Saving Seafood

Replacing fish-based aquaculture feed with plant-based increases environmental impacts

April 24, 2019 — The sustainability of farmed seafood is directly tied to how efficiently the animals turn their feed into flesh, aka food for people. Farms that use more feed to grow the same amount of food are more impactful than others. But what also matters is the kind of feed given to cultured species. Typically, fish and shrimp are fed fishmeal, a kind of feed made from ground-up fish. Fishmeal can be made from the excess trimmings of fish processing, but there are several wild-caught fisheries that only serve to be reduced into fishmeal for aquaculture, e.g. Peruvian anchoveta. However, with a growing market for farmed seafood, fishmeal is in high demand.

This has raised fishmeal prices worldwide; so some shrimp farms, most of which are in developing countries, have begun to substitute fishmeal with plant-based feeds. A recent paper in Sustainability, Malcorps et al. 2019, set out to measure the environmental and social impact of substituting fishmeal for plant-based feed in farmed shrimp. Currently, shrimp feeds are 20-30% fishmeal, depending on the shrimp species being farmed—what would the environmental impact be if those percentages dropped?

Malcorps et al. 2019 built a computer model to assess the changes in land, freshwater, and fertilizer use caused by substituting a portion of fishmeal shrimp feed with plant-based feed. The model found that substituting fishmeal with plant-based feed led to a dramatic increase in terrestrial resource demand for the 5 crops commonly used for substitution (wheat, soybeans, rapeseed, pea, and corn). A maximum plant-based substitution in shrimp feed would lead to a 63% increase in freshwater use, 81% increase in land use, and an 83% increase in phosphorus (fertilizer) relative to the current levels in those 5 crops.

Further, and more concerning, is the notion that increased demand on those 5 crops would raise prices and seriously impact poor families that rely on them for food.

Read the full story at Sustainable Fisheries UW

 

Eating Fish May Help City Kids With Asthma Breathe Better

April 1, 2019 — It’s long been known that air pollution influences the risk — and severity — of asthma. Now, there’s emerging evidence that diet can play a role, too.

A new study finds that higher consumption of omega-3 fatty acids, found in oily fish such as salmon, sardines and lake trout, and in some plant sources such as walnuts and flaxseed, is linked to reduced asthma symptoms in city kids who are exposed to fairly high levels of indoor air pollution.

“We know that asthma is a disease that’s driven by inflammation,” explains Dr. Emily Brigham, a pulmonologist at Johns Hopkins University and co-author of the study. As our bodies digest fish, the omega-3 fatty acids generate byproduct molecules known as “pro-resolving mediators” that make their way into our lungs. “They help to resolve inflammation,” Brigham says.

Given this anti-inflammatory effect, Brigham and her colleagues had a hunch that diets rich in omega-3 fatty acids may help attenuate the effects of air pollution on kids’ symptoms. To study this, they tracked the diets and indoor air pollution levels (from sources including smoke, dust and allergens) in the homes of 135 children, mostly African-American and all with asthma, in Baltimore, Md.

They measured two types of indoor air pollution, made up of different sizes of particulate matter: PM2.5 (fine inhalable particles that are 2.5 micrometers or smaller), and the somewhat larger PM10. These particulates are all too small for us to see, but they can make their way into our airways, and the smaller size — PM2.5 — can lodge deeply inside our lungs.

Read the full story at New England Public Radio

New study suggests fish oil derivative may benefit heart health

March 19, 2019 — New numbers suggest that a purified fish oil derivative, a prescription drug called Vascepa, is more effective at preventing cardiovascular events than previously thought.

The drug lowered the rate of these events in high-risk patients — including strokes, heart attacks and deaths from cardiovascular causes — by 30% overall versus placebo, according to a study published Monday in the Journal of the American College of Cardiology.

This is better than previously thought because because the study authors took into account not just first cardiovascular events as before, but also second, third, fourth events, and so on. Earlier results were announced by Irish drugmaker Amarin Pharma in September and then in a study released November in the New England Journal of Medicine.
“By looking only at first events, we underestimate the true underlying treatment benefit offered,” study author Dr. Deepak L. Bhatt said in a statement Monday.

“With this drug, we are not only preventing that first heart attack but potentially the second stroke and maybe that third fatal event,” said Bhatt, executive director of interventional cardiovascular programs at Brigham and Women’s Hospital and professor of medicine at Harvard Medical School.

According to these latest data on cardiovascular episodes, Vascepa slashed first events by a quarter, second and third events by more than 30%, and later events by almost a half. The researchers estimated that by treating a thousand patients for five years, they could prevent 76 coronary revascularizations, 42 heart attacks, 14 strokes, 16 hospitalizations due to unstable angina and 12 deaths related to cardiovascular causes.

