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Modeling Heterogeneous Fishing Fleet in an Ecosystem Based Management Context

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  • Multispecies fisheries pose a considerable management difficulty with respect to quota allocation between species. Externalities of direct control over the harvest may include, among others, creation of unbalanced predator‐prey relationships in the environment. That, in turn, may affect the individual economic incentives of fishing vessels. Combining economic and ecological factors in one model has multiple advantages, whereas there have been little attempts to coordinate setting the total allowable catches in multispecies fisheries, particularly in the context of individual decision‐making process. The objective of this article is to develop a methodological framework for multispecies modeling with integrated ecological and economic realism suitable to evaluate the long term implications of the imposed regulations that can be used for better policy guidance. An empirical application is provided for the central Baltic Sea with its interacting fish community dominated by three species: cod, herring and sprat. The developed model includes three separate, dynamically updating, age‐structured submodels for each species, which are linked through predation. The harvest component is associated with the fishing vessels that optimize individual behavior subject to regulations, owned capital and individual technical efficiency derived with the use of a multiproduct distance function. The findings present a clear picture of asymmetries between vessels with respect to harvest process and reveal the rational harvest strategy that is accommodated in the multispecies simulation model.
  • KEYWORDS: Fisheries economics, Ecosystem Based Management
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  • Hutniczak, Barbara. 2015. Modeling Heterogeneous Fishing Fleet in an Ecosystem Based Management Context. In: Proceedings of the Eighth Biennial Forum of the North American Association of Fisheries Economists, May 20-22, 2015, Ketchikan, Alaska: Economic Sustainability, Fishing Communities and Working Waterfronts. Compiled by Ann L. Shriver and Melissa Errend. North American Association of Fisheries Economists, Corvallis, Oregon, USA, 2015.
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  • Alaska Sea Grant, North Pacific Fishery Management Council, North Pacific Research Board, Northern Economics, Pollock Conservation Cooperative Research Center, Rasmuson Foundation, University of Alaska Fairbanks, School of Fisheries and Ocean Sciences, University of Alaska Southeast, Ketchikan
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