Stability and Selective Harvesting of a Phytoplankton-Zooplankton System
Author(s) -
Yong Wang,
Hongbin Wang
Publication year - 2014
Publication title -
journal of applied mathematics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.307
H-Index - 43
eISSN - 1687-0042
pISSN - 1110-757X
DOI - 10.1155/2014/684790
Subject(s) - zooplankton , pontryagin's minimum principle , phytoplankton , stability (learning theory) , hopf bifurcation , biomass (ecology) , environmental science , optimal control , control theory (sociology) , mathematics , bifurcation , ecology , computer science , control (management) , mathematical optimization , biology , physics , nonlinear system , quantum mechanics , machine learning , artificial intelligence , nutrient
Considering that some zooplankton can be harvested for food in some bodies of water, a phytoplankton-zooplankton model with continuous harvesting of zooplankton only is proposed and investigated. By using environmental carrying capacity as a parameter, possible dynamic behaviors, such as stability, global stability, Hopf bifurcation, and transcritical bifurcations, are analyzed. The optimal harvesting policy is disposed by imposing a tax per unit biomass of zooplankton. The problem of determining the optimal harvest policy is solved by using Pontryagin's maximum principle subject to the state equations and the control constraints, and the impact of tax is also discussed. Finally, some numerical simulations are performed to justify analytical findings
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