Fisheries

Forage fish supplies are limited and pressure on them is increasing, in large part due to China’s dominant demand for fishmeal for aquaculture feeds. Given the limited nature of global marine resources and aquaculture’s increasing share of fishmeal and fish oil consumption, understanding feed consumption trends in the Chinese aquaculture industry is essential to creating effective strategies for reducing the demand for reduction fishery products.

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Aquaculture’s pressure on forage fisheries remains hotly contested. This article reviews trends in fishmeal and fish oil use in industrial aquafeeds, showing reduced inclusion rates but greater total use associated with increased aquaculture production and demand for fish high in long-chain omega-3 oils. The ratio of wild fisheries inputs to farmed fish output has fallen to 0.63 for the aquaculture sector as a whole but remains as high as 5.0 for Atlantic salmon. Various plant- and animal-based alternatives are now used or available for industrial aquafeeds, depending on relative prices and consumer acceptance, and the outlook for single-cell organisms to replace fish oil is promising. With appropriate economic and regulatory incentives, the transition toward alternative feedstuffs could accelerate, paving the way for a consensus that aquaculture is aiding the ocean, not depleting it.

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Journal Articles
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Proceedings of the National Academy of Sciences (PNAS)
Authors
Rosamond L. Naylor
Rosamond L. Naylor
Ronald W. HardyRonald W. Hardy
Dominique P. Bureau
Alice Chiu
Matthew Elliott
Anthony P. Farrell
Ian Forster
Delbert M. Gatlin
Rebecca J. Goldburg
Katheline Hua
Peter D. Nichols
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Affiliated scholar
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Dane Klinger is the Director of Biology at Forever Oceans Corporation, an aquaculture technology startup. As an interdisciplinary environmental scientist and marine biologist, Dane has worked for and with businesses, foundations, universities, policymakers, and NGOs in the United States and abroad to develop innovation solutions to a range of challenges in commercial aquaculture and the global seafood trade. He holds a Ph.D. from Stanford University and was a postdoctoral researcher at Princeton University.

 

Shorenstein APARC
Stanford University
Encina Hall E301
Stanford, CA 94305-6055

(650) 725-5781 (650) 723-6530
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Visiting Scholar, 2008-09
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Oh Eul Kwon has been the Policy Deputy-Chairman of the Grand National Party in Korea and served in many committees of the party: the Chairman of Agriculture, Forestry, Marine Affairs and Fisheries Committee; Member of Government Administration and Local Autonomy Committee; Chief of Politics Reform Special committee of Grand National Party; Member of Culture & Tourism Committee.

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Ashley Dean
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This past autumn, the Freeman Spogli Institute ( FSI ) in conjunction with the Woods Institute for the Environment launched a program on Food Security and the Environment (FSE) to address the deficit in academia and, on a larger scale, the global dialogue surrounding the critical issues of food security, poverty, and environmental degradation.

“Hunger is the silent killer and moral outrage of our time; however, there are few university programs in the United States designed to study and solve the problem of global food insecurity,” states program director Rosamond L. Naylor. “FSE’s dual affiliation with FSI and Stanford’s new Woods Institute for the Environment position it well to make significant steps in this area.”

Through a focused research portfolio and an interdisciplinary team of scholars led by Naylor and Center for Environmental Science and Policy (CESP) co-director Walter P. Falcon, FSE aims to design new approaches to solve these persistent problems, expand higher education on food security and the environment at Stanford, and provide direct policy outreach.

Productive food systems and their environmental consequences form the core of the program. Fundamentally, the FSE program seeks to understand the food security issues that are of paramount interest to poor countries, the food diversification challenges that are a focus of middle-income nations, and the food safety and subsidy concerns prominent in richer nations.

CHRONIC HUNGER IN A TIME OF PROSPERITY

Although the world’s supply of basic foods has doubled over the past century, roughly 850 million people (12 percent of the world’s population) suffer from chronic hunger. Food insecurity deaths during the past 20 years outnumber war deaths by a factor of at least 5 to 1. Food insecurity is particularly widespread in agricultural regions where resource scarcity and environmental degradation constrain productivity and income growth.

