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Full-Text Articles in Physical Sciences and Mathematics
A System Dynamics Model Of The Pacific Coast Rockfish Fishery, Wayne Wakeland, Olgay Cangur, Guillermo Rueda, Astrid Scholz
A System Dynamics Model Of The Pacific Coast Rockfish Fishery, Wayne Wakeland, Olgay Cangur, Guillermo Rueda, Astrid Scholz
Systems Science Faculty Publications and Presentations
This paper presents a model of the dynamic behavior of the yellowtail rockfish of the Pacific Coast of the United States. The purpose of the model is to generate endogenously the historical data for fish population, fishing vessels, regulatory parameters, and fish harvest. The model was subjected to a variety of tests to determine its sensitivity to changes in key parameters and initial values, including extreme conditions. Model results indicate that acceptable biological catch and fleet capacity must be adjusted quickly in response to changing conditions, in order to improve fishery sustainability. Additional analysis reinforces the policy of setting the …
Estimating Watershed Biodiversity: An Empirical Study Of The Chesapeake Bay In Maryland, Usa, Junko Morimoto, Helena Voinov, Matthew A. Wilson, Robert Costanza
Estimating Watershed Biodiversity: An Empirical Study Of The Chesapeake Bay In Maryland, Usa, Junko Morimoto, Helena Voinov, Matthew A. Wilson, Robert Costanza
Institute for Sustainable Solutions Publications and Presentations
There has been increasing demand for rigorous methods for evaluating biodiversity, one of the ecosystem services that sustains and fulfills human life. After carefully examining the literature, we found three key points that should be taken into account when we evaluate biodiversity. The first point is that any "indicator species" tends to be a leaky target of biodiversity. The second point is that "buffering" that is useful for representing the ecological concept of boundaries should have scientific meanings. The third point is that a "watershed" that integrates most natural processes is advantageous as the spatial range for evaluation. Based on …