Read the full story at CNN

Major Chinese fish oil producer and exporter Shandong Yuwang Pharmaceutical approved Friend of the Sea

November 19, 2018 — The following was released by Friend of the Sea:

Chinese manufacturer Shandong Yuwang Pharmaceutical Co. Ltd. has obtained Friend of the Sea certification for refined fish oil and softgel from Engraulis rigens sourced from FAO Area 87 (Southeast Pacific).

Friend of the Sea’s standard for sustainable fish oil and Omega-3 certifies that the oil originates only from fisheries that are compliant with Friend of the Sea’s sustainable fishing requirements, including good fishery management, selective fishing gears and social responsibility, and that a full chain of custody is in place throughout the supply and production chain.

Shandong Yuwang Pharmaceutical Co. Ldt., which processes 20000 tons of crude fish oil and produces 10000 tons of refined fish oil, is one of the largest world’s manufacturer of refined fish oil. While being exported to America and Europe, the finished fish oil also guarantees material supply of stringent standard’s fish oil preparation and products for Yuwang itself.

“We decided to join the Friend of the Sea project because we are eager to give our contribution in conserving the marine habitats and protecting them for future generations,” claims Albert Ho, Business Manager at Shandong Yuwang Pharmaceutical.

“The approval of Shandong Yuwang Pharmaceutical as a Friend of the Sea certified company consolidates the presence of our certification in China and is the confirmation that more and more fish oil manufacturers are committed towards environmental sustainability” comments Paolo Bray, Founder and Director of Friend of the Sea.

Recent studies say fish oil could boost your heart

November 16, 2018 — Heart disease is the leading killer in America, and San Antonio is no exception.

But as the Washington Post reports, two recent major studies point to the possibility that medications derived from fish oils could help protect people from heart attacks, strokes and other types of cardiovascular ailments. These are medications, not supplements.

The long-term studies involved two drugs derived from omega-3 fatty acids. Both studies found the drugs, if taken appropriately, made a significant difference for people with diabetes or heart disease.

Read the full story at the San Antonio Express

Should You Keep Taking Those Fish Oil And Vitamin D Pills?

November 16, 2018 — Nearly 19 million Americans take fish oil supplements and some 37 percent of us take vitamin D. Many may be motivated by research that has suggested these pills can protect heart health and prevent cancer. On Saturday, NPR published a story on long-awaited research on both supplements that called those claims into question.

The findings of the trial, called VITAL, were complex. When researchers looked at cancer and overall cardiovascular events, they found no protective benefit from taking vitamin D or fish oil supplements. But when they looked only at heart attacks, they did find a benefit, especially for African-Americans and people who eat little fish. (Researchers say further study is needed to see whether those benefits hold up.)

The story prompted a wave of questions from our readers and listeners. Many of you wrote in asking, essentially, should I stop taking these supplements?

To get answers to some of your questions, we spoke with Dr. JoAnn Manson, chief of the Division of Preventive Medicine, Department of Medicine, at Brigham and Women’s Hospital, who headed the VITAL trial. We also turned to Dr. Bess Dawson-Hughes, senior scientist and director of the Bone Metabolism Laboratory at Tufts University School of Medicine.

The findings of the VITAL study cast doubt on benefits of fish oil for cancer and cardiovascular disease. Should people just throw out their pills?

JoAnn Manson: No. For those already taking supplements, our findings do not offer a clear reason to stop. If you want to consider starting, our recommendation is to talk with your health care provider, but this does not need to be done on an urgent basis. We do caution against taking very high doses, but at the level fish oil [was taken] in our study there were no significant adverse effects. In addition, while fish oil did not reduce the risk of stroke or other cardiovascular problems, it did reduce the risk of heart attack by 28 percent and that is a significant finding.

Previous research suggests fish oil may have greater benefits for heart health than for reducing stroke, because there are some mechanisms — such as reducing irregular heart rhythm — which would be more important for heart attack than for stroke.

Read the full story at NPR

Fish-oil drugs protect heart health, two studies say

November 12, 2018 — Two major studies released Saturday provide evidence that medications derived from fish oil are effective in protecting people from fatal heart attacks, strokes and other forms of cardiovascular disease.

The large, multiyear research efforts tested different formulations and quantities of drugs made with Omega-3 fatty acids on two groups of people: one that suffered from cardiovascular disease or diabetes and another that represented the general population. Both studies found that people who took the drugs every day enjoyed protection against some heart and circulatory problems compared with those given a placebo.

In a look at another commonly consumed supplement, vitamin D, researchers found no effect on heart disease but saw a link to a decline in cancer deaths over time.

