The perfect storm: Environmentally and socially unsustainable seafood supply chains

 

Seafood supply chains sustain three billion people nutritionally and also provide 10% of the world’s population with employment, the vast majority of whom are small-scale fisher-people. Seafood provides access to safe protein for many of the world’s most economically marginalised people but these supply chains are not sustainable in their current form. 90% of global fish stocks are either fully fished or overfished and numerous species are becoming endangered, for example: bluefin tuna.

 

 

Seafood supply chains are also blighted by many of the same problems explored in our previous blogs on terrestrial food production, such as inequality, waste and poor governance. They are also marred by illegal fishing, fraud and modern slavery, with international crime organisations being key players in the industry. It is estimated that there is a one in five chance that when we buy seafood it has been illegally caught. This robs local fishing communities of their livelihoods and their food. Fraud is a key strategy for moving this illegally caught seafood through the supply chain to the consumer. For example, Russian waters are drained by illegal fishing operations and the seafood is processed in China so its provenance is hidden. In the worst cases, illegal fishing is even mislabelled as being responsibly sourced.

 

As fish stocks become depleted, fishing vessels need to travel further from the coast in search of fish. This, combined with the high levels of illegal, unreported and unregulated (IUU) fishing within the industry create ideal conditions for modern slavery. Forced labour and human trafficking are well-documented in the tuna fisheries of the Pacific but despite this, only 4 of the 35 leading tuna brands conduct due diligence on modern slavery within their supply chains. Violence against fisher people working in the Pacific is similarly well documented, with human rights abuses including beatings and murder, with dead bodies being thrown into the ocean.

While it is tempting to believe that technofixes, like blockchain, will save the ocean and the people who depend upon it, more fundamental change is required. But as so often with our food supply chains, the answers are as elusive as they are obvious. We need to return to local, community-based supply chains if the ocean is to continue to sustain a growing world population. COVID-19’s impact on business as usual in this sector has provided a fertile ground for some community seafood systems to emerge in places like North America. Unfortunately however, the governance required to end IUU fishing, overfishing and destructive fishing practices, such as the use of Fish Aggregating Devices (FADs), would require a level of international cooperation that appears beyond our world’s current leaders.

If we continue along our current path, more people globally will need alternatives to wild fish, such as farmed fish (aquaculture) and other potentially unsafe alternatives. Farmed fish is the fastest growing area of food production in the world and while it is presented as a sustainable alternative to wild fish, it is far from the panacea it may seem. Farmed fish are dependent on feed made from the very wild fish they are meant to replace and the poor conditions in which they are kept leave them vulnerable to disease and parasites, such as the sea lice infecting farmed salmon. Farmed seafood can have high levels of antibiotics, which may lead to antibiotic resistance, one of the greatest threats to human health today.

For the poorest people of the world that cannot afford farmed seafood, a glimpse of a possible future can be seen in West Africa. Subsidised large fishing vessels from the European Union have moved to the waters off West Africa and have depleted the fish stocks there. Seafood is the largest source of protein in West Africa and as fish stocks become depleted increased consumption of bushmeat is necessary. Eating certain wildlife is not only a driver of biodiversity loss but can be also be a source of zoonotic diseases, such as Ebola and coronavirus. More of us are starting to become aware that our own health depends on the health of the planet and that food supply chains can no longer be considered independently of planetary health.

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This blog is written by Cabot Institute member Dr Lucy McCarthy and Lee Matthews and Anne Touboulic from the University of Nottingham Future Food Beacon. This blog post first appeared on the University of Nottingham Future Food Beacon blog. View the original blog.

Dr Lucy McCarthy

Read the other blogs in this series:

Putting algae and seaweed on the menu could help save our seafood

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This article was written by Pallavi AnandThe Open University and Daniela SchmidtUniversity of Bristol Cabot Institute. 


If we have to feed 9.8 billion people by 2050, food from the ocean will have to play a major role. Ending hunger and malnutrition while meeting the demand for more meat and fish as the world grows richer will require 60% more food by the middle of the century.But around 90% of the world’s fish stocks are already seriously depleted. Pollution and increasing levels of carbon dioxide (CO₂) in the atmosphere, which is making the oceans warmer and more acidic, are also a significant threat to marine life.There is potential to increase ocean food production but, under these conditions, eating more of the species at the top of the food chain, such as tuna and salmon, is just not sustainable. As a recent EU report highlighted, we should instead be looking at how we can harvest more smaller fish and shellfish, but also species that aren’t as widely eaten such as seaweed and other algae.The oceans have absorbed around one third of the CO₂ emitted into the atmosphere since the Industrial Revolution. The absorbed CO₂ goes through a series of chemical reactions that form carbonic acid and lower the pH of the water. These reactions also reduce the concentration of carbonate ions, which are vital for those creatures that grow external skeletons such as corals and shellfish.

The acid and the lack of carbonate mean these organisms form weaker skeletons and have to use more energy to do so, leaving less energy for growth and reproduction. Consequently, they up smaller in size. Aside from the impact this has on shellfish, several of the species affected, such as corals in the tropics or coralline algae in the waters around the UK, also play a key role in providing food and nursing grounds for fish. And less fish food leads to fewer fish for us to catch.

Climate change is affecting food production

The impact of ocean acidification varies widely across the globe. But it is already affecting marine food production, particularly of shellfish. For example, CO₂-rich water along the west coast of the US means more oysters in local hatcheries are dying when they are still larvae.
Warmer seas due to climate change are also affecting food supplies. Some species are moving towards the poles in search of cooler water, forcing fishermen into more northerly waters or leaving them without stocks altogether. Some fishing fleets in northern locations will find more fish available but many will see the amount of fish available to catch fall by between 6% and 30% depending on the region. The biggest impact will be on areas that are already the most dependent on fishing, such as Southeast Asia and West Africa.

One possible solution is to eat more smaller fish and shellfish such as mussels. Large fish need to eat smaller fish to grow. If we eat smaller fish instead then we remove a step from the food chain and reduce the amount of energy lost in the process. What’s more, it might become easier to farm these smaller fish because the algae, cyanobacteria and other plankton they eat could actually benefit from warmer waters and higher levels of CO₂ in the atmosphere. This is because they get their energy from photosynthesis and so use CO₂ like fuel.

Spirulina, the new seafood cocktail.
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It might also be possible to take this a step further and add some of these organisms directly to our diet, giving us an abundant new source of food. Seaweed, for example, is a type of algae that has been eaten for centuries, but only 35 countries commercially harvest it today. Spirulina cyanobacteria is already eaten as a food supplement and several companies are trying to turn other forms of algae into a human food source.

Farming these organisms in the right way could even help counter some of the effects of climate change on the rest of the food chain. For example, growing more seaweed lowers the amount of CO2 in the surrounding water, reduces acidification, and improves the environment for oysters and other shellfish. Managing seaweed harvest correctly will also maintain the dissolved oxygen and nutrient levels in the water, contributing to the overall health of the ocean.

The ConversationMaking algae a common part of more people’s diets won’t be easy. We need to ensure that any new algae food products on our dinner plates have the needed nutritional value but are also attractive and safe to eat. But sticking with our traditional salmon and tuna diet isn’t sustainable. Expanding our seafood menus could be a vital way of keeping the ocean healthy while it supplies the food we need.
Pallavi Anand, Lecturer in Ocean Biogeochemistry, The Open University and Daniela Schmidt, Professor in Palaebiology, University of Bristol

This article was originally published on The Conversation. Read the original article.