FSE is currently assessing the impacts of climate variability on food security in Asian rice economies. This ongoing project combines the expertise of atmospheric scientists, agricultural economists, and policy analysts to understand and mitigate the adverse effects of El Niño-related climate variability on rice production and food security. As a consequence of Falcon and Naylor’s long-standing roles as policy advisors in Indonesia, models developed through this project have already been embedded into analytical units within Indonesia’s Ministries of Agriculture, Planning, and Finance. “With such forecasts in hand, the relevant government agencies are much better equipped to mitigate the negative consequences of El Niño events on incomes and food security in the Indonesian countryside,” explain Falcon and Naylor.

FOOD DIVERSIFICATION AND INTENSIFICATION

With rapid income growth, urbanization, and population growth in developing economies, priorities shift from food security to the diversification of agricultural production and consumption. “Meat production is projected to double by 2020,” states Harold Mooney, CESP senior fellow and an author of the Millennium Ecosystem Assessment. As a result, land once used to provide grains for humans now provides feed for hogs and poultry.

These trends will have major consequences for the global environment—affecting the quality of the atmosphere, water, and soil due to nutrient overloads; impacting marine fisheries both locally and globally through fish meal use; and threatening human health, as, for example, through excessive use of antibiotics.

An FSE project is analyzing the impact of intensive livestock production and assessing the environmental effects to gain a better understanding of the true costs of this resource-intensive system. A product of this work recently appeared as a Policy Forum piece in the December 9, 2005, issue of Science titled "Losing the Links Between Livestock and Land."

Factors contributing to the global growth of livestock systems, lead author Naylor notes, are declining feed-grain prices, relatively inexpensive transportation costs, and trade liberalization. “But many of the true costs remain largely unaccounted for,” she says, including destruction of forests and grasslands to provide farmland for feed crops destined not for humans but for livestock; utilization of large quantities of freshwater; and nitrogen losses from croplands and animal manure.

Naylor and her research team are seeking better ways to track all costs of livestock production, especially hidden costs of ecosystem degradation and destruction. “What is needed is a re-coupling of crop and livestock systems,” Naylor says, “if not physically, then through pricing and other policy mechanisms that reflect social costs of resource use and ecological abuse.” Such policies “should not significantly compromise the improving diets of developing countries, nor should they prohibit trade,” Naylor adds. Instead, they should “focus on regulatory and incentive-based tools to encourage livestock and feed producers to internalize pollution costs, minimize nutrient run-off, and pay the true price of water.”

LOOKING AHEAD

The future of the program on Food Security and the Environment looks bright and expansive. Building on existing research at Stanford, researchers are identifying avenues in the world’s least developed countries to enhance orphan crop production— crops with little international trade and investment, but high local value for food and nutrition security. This work seeks to identify advanced genetic and genomic strategies, and natural resource management initiatives, to improve orphan crop yields, enhance crop diversity, and increase rural incomes through orphan crop production.

Another priority research area is development of biofuels. As countries seek energy self-reliance and look for alternatives to food and feed subsidies under World Trade Organization (WTO) rules, the conversion of corn, sugar, and soybeans to ethanol and other energy sources becomes more attractive. New extraction methods are making the technology more efficient, and high crude oil prices are fundamentally changing the economics of biomass energy conversion. A large switch by key export food and feed suppliers, such as the United States and Brazil, to biofuels could fundamentally alter export prices, and hence the world food and feed situation. A team of FSE researchers will assess the true costs of these conversions.

The FSE program recently received a grant through the Presidential Fund for Innovation in International Studies to initiate new research activities. One project links ongoing research at Stanford on the environmental and resource costs of industrial livestock production and trade to assess the extent of Brazil’s rainforest destruction for soybean production. “Tens of millions of hectares of native grassland and rainforest are currently being cleared for soybean production to supply the global industrial livestock sector,” says Naylor. An interdisciplinary team will examine strategies to achieve an appropriate balance between agricultural commodity trade, production practices, and conservation in Brazil’s rainforest states.

