Meat production is projected to double by 2020 due to increased incomes, population growth, and rising per capita global consumption of meat. In order to meet this demand, industrialized animal production systems are proliferating and grain production for feed is expanding. These trends will have major consequences on 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.
Over the past quarter century, the salmon aquaculture industry has grown rapidly. Price declines caused by the resulting worldwide increase in salmon production have severely impacted the salmon fishing industry, particularly in Alaska. In this paper, we examine the reasons behind the success of farm salmon. In addition to its inherent market advantages, farm salmon has benefitted from a legal structure that limits the ability of the fishing industry to adjust to competition. We look at these fisheries laws and at the impacts of various policy options on the future economic, ecological, and political sustainability of the fishing industry.
A leading expert in environmental and natural resources law and policy, Barton H. “Buzz” Thompson, Jr., JD/MBA ’76 (BA ’72), has contributed a large body of scholarship on environmental issues ranging from the future of endangered species and fisheries to the use of economic techniques for regulating the environment. He is the founding director of the law school’s Environmental and Natural Resources Program, Perry L. McCarty Director and senior fellow of the Woods Institute for the Environment, and a senior fellow (by courtesy) at the Freeman Spogli Institute for International Studies. In 2008, the Supreme Court appointed Professor Thompson to serve as the special master in Montana v. Wyoming (137 Original). Professor Thompson is chairman of the board of the Resources Legacy Fund and the Resources Legacy Fund Foundation, a California trustee for The Nature Conservancy, and a board member of both the American Farmland Trust and the Sonoran Institute. He previously served as a member of the Science Advisory Board for the U.S. Environmental Protection Agency.
Before joining the Stanford Law School faculty in 1986, he was a partner at O’Melveny & Myers in Los Angeles and a lecturer at the UCLA School of Law. He was a law clerk to Chief Justice William H. Rehnquist ’52 (BA ’48, MA ’48) of the U.S. Supreme Court and Judge Joseph T. Sneed of the U.S. Court of Appeals for the Ninth Circuit.
Senior Fellow, Stanford Woods Institute for the Environment, and (by courtesy) the Freeman Spogli Institute for International Studies
Global aquaculture production is growing rapidly, with production more than doubling in weight and by value from 1989 to 1998. With many capture fisheries catches peaking, scientists, governments, and international organizations all point to aquaculture as the most important means to increase global fish supplies.
The aquaculture industry in the United States, which is dominated by freshwater catfish (Ictalurus punctatus) production, generates about one billion dollars each year. Marine aquaculture comprises roughly one-third of U.S. production by weight, and despite rapid increases in salmon and clam production, growth of U.S. marine aquaculture has been slow on average. Efforts to develop marine aquaculture in the open ocean could catalyze future growth.
Aquaculture has a number of economic and other benefits. But if it is done without adequate environmental safeguards it can cause environmental degredation. The main environmental effects of marine aquaculture can be divided into the following five categories:
1) Biological Pollution: Fish that escape from aquaculture facilities may harm wild fish populations through competition and interbreeding, or by spreading diseases and parasites. Escaped farmed Atlantic salmon (Salmo salar) are a particular problem, and may threaten endangered wild Atlantic salmon in Maine. In the future, farming transgenic, or genetically modified, fish may exacerbate concerns about biological pollution.
2) Fish for Fish Feeds: Some types of aquaculture use large quantities of wild-caught fish as feed ingredients, and thus indirectly affect marine ecosystems thousands of miles from fish farms.
3) Organic Pollution and Eutrophication: Some aquaculture systems contribute to nutrient loading through discharges of fish wastes and uneaten feed. Compared to the largest U.S. sources of nutrient pollution, aquaculture's contribution is small, but it can be locally significant.
4) Chemical Pollution: A variety of approved chemicals are used in aquaculture, including antibiotics and pesticides. Chemical use in U.S. aquaculture is low compared to use in terrestrial agriculture, but antibiotic resistance and harm to nontarget species are concerns.
5) Habitat Modification: Marine aquaculture spreads over 26,000 marine hectares, or roughly 100 square miles. Some facilities attract marine predators, and can harm them through accidental entanglement or intentional harassment techniques.
A number of technologies and practices are available to prevent or mitigate these environmental problems. Options to make U.S. aquaculture environmentally sustainable include:
Developing strong effluent guidelines for aquaculture under the Clean Water Act;
Supporting National Marine Fisheries Service and Fish and Wildlife Service activities under the Endangered Species Act to protect wild Atlantic salmon;
Establishing an environmentally protective permitting program for offshore aquaculture;
Improving state oversight of aquaculture;
Championing research and development investments and cost-share incentives for sustainable aquaculture practices;
Establishing a federal approval process for transgenic fish that mandates evnironmental protection;
Supporting market incentives for environmentally sound fish-farming;
Developing bilateral agreements with Canada to study and minimize the impact of salmon-farming on wild salmon stocks
Global production of farmed fish and shellfish has more than doubled in the past 15 years. Many people believe that such growth relieves pressure on ocean fisheries, but the opposite is true for some types of aquaculture. Farming carnivorous species requires large inputs of wild fish for feed. Some aquaculture systems also reduce wild fish supplies through habitat modification, wild seedstock collection and other ecological impacts. On balance, global aquaculture production still adds to world fish supplies; however, if the growing aquaculture industry is to sustain its contribution to world fish supplies, it must reduce wild fish inputs in feed and adopt more ecologically sound management practices.
Rosamond Naylor is the William Wrigley Professor in Earth System Science, a Senior Fellow at Stanford Woods Institute and the Freeman Spogli Institute for International Studies, the founding Director at the Center on Food Security and the Environment, and Professor of Economics (by courtesy) at Stanford University. She received her B.A. in Economics and Environmental Studies from the University of Colorado, her M.Sc. in Economics from the London School of Economics, and her Ph.D. in applied economics from Stanford University. Her research focuses on policies and practices to improve global food security and protect the environment on land and at sea. She works with her students in many locations around the world. She has been involved in many field-level research projects around the world and has published widely on issues related to intensive crop production, aquaculture and livestock systems, biofuels, climate change, food price volatility, and food policy analysis. In addition to her many peer-reviewed papers, Naylor has published two books on her work: The Evolving Sphere of Food Security (Naylor, ed., 2014), and The Tropical Oil Crops Revolution: Food, Farmers, Fuels, and Forests (Byerlee, Falcon, and Naylor, 2017).
She is a Fellow of the Ecological Society of America, a Pew Marine Fellow, a Leopold Leadership Fellow, a Fellow of the Beijer Institute for Ecological Economics, a member of Sigma Xi, and the co-Chair of the Blue Food Assessment. Naylor serves as the President of the Board of Directors for Aspen Global Change Institute, is a member of the Scientific Advisory Committee for Oceana and is a member of the Forest Advisory Panel for Cargill. At Stanford, Naylor teaches courses on the World Food Economy, Human-Environment Interactions, and Food and Security.
Although many fisheries stocks have declined precipitously throughout the world, fish farming--and especially shrimp and salmon farming--has boomed. The increasingly large scale of these enterprises is now having unforeseen ecological consequences on ocean resources through habitat destruction, effluent discharge, exotic species introductions, and heightened fish catch for feed use. Ending unsustainable production practices will require reorienting regulatory policies and fiscal incentives in shrimp- and salmon-producing counties, and enhancing restrictions on environmentally unsound practices.
