to not overstress the marine environment of the oceans, there…

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Articles of Interest

Omega-3s: Is It an Environmental Disaster?

Are Omega-3 fatty acids one of nature's wonder supplements or are we just destroying the fish and the oceans and ultimately ourselves in the quest for health?

A 20-year retrospective review of global aquaculture

Despite impressive gains, the aquaculture sector still faces serious challenges that, in some cases, undermine its ability to achieve sustainable outcomes.

Another Side of Tilapia, the Perfect Factory Fish

But many biologists worry that the big business of tilapia farming will outweigh caution, leaving dead lakes and extinct species.

Can Farmed Fish Feed The World Without Destroying The Environment?

But large-scale aquaculture can have significant environmental consequences. It can take a lot of wild fish to feed certain farmed fish. And when tons of fish are crowded together, they create a lot of waste, which can pollute the ocean. Fish farms can also be breeding grounds for disease. Plus, shrimp farming in Indonesia is at least partly responsible for the region's declining mangrove forests.

Catch of the day

A common complaint by green types is that fish farming does not relieve as much pressure on the oceans as it appears to, because a lot of the feed it uses is made of fish meal.

Climate crisis and antibiotic use could 'sink' fish farming industry – report

Sewage and wastewater discharged from fish farms is also associated with toxic algal blooms and polluted drinking water.

Disadvantages in Fish Farming

Fish farming now accounts for half of all fish consumed worldwide, according to Stanford University. Yet the process has its disadvantages, ranging from disease control to environmental hazards.

Environmental Claims For Farmed Fish Don't Hold Up To Scrutiny

Now that half of the seafood consumed around the world comes from aquaculture, a number of environmental concerns — from overuse of antibiotics, to pollution, to sources of fish feed — are emerging at these farms.

Farming the ocean to save the world

The problem is that the oceans are being rapidly depleted of fish. Scientists say we reached “peak fish” some 30 years ago, meaning that we are no longer able to extract more every year from the ocean without the risk of a collapse of the global fisheries. The answer, they say, is farming. Not farming the land, but farming the ocean.

Fish farming for the future

Open net-cage aquaculture provides no barrier between the farmed fish and their surrounding environment. This means that enormous amounts of fish feed, feces and chemicals are released in to the environment every day, often causing inhabitable conditions for other species. In B.C. alone, salmon farms produce the same amount of waste as a city of half a million people.
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There are other collateral problems created by industrial scale aquaculture: the destruction of coastal habitats through waste disposal, the introduction of diseases and the possible escape of exotic species that can threaten indigenous breeds. Halweil says we need to farm fish in ways that more closely "mimic the oceans," combining multiple, complementary species, including "cleaner fish" to control sea lice, for instance, as some farms already do in Norway.

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Why Farmed Fish Are Taking Over Our Dinner Plates

With a decades long global consumption boom depleting natural fish populations of all kinds, demand is increasingly being met by farm-grown seafood.

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