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  • Sustainable Yields for Ecosystems. A Mathematical Viability Approach

    Creator:
    De Lara, Michel, Ocana, Eladio, Oliveros-Ramos, Ricardo, and Tam, Jorge
    Abstract:
    We define the notion of sustainable yields for ecosystem, with particular emphasis on long-run consistency between ecological and economic conflicting objectives. We provide a way to compute sustainable yields by means of a viability analysis of generic ecosystem models with harvesting. We apply our approach to a Lotka–Volterra model of...
    Resource Type:
    Research Paper
    Full Text:
    , Journal of Dynamical Control Systems 1 (1995) 1–48. [10] D. Bertsekas, I. Rhodes, On the minimax

  • Landing Fees vs. Harvest Quotas with Uncertain Fish Stock

    Creator:
    Weitzman, Martin L.
    Abstract:
    The paper analyzes the relative performance of two market-based fisheries management instruments in the presence of a stochastic stock-recruitment relation. Regulators are forced to choose either a fee per fish landed or a quota on the total fish harvest – at a time when they are uncertain what will be...
    Resource Type:
    Conference Proceeding
    Full Text:
    ’ note: A revised version of this paper is forthcoming in the Journal of Environmental Economics and

  • The Management of Fishery in the Lagoon of Venice

    Creator:
    Rossetto, Luca
    Abstract:
    Recently, Mediterranean lagoon environment, mainly in the North Adriatic area, has been threatened by the overexploitation of fishery. Fishing has been rapidly growing since clam (Tapes phippinarum) fishery has spread over several lagoons. Fishing growth has been accomplished by capital-intensive fishery equipments increasing harvesting beyond the sustainable biological growth. This...
    Resource Type:
    Conference Proceeding
    Full Text:
    unavoidable environmental impacts not only on morphology, sediment and biology of the specific site but also

  • A Lecture Note on the Economics of Fish Stock Investment

    Creator:
    Flaaten, Ola
    Abstract:
    The aim of this paper is to assist teaching undergraduate students how to analyse the issue of fish stock investment. The mathematical prerequisites are a basic knowledge of calculus. Both discrete and continuos time frameworks are used. To fish down or to build up a fish stock takes time, and...
    Resource Type:
    Research Paper
    Full Text:
    fish stock investment. The mathematical prerequisites are a basic knowledge of calculus. Both discrete

  • Economic Impacts of Hypoxia on North Carolina Brown Shrimp

    Creator:
    Huang, Ling, Nichols, Lauren A. B., Craig, J. Kevin, and Smith, Martin D.
    Abstract:
    While environmental stressors such as hypoxia (low dissolved oxygen) are perceived as a threat to the productivity of coastal ecosystems, policy makers have little information about the economic consequences for fisheries. Prior studies based on data aggregated at relatively large spatial (e.g.,1000s km) and temporal (e.g., annual) scales have typically...
    Resource Type:
    Research Paper
    Full Text:
    demand model. Section 3 describes the North Carolina shrimp fishery, the biology of brown shrimp and the

  • The Collapse of the Atlanto-Scandian Herring Fishery: Effects on the Icelandic Economy

    Creator:
    Sigurdsson, Thorir
    Abstract:
    After 1950 traditional herring fisheries were revolutionized by a new technique: sonar, power block, larger nets and bigger boats. As a result all major herring stocks in the North East Atlantic Ocean collapsed. The most dramatic decline was that of the Atlanto-Scandian stock between Iceland and Norway from millions of...
    Resource Type:
    Research Paper
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    fishery. Canadian Journal of Economics, pp. 74-85, February 1987. Dragesund, O. et al. (1980

  • Ecosystems at Risk: The Contribution of Ecosystem Approaches to Fisheries to Identify Problems and Evaluate Potential Solutions

    Creator:
    Christensen, Villy, Villanueva, Maria Concepcion, and Aiken, Karl A.
    Abstract:
    The wide expanse of the sea, the inter-linkages among, and the productivity of its resources have until recently led most researchers to consider it unrealistic that humans could have more than local impact on marine ecosystems and their biodiversity. This perception is changing, however, as more evidence of the scale...
    Resource Type:
    Research Paper
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    productivity on Steller sea lions (Eumetopias jubatus) in Alaska. Canadian Journal Of Fisheries And Aquatic

  • Using evolutionary economics to explain predator-prey anomalies in the fisheries or explaining micky mouse's ears

    Creator:
    Wilson, James R.
    Abstract:
    The development of several sub-fields of general economics, including those of bounded rationality, institutional economics and the evolutionary economics, has expanded the scope and intensity of the dialogue both within economics, as well as between economists and other scientists. One of the more important preoccupations of early evolutionary economics was...
    Resource Type:
    Research Paper
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    Bjomdal, Trond and Jon M. Cunrad. 1987a, "The Dynamics of an Open Access Fishery" Canadian Journal of

  • The development and prospect of the aquaculture in Asia

    Creator:
    Sun, Chen
    Abstract:
    Asia has made and is making great contribution to the world aquaculture industry and fisheries civilization. The article analyzes development of the aquaculture in Asia with the production potentiality and comparative advantage index. It gets the conclusion that the aquaculture in Asia industry has promising prospect. And at last the...
    Resource Type:
    Research Paper
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    some concerned issues, including the diversity of biology, the protection of the environment and the

  • Biological information, profitability of fisheries and lease and asset prices for ITQs in Iceland

    Creator:
    Danielsson, Asgeir
    Abstract:
    Fisheries economists have studied fisheries managed with ITQs and compared them to fisheries that are differently managed. Most of these studies have found ITQs to be economically superior. This paper studies the ITQ-fisheries in Iceland. It focuses on features that are difficult to explain using traditional fisheries economics. It is...
    Resource Type:
    Research Paper
    Full Text:
    at the end of the year (as estimated at the beginning of 2001) was 552,000 tons. The biology is