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  • Seasonality of Harvest. Estimating Harvest Functions for Bottom Trawlers for Cod

    Creator:
    Logstein, Rune
    Abstract:
    By using harvest data for a North East Arctic Cod Fishery in the Barents Sea for the years 1971-1985 a monthly and daily dimensional harvest function is estimated. The seasonal factors are investigated using dummy variables. The results indicate that the seasonality is embodied in the catch ability coefficient of...
    Resource Type:
    Research Paper
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    error term. However, the catch biomass elasticity turns out to be negative and significant when

  • The mixed bless of modern fishing technology

    Creator:
    Skonhoft, Anders
    Abstract:
    This paper formulates a simple biomass growth model of a fishery. The property rights regime is of the unregulated local common property type with a fixed number of fishermen and where the fish stock is exploited in a myopic profit-maximizing manner. Within this resource management setting it is demonstrated that...
    Resource Type:
    Research Paper
    Full Text:
    classification: Q22 Abstract This paper formulates a simple biomass growth model of a fishery. The

  • Discontinuous Sustainable Yield: The Exception or the Rule?

    Creator:
    Arnason, Ragnar
    Abstract:
    The sustainable yield function is a favoured tool in fisheries policy making. Normally, this function is drawn as a continuous curve in effort-yield space. This means that sustainable yield (harvest) is gradually reduced to zero as fishing effort increases. This, however, does not have to be the case. The sustainable...
    Resource Type:
    Research Paper
    Full Text:
    . It has long been recognized that depensatory biomass growth generally leads to discontinuous