The research was released Saturday at the American Heart Association’s 2018 Scientific Sessions in Chicago and published in the New England Journal of Medicine.

About 43 million people in the United States take statins to lower LDL, or “bad,” cholesterol, and the drugs are credited with reducing the risk of heart attacks and strokes. But heart disease remains the leading killer of Americans. In recent years, a long, steady decrease in heart disease deaths has slowed. So researchers are seeking other ways to combat cardiovascular disease beyond known protective factors such as changes in diet, exercise and smoking habits.

One of the studies unveiled Saturday, named by the acronym REDUCE-IT, determined that people with cardiovascular disease who were already taking statins stood less chance of serious heart issues when they were also given two grams of the drug Vascepa (icosapent ethyl) twice a day.

Read the full story at The Washington Post

Decades-long study ties omega-3s from seafood to healthier aging

October 25, 2018 — A study of over 2,500 adults between 1992 and 2015 has found that omega-3 polyunsaturated fatty acids present in seafood reduce the risk of unhealthy aging.

The study, published in BMJ, started with adults at an average age of 74 in 1992 and examined the levels of four different omega-3s – eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), docosapentaenoic acid (DPA), and alpha linolenic acid (ALA) – present in their body. Over the course of the study, participants were surveyed regularly, and in three periods – 1992-1993, 1998-1999, and 2005-2006 – had the omega-3s present in their blood measured.

The study found, after correcting for other factors such as age, sex, and race, that adults with higher levels of EPA and DPA had a better chance of healthy aging. Participants with the highest level of omega-3s present had an 18 percent lower risk of unhealthy aging. Participants with the highest levels of EPA and DPA, the omega-3s commonly found in seafood, had the best results: Those with high levels of EPA had a 24 percent lower risk of unhealthy aging, and those with DPA had an 18 percent lower risk of unhealthy aging.

“We found that older adults who had higher levels of omega 3 from seafood were more likely to live longer and healthier lives,” lead study author Heidi Lai of the Friedman School of Nutrition Science and Policy at Tufts University in Boston told Reuters. “These findings support current national dietary guidelines to consume more seafood.”

The study also found that levels of DHA from seafood and ALA from plants did not seem to have an impact on whether the participant would age healthily or not.

“Docosahexaenoic acid from seafood and alpha-linolenic acid from plants were not associated with a lower likelihood of unhealthy ageing,” states the report.

Read the full story at Seafood Source

Omega-3s in Fish Oils Tied to Healthy Aging

October 19, 2018 — Higher blood levels of omega-3 fatty acids, the fats found in fish, are linked to a healthier old age, according to a new study.

Researchers tracked 2,622 adults, average age 74 and healthy at the start of the study, from 1992 to 2015, looking to see if they continued to live without chronic diseases and without mental or physical problems.

The investigators measured blood levels of four common types of omega-3s: EPA and DHA, found in seafood; ALA, derived from plants; and DPA, which the body produces in small amounts.

After adjusting for many medical, dietary and lifestyle factors, they found that compared with people in the lowest one-fifth for omega-3 levels, those in the highest one-fifth had an 18 percent lower risk of unhealthy aging. The study appeared in BMJ.

Considered separately, EPA and DPA were associated with lowered risk of unhealthy aging, but DHA and ALA were not.

Read the full story at The New York Times

Fishmeal industry optimistic on upcoming Peruvian anchovy season

October 15, 2018 — Fishmeal and fish oil industry sources are optimistic about the upcoming Peruvian anchovy fishing season, which might start earlier than expected, in mid-November.

Peru’s ministry of production (Produce) is expected to announce the start of the fishing season around the end of October, taking into account the outcome of the maritime institute’s ongoing evaluation.

“Sea conditions are optimal and good reproduction has already started on the acoustic cruise that will end at the end of October,” said Humberto Speziani, IFFO board member and former president of IFFO and of the Peruvian National Fisheries Society (SNP).

Although the evaluation hasn’t yet been completed, it seems that biomass in the water is abundant, which could lead to a quota of 2 million-2.5m metric tons, according to sources. Despite rumors that the quota could be as high as 2.5m metric tons, 2m-2.2m metric tons is more in line with the historical average, one source pointed out.

“2m-2.5m metric tons is quite a reliable assumption of quota,” Jean-Francois Mittaine, an analyst with 30 years experience in the sector, told Undercurrent News, adding that fishmeal and fish oil prices were currently “quite stable”.

Super prime fishmeal is currently priced at around $1,630-1,650 per metric ton, while fish oil is at around $1,350/t, according to industry sources in Peru. Meanwhile, prices in China were slightly falling, driven by expectations of a good upcoming Peruvian season, according to sources.

Read the full story at Undercurrent News