Blar i forfatter "Skonhoft, Anders"

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    • Conservation of wildlife. A bio-economic model of a wildlife reserve under the pressure of habitat destruction and harvesting outside the reserve 

      Skonhoft, Anders; Armstrong, Claire W. (Working paper; Arbeidsnotat, 2003-09)
      Biodiversity is today threatened by many factors of which destruction and reduction of habitats are considered most important for terrestrial species. One way to counteract these threats is to establish reserves with restrictions on land-use and exploitation. However, very few reserves can be considered islands, wildlife species roam over large expanses, often via some density dependent dispersal ...

    • Marine reserves. A bio-economic model with asymmetric density dependent migration 

      Armstrong, Claire W.; Skonhoft, Anders (Working paper; Arbeidsnotat, 2004-10)
      A static bioeconomic model of a marine reserve is introduced, allowing asymmetric density dependent migration between the reserve and the fishable area. This allows for habitat or ecosystem differences within and outside a reserve not described in earlier studies. Four scenarios are studied; a) maximum harvest, b) maximum current profit, c) open access and d) maximum sustainable yield (MSY) in ...

    • Maximum Yield Fishing and Optimal Fleet Composition. A Stage Structured Model Analysis With an Example From the Norwegian North-East Arctic Cod Fishery 

      Helgesen, Irmelin Slettemoen; Skonhoft, Anders; Eide, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-01)
      A stage structured fishery model with three stages; recruits, immature fish and mature fish is formulated and utilized to analyse maximum sustainable yield (MSY) and optimal harvesting composition in a fishery with two heterogeneous fleets. The stage structured model developed bundles the age classes found in age structured models into stage classes based on their level of maturity, but also the ...

    • Middlemen: good for resources and fishermen? 

      Pham, Thi Thanh Thuy; Flaaten, Ola; Skonhoft, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-16)
      This paper studies the role of middlemen in open-access fisheries and how the organization of the supply chains affects resource exploitation and the level and distribution of economic rent. Imperfect competition among middlemen can help ensure that fish stocks are not depleted, which is typically the case in open-access fisheries with competitive markets. Middlemen with market power can also induce ...

    • On the economics of ecological nuisance 

      Schulz, Carl-Erik; Skonhoft, Anders (Working paper; Arbeidsnotat, 2005-03)
      This paper analyses the economics of pest and nuisance relating to wild animals. It studies stylised models where wild animals represent a direct nuisance to agricultural production through grazing and crop damage. Such damage is particularly relevant in poor rural communities, where people are dependent on livestock and crop production and at the same time are living close to nature and wildlife. ...