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• 1. [Article] Growth Overfishing

  Growth overfishing squanders large parts of the potential rents in fisheries. Many of today’s fisheries are characterized by a severely truncated age-distribution, which in addition may have irreversible ...

  Citation × Citation Citation Abstract Copy Title: Growth Overfishing Author: Diekert, Florian K. Growth overfishing squanders large parts of the potential rents in fisheries. Many of today’s fisheries are characterized by a severely truncated age-distribution, which in addition may have irreversible ecological consequences. Nevertheless, the implications of age-differentiated harvesting for management have received surprisingly little attention in the literature. In the present paper, optimal and non-cooperative exploitation paths for a generic age-distributed resource are derived. We show that, in the case of perfect selectivity, competition between two agents is sufficient to dissipate all rents. Akin to the classical Bertrand competition in prices, each agent has an incentive to target fish at a younger age. That is, the “race to fish” extends to the dimension of age. This observation is crucial also with respect to management: Individual quotas are not able to restore efficiency unless accompanied by gear regulation. Moreover, it turns out that quotas specified in terms of numbers are far superior to those specified in terms of volume or value. Title: Growth Overfishing Author: Diekert, Florian K. Growth overfishing squanders large parts of the potential rents in fisheries. Many of today’s fisheries are characterized by a severely truncated age-distribution, which in addition may have irreversible ecological consequences. Nevertheless, the implications of age-differentiated harvesting for management have received surprisingly little attention in the literature. In the present paper, optimal and non-cooperative exploitation paths for a generic age-distributed resource are derived. We show that, in the case of perfect selectivity, competition between two agents is sufficient to dissipate all rents. Akin to the classical Bertrand competition in prices, each agent has an incentive to target fish at a younger age. That is, the “race to fish” extends to the dimension of age. This observation is crucial also with respect to management: Individual quotas are not able to restore efficiency unless accompanied by gear regulation. Moreover, it turns out that quotas specified in terms of numbers are far superior to those specified in terms of volume or value. Close

• 2. [Article] Market-Based Size Selection in the Bering Sea Pollock Fishery

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  Citation × Citation Citation Abstract Copy Title: Market-Based Size Selection in the Bering Sea Pollock Fishery Author: Haynie, Alan, Ianelli, James Abstract only. Title: Market-Based Size Selection in the Bering Sea Pollock Fishery Author: Haynie, Alan, Ianelli, James Abstract only. Close

• 3. [Article] Optimal Management of Conflicting Species: Grey Seal (Halichoerus Grypus) and Baltic Salmon (Salmo Salar L.)

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Optimal Management of Conflicting Species: Grey Seal (Halichoerus Grypus) and Baltic Salmon (Salmo Salar L.) Author: Kulmala, Soile, Lindroos, Marko, Holma, Maija Abstract only. Title: Optimal Management of Conflicting Species: Grey Seal (Halichoerus Grypus) and Baltic Salmon (Salmo Salar L.) Author: Kulmala, Soile, Lindroos, Marko, Holma, Maija Abstract only. Close

• 4. [Article] Towards Development of Biological-Economic Evaluation tool in Fishery Policy: Cost-Effectiveness Analysis of Protecting Species in a Multi Species Fishery

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  Citation × Citation Citation Abstract Copy Title: Towards Development of Biological-Economic Evaluation tool in Fishery Policy: Cost-Effectiveness Analysis of Protecting Species in a Multi Species Fishery Author: Grønbæk Kronbak, Lone, Vestergaard, Niels Abstract only. Title: Towards Development of Biological-Economic Evaluation tool in Fishery Policy: Cost-Effectiveness Analysis of Protecting Species in a Multi Species Fishery Author: Grønbæk Kronbak, Lone, Vestergaard, Niels Abstract only. Close