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Filtering by: Creator Rinehold, John W. Remove constraint Creator: Rinehold, John W. Conference Name International Institute of Fisheries Economics & Trade Remove constraint Conference Name: International Institute of Fisheries Economics & Trade

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  • Optimal Batch Lengths for Barramundi Farming Under Seasonal Variations: A Dynamic Programming Approach

    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
    Full Text:
    VARIATIONS: A DYNAMIC PROGRAMMING APPROACH Jagath W. Rupasinghe Department of Fisheries and Aquaculture

  • The Benefit of Hindsight; An Evaluation of North Sea Herring Management Plans From 1995 to the Present

    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

  • Conservation for Sale: A Dynamic Common Agency Model of Natural Resource Regulation

    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

  • Enforcement Program Optimisation Through Adaptive Management

    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

  • Bringing Fisheries and Aquaculture into Coordinated Global and Regional Assessments of Food and Nutritional Security

    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

  • Fisheries in a Complex System

    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

  • A Simple Buy-back Auction for Fisheries Management

    Creator:
    Ledyard, John and Groves, Ted
    Abstract:
    In an open fishery, the competition for the limited fish stock can lead fishermen to a ``race for fish" with sub-optimally high capital investments. Buyback programs to reduce excess capacity in national fisheries have been often used, but seldom successful. Where they have successfully reduced excess capacity, the programs have...
    Resource Type:
    Presentation
    Full Text:
    Auction for Fisheries Management Ted Groves, UCSD John Ledyard, Caltech Background (Assume: Bjorndal

  • Fishing in a Shallow Lake: A Case for Effort Controls?

    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:
    FOR EFFORT CONTROLS?John JanmaatUniversity of British Columbia Okanagan, E onomi s, IK Barber S hool

  • The Stability of Rent Maximization in the Western and Central Pacific Fishery

    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

  • Measuring Capacity of the New England Otter Trawl Fleet

    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