· 7 min read
The term "blue food" describes a wide range of foods that come from aquatic habitats, such as fish, shellfish, seaweed, and other marine life. This food group is becoming more well-known for its ability to significantly improve nutritional demands and global food security. By leveraging the abundance of marine resources, the concept of "blue food" holds significant potential for advancing sustainability and enhancing global food security. As nutrient-dense food sources, they can diversify the food supply, especially with the use of techniques like seaweed and bivalve aquaculture. Traditional land-based agriculture can be less stressed, fostering a more robust global food system.
Source: “What are blue foods?", Purdue University
The health benefits of blue foods for both humans and the environment have also been demonstrated by initiatives that enhance resilience to climate change through sustainable practices. Blue foods have the potential to enhance resilient food systems, reduce environmental impacts, and improve the health of billions of people globally by emphasising sustainable practices and encouraging international cooperation.
Importance of blue food
Blue foods are essential to the lifestyles, economics, and cultures of many coastal and riparian communities and the food and nutritional security of billions of people. They are remarkably diverse, often contain vital micronutrients and fatty acids, and can be produced using more environmentally friendly methods than diets derived from land-based animals. By 2030, it is anticipated that blue foods will account for an average of 27% of omega-3 fatty acids and 100% of vitamin B12 worldwide. It is especially critical to address inadequacies in more vulnerable populations, like pregnant women, women of childbearing age, elderly individuals, and small children.
Blue foods have significant potential to help nations achieve the Sustainable Development Goals (SDGs), such as No Poverty (SDG 1), Zero Hunger (SDG 2), Health and Well-being (SDG 3), Responsible consumption and production (SDG 12), Climate change (SDG 13), and Life below water (SDG 14), due to their diverse economic, social, and ecological impacts. They can make a significant difference because they have a smaller carbon footprint than conventional animal protein. For example, farmed salmon has a carbon footprint of less than 5% of that of boneless beef, making it a simple move to lessen the environmental impact of our diets.
The blue economy focuses on using ocean resources to promote social progress, economic expansion, and environmental protection. To protect fish populations, maintain ocean biodiversity, and ensure that marine resources are exploited at levels that permit regeneration, science-based management techniques must be implemented. Fishing is vital to the economies of many coastal villages and island nations, employing an estimated 33 million people in wild capture fishing alone. Among the most traded commodities in the world, blue foods support an estimated 800 million people worldwide.
The environmental impact of blue food production
Greenhouse gas (GHG) emissions from blue foods are often far lower than those from terrestrial meats. Bivalves and seaweeds are examples of unfed aquaculture systems that have low greenhouse gas emissions and minimum freshwater and land input requirements. Compared to the production of ruminant meat, even fed aquaculture systems frequently have a lower carbon footprint, making blue foods a more sustainable source of protein.
Sustainable management of the production of blue foods, which mainly consists of aquaculture and seafood, has several effects on the environment. Aquaculture helps to maintain fish populations by lowering the need to capture more wild fish to satisfy the growing demand for seafood. Additionally, we may lessen the strain of land-based farming by eating more food from aquaculture.
However, about 34.2% of fish populations are overfished, 59.6% are being fished at the highest sustainable levels, and 30 to 35% of fish harvested are wasted or lost. This unsustainable practice jeopardises aquatic ecosystem health and marine biodiversity. The biggest threats are to major seafood-producing nations like the United States, China, and Norway, which might jeopardise the safety and security of food for the more than 3.2 billion people who depend on these resources. Environmental stressors affect both the safety and quantity of blue foods produced. Contaminants such as pesticides, heavy metals, and diseases can harm aquatic life, potentially endangering human consumers.
Although some fishing methods raise concerns about biodiversity loss, ecological balance can be preserved by prudent management of blue food supplies. When appropriately managed, sustainable aquaculture can improve local biodiversity and restore habitats. Aquatic habitats naturally filter certain blue foods, especially shellfish like mussels and oysters. By eliminating excess nutrients and contaminants, they enhance the quality of the water, which is beneficial for the general well-being of marine habitats. For instance, Canada has adopted shellfish farming methods that benefit nearby people economically while also assisting in the restoration of coastal habitats.
Sustainable practice
The long-term sustainability of marine ecosystems and biodiversity can be guaranteed by supporting and rewarding sustainable fishing, aquaculture, and seaweed farming methods. Investing in blue food production technology research and development, such as integrated multi-trophic aquaculture, aquaponics, and sustainable seafood processing, can increase output while reducing environmental effects. Reducing emissions from fishing operations can lessen the sector's contribution to climate change while increasing efficiency, promoting climate-adaptive livelihoods and practices for fishermen and fishing communities will further increase resilience against the short- and long-term effects of climate change, and developing sustainable and climate-adaptive fisheries management that help maintain fish stocks and ecosystems in the face of changing environmental conditions.
Aquaculture's environmental impact can be significantly reduced, and opportunities for sustainable growth in blue-food farming can be created by aquafeeds that substitute sustainable ingredients like plant-based proteins, agricultural by-products, and microbial for conventional fishmeal and oil.
Supporting local economies and improving sustainability can be achieved by providing small-scale fishermen with fair trading practices, training, and equal access to resources. The current methods of processing blue foods, including aquaculture and fishing for production and manual processing upon landing, are not environmentally sustainable, scalable, or efficient enough. As a result, numerous new technologies, including freeze drying, high-pressure processing, and ultrasound-assisted extraction, are being created and used to deal with these issues.
Challenges
Despite the potential benefits of blue foods, several challenges hinder the blue food sustainability and impact. For a start, by undermining attempts at sustainability and fisheries management, overfishing and illicit, unreported, and unregulated (IUU) fishing are making ecosystem degradation and fish stock decline worse. Water quality, marine biodiversity, and aquatic species' health are all impacted by pollution from land-based sources, such as plastic waste, agricultural runoff, and industrial pollutants, which also contribute to marine pollution and habitat destruction.
Climate change puts blue food systems at serious risk, just like it does for other food systems. It will progressively jeopardise fish stocks' and aquatic ecosystems' productivity and health in many nations. Ocean warming and deoxygenation cause changes in species productivity and distribution, which have an impact on pelagic fisheries. Ocean acidification and heat waves damage bivalve productivity and coral reef fisheries.
Even if technical developments have the potential to make blue food production more sustainable, more funding for research and development is still required. Sustainable management of maritime resources requires strong local, national, and international governance. However, insufficient management frameworks, conflicting laws, and lax enforcement hinder the development of sustainable blue food systems.
Pathways for sustainable future
To ensure the long-term economic viability of blue foods, it is essential to develop emerging markets. Policymakers should focus on expanding the market for blue food products by fostering infrastructure growth, improving market accessibility, and highlighting the advantages of blue foods for the environment and human health. In order to promote sustainable activities, a favourable financial and educational environment must be established. Initiatives that show a dedication to sustainability and innovation in the blue food industry should get financial incentives like grants, low-interest loans, and subsidies.
To increase adaptability and resilience in communities that depend on aquatic resources, blue food industry stakeholders need to strengthen their collaborations. This includes funding aquaculture and small-scale fishing, which are important to regional economies. Ultimately, educating consumers about sustainable seafood choices can boost the demand for responsibly sourced blue foods.
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