Bioeconomic Simulation Modeling of Fisheries : Three Essays Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/m039k741s

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  • Researchers rely on bioeconomic models to guide research and generate fishery management advice for commercial fisheries. Due partly to a paradigm shift towards ecosystem based fishery management, increasing complexity in the characteristics of the problems has meant that bioeconomic simulation models are becoming more prevalent in the fisheries literature. However in many of these models the economic behavior of fishermen is either omitted, or incorporated using a model that is not based on an economic theory of human behavior. This dissertation comprises three essays that make contributions to advancing the art and science of bioeconomic simulation modeling. The first essay illustrates how a model of fisherman behavior can be incorporated into a bioeconomic harvest-control-rule assessment model of a complex multi-species, multi-fleet fishery. Insights for rebuilding stocks based on different assessment techniques and fleet strategic behavior are discussed. The second essay introduces a novel method for distributing fishing effort across space and time in bioeconomic simulation models based on game theory. A comparison between this method and more traditional methods for modeling fleet fishing behavior are analyzed and the implications and the relative strengths of the game theoretic approach discussed. The third essay describes a bioeconomic simulation model of the Oregon Dungeness crab fishery. A novel application of duration analysis to describe the in-season exit behavior of fishermen is combined with a zero-inflated Poisson model to determine how fishing effort is allocated by different fleets under alternative fishery conditions. A stock dynamics model is then incorporated into a Monte Carlo simulation to assess how changes in season closure dates affect the amount of discard mortality in the fishery, and how these changes affect operating profits in the fishery.
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