Quantcast

Farmed Fish Production Overtakes Beef

Earth Policy Institute

By Janet Larsen and J. Matthew Roney

Photo courtesy of Shutterstock

The world quietly reached a milestone in the evolution of the human diet in 2011. For the first time in modern history, world farmed fish production topped beef production. The gap widened in 2012, with output from fish farming—also called aquaculture—reaching a record 66 million tons, compared with production of beef at 63 million tons. And 2013 may well be the first year that people eat more fish raised on farms than caught in the wild. More than just a crossing of lines, these trends illustrate the latest stage in a historic shift in food production—a shift that at its core is a story of natural limits.

As the global demand for animal protein grew more than fivefold over the second half of the twentieth century, humans began to press against the productivity constraints of the world’s rangelands and oceans. Annual beef production climbed from 19 million tons in 1950 to more than 50 million tons in the late 1980s. Over the same period, the wild fish catch ballooned from 17 million tons to almost 90 million tons. But since the late 1980s, the growth in beef production has slowed, and the reported wild fish catch has remained essentially flat.

The bottom line is that getting much more food from natural systems may not be possible. Much of the world’s grassland is stocked at or beyond capacity, and most of the world’s fisheries are fished to their limits or already crashing. Overstocked rangelands become obvious as the loss of protective vegetation leads to soil degradation, which at its worst can cause punishing dust and sand storms. Overexploited fisheries are less readily visible, but fishing patterns over time reveal that more effort is required to achieve the same size catch as in years past. Boats are using more fuel and traveling to more remote and deeper waters to bring in their haul. Anglers are pulling up smaller fish, and populations of some of the most popular food fish have collapsed.

Historically, people’s taste in eating animal protein was largely shaped by where they lived. In places with extensive grasslands, like in the U.S., Brazil, Argentina and Australia, people gravitated toward grazing livestock. Along coasts and on islands, as in Japan, wild fish tended to be the protein staple. Today, with little room for expanding the output from rangelands and the seas, producing more beef and fish for a growing and increasingly affluent world population has meant relying on feedlots for fattening cattle and on ponds, nets and pens for growing fish.

While open waters and grasslands can be self-sustaining if managed carefully, raising fish and livestock in concentrated operations requires inputs. Grain and soybeans have been inserted into the protein production food chain. Cattle consume seven pounds of grain or more to produce an additional pound of beef. This is twice as high as the grain rations for pigs, and over three times those of poultry.

Fish are far more efficient, typically taking less than two pounds of feed to add another pound of weight. Pork and poultry are the most widely eaten forms of animal protein worldwide, but farmed fish output is increasing the fastest. Average annual growth rates over the last five years have mirrored the relative efficiency of feed use, with the global production of farmed fish growing by nearly six percent a year, poultry by four percent, and pork by 1.7 percent—fast outpacing beef, which barely increased at all.

As grain and soybean prices have risen well above historical levels in recent years, the cost of producing grain-eating livestock has also gone up. Higher prices have nudged consumers away from the least-efficient feeders. This means more farmed fish and less beef. In the U.S., where the amount of meat in people's diets has been falling since 2004, average consumption of beef per person has dropped by more than 13 percent and that of chicken by five percent. U.S. fish consumption has also dropped, but just by two percent.

Beyond economic considerations, health and environmental concerns are also leading many people in industrial countries to reduce their beef intake. Meanwhile, fish are touted as healthy alternatives (save for the largest types, which have accumulated mercury from environmental pollution). Diets heavy in red meat have been associated with a higher risk for heart disease and colon cancer, among other ailments. Beef production has garnered a negative reputation for having a large carbon footprint and for destroying habitat, notably in the Brazilian Amazon. And excess nitrogen fertilizer applied to the fields of feed corn grown to satisfy the world’s livestock runs off into streams and rivers, sometimes flowing to coastal waters where it creates large algal blooms and low-oxygen “dead zones” where fish cannot survive.

While it is only recently that the limitations of natural systems have emerged on a global scale, the practice of aquaculture dates back millennia. China, which accounts for 62 percent of the world’s farmed fish, has long cultivated different types of carp that eat different things—phytoplankton, zooplankton, grass or detritus—together in a mini ecosystem. Today carp and their relatives are still the mainstay of Chinese aquaculture, making up nearly half the country’s output. Filter-feeding mollusks, like clams and oysters, account for close to a third. Carp, catfish and other species are also grown in Chinese rice paddies, where their waste can fertilize the grain crop. This is also practiced in Indonesia, Thailand and Egypt.

Unfortunately, not all aquaculture works this way. Some of the farmed fish that are quickly gaining popularity, like salmon and shrimp, are carnivorous species that eat fishmeal or fish oil produced from forage fish from the wild. Yet most forage fish stocks (think anchovies, herrings and sardines), which typically make up about a third of the world oceanic fish catch, are dangerously overharvested. Fish farmers are working to reduce the amount of fish meal and oil in their rations, but in the rush to meet ever-expanding world demand, the share of farmed fish being fed has increased because they can reach market size quickly. Norway, the world’s top farmed salmon producer, now imports more fish oil than any other country. China, the world’s leading shrimp producer, takes in some 30 percent of the fishmeal traded each year.

As cattle ranches have displaced biologically rich rainforests, fish farms have displaced mangrove forests that provide important fish nursery habitats and protect coasts during storms. Worldwide, aquaculture is thought to be responsible for more than half of all mangrove loss, mostly for shrimp farming. In the Philippines, some two thirds of the country’s mangroves—more than 100,000 hectares—have been removed for shrimp farming over the last 40 years.

