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Harvesting induced fluctuations: insights from a threshold management policy
Michel Iskin da Silveira Costa1
1Laboratório Nacional de Computação Científica, Av. Getúlio Vargas, 333 Quitandinha Petrópolis-RJ 25651-070, Brazil. michel@lncc.br
Mathematical Biosciences
|June 27, 2006
Abstract:
In this work, it is shown that in a deterministic context, a threshold policy can induce cyclic behavior in an otherwise exploited stable population. These dynamics ensue as a result of the combination of the degree of harvesting pressure and more protective threshold densities. Virtual equilibrium in variable structure systems plays a determinant role in this dynamical outcome.