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Creator:: Rupasinghe, Jagath W. and Kennedy, John O.S.
Abstract:: Key decision variables in aquaculture management are stocking level, feeding schedule, temperature control and batch length. In many management problems with an infinite planning horizon, the aim is to find the batch length which results in maximum return if the same batch length applies to all future batches. This may...
Resource Type:: Research Paper
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Creator:: Simmonds, John and Anderson, John
Abstract:: In 1995 North Sea herring was estimated to have declined from previous high of around 1.5 million to 400,000 tonnes, the point at which significant reduction in recruitment had previously been observed. The response to this was to cut the fishery by reducing the human consumption TAC by 50% and...
Resource Type:: Research Paper
Full Text:: THE PRESENT. John Simmonds and John Anderson European Commission, Joint Research Centre, IPSC

Creator:: Boyce, John R.
Abstract:: This paper considers the regulation of a natural resource within a dynamic common agency framework. In setting harvest quotas, the regulator responds to lobbying pressure (contributions) from harvesters and conservationists. The truthful Markov perfect equilibrium stock is then an increasing function of the effective political weight for conservationists. Since the...
Resource Type:: Conference Proceeding
Full Text:: Natural Resource Regulation* John R. Boyce Department of Economics University of Calgary 2500

Creator:: McKinlay, John P.
Abstract:: Western Australia operates a diverse enforcement and education program aimed at achieving high compliance in a wide range of commercial and recreational fisheries managed using a mix of input and output controls. Since enforcement resources are invariably insufficient to totally eliminate non-compliance with fishery rules, it is important to ensure...
Resource Type:: Research Paper
Full Text:: Management John P. McKinlay Department of Fisheries, Western Australian Marine Research Laboratories PO Box

Creator:: Janmaat, John and Ruijs, Arjan
Abstract:: In many situation, fishing activity adversely impacts the state of the marine ecosystem, impacts which feed back to affect fish stocks. Some ecosystems appear to have multiple equilibria and exhibit hysteresis, whereby they can become stuck in low productivity states. We show how adding ecosystem dynamics to a classic fisheries...
Resource Type:: Research Paper
Full Text:: Journal ofE onomi s, 20(1):74�85, February 1987.[6℄ Louis W. Botsford, Juan Carlos Castilla, and Charles H

Creator:: Antle, John and Capalbo, Susan M.
Abstract:: Assessment studies have summarized the literature on global food security and projected impacts of climate and other major drivers of regional and global change in the 21st Century (IPCC, USDA). Additionally, the Agricultural Model Inter-comparison and Improvement Project (AgMIP) is working to develop new coordinated global and regional assessments of...
Resource Type:: Presentation
Full Text:: into Coordinated Global and Regional Assessments of Food and Nutritional Security John Antle and

Creator:: Kennedy, John and Hannesson, Rögnvaldur
Abstract:: The potential for achieving sustainable and efficient harvesting of three species of migratory tuna in the Western and Central Pacific Ocean is examined. The stocks reside in exclusive economic zones (mainly those of Pacific island countries) and in the high seas. Most harvesting is carried out by distant water fishing...
Resource Type:: Research Paper
Full Text:: Proceedings THE STABILITY OF RENT MAXIMIZATION IN THE WESTERN AND CENTRAL PACIFIC FISHERY* John

Creator:: Finoff, David and Tschirhart, John
Abstract:: An important subset of natural resource management addresses preserving and/or harvesting biological resources. Examples are policies that derive from the Endangered Species Act including habitat conservation plans, the U.S. Forest Service’s logging practices, and fishery management councils’ decisions regarding catches. To understand the effectiveness of management policies requires an understanding...
Resource Type:: Conference Proceeding
Full Text:: Fisheries in a Complex Ecosystem David Finoff John Tschirhart Department of Economics and Finance

Creator:: Walden, John B. and Kirkley, James
Abstract:: Measurement of capacity in marine fisheries is an important activity. An economic definition of capacity is the output level corresponding to the tangency between the long-run and short-run average cost curves. A technological-engineering definition is the maximum output per unit of time provided variable inputs are unrestricted. Although cost data...
Resource Type:: Conference Proceeding
Full Text:: 2000 Proceedings Measuring Capacity of the New England Otter Trawl Fleet John B. Walden, National

Creator:: Isaksen, John R. and Dreyer, Bent
Abstract:: The supply of raw material to the Norwegian fish processing industry has always fluctuated heavily, both as far as volumes and quality are concerned. These fluctuations have had major impact on planning of for instance product mix and production capacity. Thus, sea farming has been considered a promising alternative source...
Resource Type:: Research Paper
Full Text:: firms John R. Isaksen and Bent Dreyer Norwegian Institute of Fisheries and Aquaculture Research, N-9291

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