Another problem with intensive confined animal feeding operations of all kinds, whether for farmed fish or for cattle, is not what gets extracted from the environment but what gets put in it. On a small-scale farm with livestock, animal waste can be used to fertilize crops. But putting large numbers of animals together transforms waste from an asset into a liability. Along with the vast quantities of waste, the antibiotic and parasite-killing chemicals used to deal with the unwanted disease and infestations that can spread easily in crowded conditions also can end up in surrounding ecosystems. The overuse of antibiotics in livestock operations can lead to antibiotic-resistant bacteria, threatening both human and animal health. In the U.S., for instance, 80 percent of antibiotics use is in agriculture—and often not for treating sick animals but for promoting rapid weight gain.

Thus the solutions to our collision with the limitations of the natural systems that have long provided food have created their own host of problems. On a per person basis, beef consumption—now averaging less than 20 pounds (8.9 kilograms) each year globally—is unlikely to rebound to the 24 pounds eaten in the 1970s. But annual world fish consumption per person of 42 pounds—up from 25 pounds in the 1970s—is set to keep rising. With the additional fish coming from farms rather than the seas, the urgency of making aquaculture sustainable is clear.

On the fish feed front, fishmeal producers are incorporating more seafood scraps into their products; today roughly a third of fishmeal is made up of food fish trimmings and other by-products. And some fish farmers are substituting livestock and poultry processing wastes and plant-based feeds for fishmeal and oil, which does not sound particularly appetizing, but does reduce pressure on wild stocks. From a sustainability standpoint, however, it would be preferable to shift the balance back in favor of farmed fish raised without feeds based on food grains, oilseeds and protein from other animals.

Our global population of seven billion people, growing by nearly 80 million per year, cannot escape the limits of nature. To live within Earth’s natural boundaries requires rethinking meat and fish production practices to respect ecology. Most important, it means reducing demand by slowing population growth and, for those of us already living high on the food chain, eating less meat, milk, eggs and fish.

Visit EcoWatch’s FOOD and FACTORY FARMING pages for more related news on this topic.

EcoWatch Daily Newsletter

MStudioImages / E+ / Getty Images

By Jillian Kubala, MS, RD

Backpacking is an exciting way to explore the wilderness or travel to foreign countries on a budget.

Read More Show Less
Tim P. Whitby / 21st Century Fox / Getty Images

The beauty products we put on our skin can have important consequences for our health. Just this March, the U.S. Food and Drug Administration (FDA) warned that some Claire's cosmetics had tested positive for asbestos. But the FDA could only issue a warning, not a recall, because current law does not empower the agency to do so.

Michelle Pfeiffer wants to change that.

The actress and Environmental Working Group (EWG) board member was spotted on Capitol Hill Thursday lobbying lawmakers on behalf of a bill that would increase oversight of the cosmetics industry, The Washington Post reported.

Read More Show Less
Sponsored
A protest march against the Line 3 pipeline in St. Paul, Minnesota on May 18, 2018. Fibonacci Blue / CC BY 2.0

By Collin Rees

We know that people power can stop dangerous fossil fuel projects like the proposed Line 3 tar sands oil pipeline in Minnesota, because we've proved it over and over again — and recently we've had two more big wins.

Read More Show Less
Scientists released a study showing that a million species are at risk for extinction, but it was largely ignored by the corporate news media. Danny Perez Photography / Flickr / CC

By Julia Conley

Scientists at the United Nations' intergovernmental body focusing on biodiversity sounded alarms earlier this month with its report on the looming potential extinction of one million species — but few heard their calls, according to a German newspaper report.

Read More Show Less
DoneGood

By Cullen Schwarz

Ethical shopping is a somewhat new phenomenon. We're far more familiar with the "tried and tested" methods of doing good, like donating our money or time.

Read More Show Less
Sponsored
Pixabay

Summer is fast approaching, which means it's time to stock up on sunscreen to ward off the harmful effects of sun exposure. Not all sunscreens are created equally, however.

Read More Show Less
Mark Wallheiser / Getty Images

The climate crisis is a major concern for American voters with nearly 40 percent reporting the issue will help determine how they cast their ballots in the upcoming 2020 presidential election, according to a report compiled by the Yale Program on Climate Change Communication.

Of more than 1,000 registered voters surveyed on global warming, climate and energy policies, as well as personal and collective action, 38 percent said that a candidate's position on climate change is "very important" when it comes to determining who will win their vote. Overall, democratic candidates are under more pressure to provide green solutions as part of their campaign promises with 64 percent of Democrat voters saying they prioritize the issue compared with just 34 percent of Independents and 12 percent of Republicans.

Read More Show Less
Flooding in Winfield, Missouri this month. Jonathan Rehg / Getty Images

President Donald Trump has agreed to sign a $19.1 billion disaster relief bill that will help Americans still recovering from the flooding, hurricanes and wildfires that have devastated parts of the country in the past two years. Senate Republicans said they struck a deal with the president to approve the measure, despite the fact that it did not include the funding he wanted for the U.S.-Mexican border, CNN reported.

"The U.S. Senate has just approved a 19 Billion Dollar Disaster Relief Bill, with my total approval. Great!" the president tweeted Thursday.

Read More Show Less