10.2190/NJL3-LG1E-5GF1-WT30 NJL3LG1E5GF1WT30 2 Effects of Limited Access Management on Substitutable Resources: A Case Study of the Surf Clam and Ocean Quahog Fishery 21 49 20020509 20020509 20020509 20020509 NJL3LG1E5GF1WT30.pdf http://baywood.metapress.com/link.asp?target=contribution&id=NJL3LG1E5GF1WT30 1 Sylvia J. Brandt Department of Systems Engineering, Case Western Reserve University, Ohio The tragedy of the commons and joint markets for natural resources present researchers with intriguing questions: What policies efficiently protect both primary and substitute resources? Why do some management policies produce counter-intuitive results? Fishery management is one example of regulating complex economic and ecological systems and provides case studies of policies used to correct the inefficiencies inherent in common property resources. Using the Mid-Atlantic surf clam and ocean quahog fishery as an example, this article models the effects of limited access policies on substitutable natural resources. The history of the surf clam and ocean quahog fishery illustrates the difficulties of managing common property and substitutable resources. The fishery is a complex system in which economic, ecological, and regulatory factors affect harvesting decisions for two substitutable resources. I model the profit-maximizing decisions made by individual vessel owners and illustrate how biological and economic parameters affect these closely linked clam populations. Using this model I simulate harvest patterns and populations of the two species under limited access management. B. McCay and C. Creed, Social Structure and Debates on Fisheries Management in the Atlantic Surf Clam Fishery, <i>Ocean and Shoreline Management, 13</i>, pp. 202, 1990. Mid-Atlantic Fishery Management Council, <i>Optimum Yield, Domestic Harvest, Domestic Annual Processing, Joint Venture Processing, and Total Allowable Level of Foreign Fishing Recommendations for Surf Clam and Ocean Quahog FMP</i>, pp. 11 and 27, 1990. Mid-Atlantic Fishery Management Council, <i>Amendment Eight: Fishery Management Plan for the Atlantic Surf Clam and Ocean Quahog Fishery</i>, pp. 22-25 and 79, 1988. I. Strand, J. Kirkley, and K. McConnell, Economic Analysis and the Management of Atlantic Surf Clams, <i>Economic Analysis for Fisheries Management Plans</i>, pp. 122-123, 1981. C. Clark, <i>Bioeconomic Modelling and Fisheries Management</i>, pp. 12, 1985. S. Murawski, Chief, Population Dynamics Branch, NMFS, Woods Hole, Massachusetts, personal communication, January 13, 1992. Fish and Wildlife Service, <i>Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (Mid-Atlantic)</i>, pp. 12, 1983. Bureau of Labor Statistics, ES-2-2 Program, <i>Employment and Wages, Annual Averages</i>, 1971-1990. Bureau of Economic Analysis, <i>Business Statistics: 1961-1988</i>, 1988. Mid-Atlantic Fishery Management Control, <i>Final Environmental Impact Statement</i>, pp. 32, 1977. H. Varian, <i>Microeconomic Analysis</i> (2nd Edition), pp. 28, 1984.