“I’m extremely pleased to see the rapid growth of FSE and am encouraged by the recent support provided through the new Presidential Fund,” states Naylor. “It enables the program to engage faculty members from economics, political science, biology, civil and environmental engineering, earth sciences, and medicine—as well as graduate students throughout the university—in a set of collaborative research activities that could significantly improve human well-being and the quality of the environment.”

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Former PhD student, Emmett Interdisciplinary Program in Environment & Resources
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Andy earned his doctorate in the Emmett Interdisciplinary Program in Environment and Resources at Stanford University where he studied the Chilean salmon farming industry to understand human relationships with marine environments. He is in the process of writing an environmental and social history of the industry.

Before coming to Stanford, he researched aquaculture policy with Dr. Becky Goldburg at The Environmental Defense Fund; instructed in and administered marine science education programs at the Catalina Island Marine Institute; and worked for the National Marine Fisheries Service in the Alaskan pollock and California drift-gillnet swordfish fisheries.

Previously he attended the Colorado College as a Boettcher scholar to study environmental science, history and literature. His interest in environmental studies largely coalesced during a year spent teaching at Uthongathi School in Kwa-Zulu Natal, South Africa.

Most reduction fisheries that produce fishmeal and fish oil have already reached or exceeded sustainable catch levels and will be placed under further pressure as the aquaculture industry grows. At the same time that research into alternative sources of nutrition for piscivorous aquaculture species is progressing, several laws and regulations are taking shape that address the issue of aquaculture feed practices, including the U.S. National Offshore Aquaculture Act (H.R. 2010, S. 1609), the California Sustainable Oceans Act (SB 201), and the development of organic aquaculture standards by the National Organic Standards Board (NOSB). Other nations with expanding aquaculture industries are also beginning to take notice of this issue and are investigating alternative feed sources.

At this pivotal time, the Stanford meeting will bring together a small group of forward-thinking researchers, environmental non-profits, aquaculture producers, feed developers, and others who are striving toward sustainable feed solutions. The goal is to develop recommendations and a guiding direction for achieving sustainable feed inputs, incorporating current science, economics, and policy. The meeting seeks to:

  • Analyze current and future feed demands in the marine aquaculture sector. What percentage of fishmeal and fish oil inclusion is typical in feeds, and how much can that percentage be reduced?
  • Assess the role of conventional fishmeal and fish oil and alternative sources of nutrition, such as krill, algae, other microbes, terrestrial plants, by-catch, and seafood and poultry processing wastes, both now and in the future. What are the prospects for continued use of wild-caught fish and how can these conventional feed sources be used more responsibly? What are the environmental impacts of each of the resources? What is the state of scientific knowledge, development, and availability of alternatives? How will market dynamics impact the transition from fishmeal and fish oil to alternative proteins and oils?
  • Identify research needs and areas of high promise. Discuss how to encourage the research, development, and use of sustainable, alternative feed ingredients in aquaculture.

We hope the meeting will facilitate the cross-fertilization of ideas on sustainable feeds from people in different sectors and begin to provide some clarity and direction useful to policymakers. Although many experts have acknowledged the problem of increasing feed demands, and while alternative feed sources are a growing research field, there are few specific recommendations on how to achieve sustainable feed inputs. From the discussion at this workshop, we intend to produce specific recommendations to guide legislation and regulation on feeds, with the goal of improving the sustainability of aquaculture feed practices.

FSE - Stanford University

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The use of chemical fertilizers in developing countries made possible the Green Revolution, and as a result many regions once visited by periodic famines are now food self-sufficient. However, there is a growing recognition that the injudicious use of chemical fertilizers may have adverse environmental consequences including toxic algal blooms and damage to productive ocean fisheries.

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