Before implementing resource management measures, it is essential to establish the goals of fisheries by assessing current biomass status and level fishing effort. This study aims compare surplus production models, i.e., process-error state-space based on how they fit observed data. The effects Sandfish Stock Rebuilding Plan are analyzed using a bioeconomic model. analytical results show that l...

With the overexploitation of many conventional fish stocks, and growing interest in harvesting new kinds of food from the sea, there is an increasing need for managers of fisheries to take account of interactions among species. In this work we define a bioeconomic equilibrium model for ’n’ fishermen who catch three species; these species compete with each other for space or food. The natural gr...

The Bohai Sea is one of the most important fisheries resources in China. Fisheries and mariculture are the main industries offering important food security by exploitation of migrating and stationary resources based on the same ecosystem in Bohai Sea. Understanding the potential bioeconomic interactions between fisheries and mariculture will provide the basis for fisheries and mariculture manag...

Understanding ecological complexity has stymied scientists for decades. Recent elucidation of the famously coined "devious strategies stability in enduring natural systems" opened up a new field computational analyses complex networks where nonlinear dynamics many interacting species can be more realistically modeled and understood. Here, we describe first extension this to include coupled huma...

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We investigate the dynamics of a differential-algebraic bioeconomic model with two time delays. Regarding time delay as a bifurcation parameter, we show that a sequence of Hopf bifurcations occur at the positive equilibrium as the delay increases. Using the theories of normal form and center manifold, we also give the explicit algorithm for determining the direction of the Hopf bifurcations and...