Dynamic feedback optimization of bioresource management in a polluted ecosystem

A single state bioresource management model was derived from the viewpoint of control engineering based on a nonlinear and stochastic dynamic system. The model can be used to solve the problem regarding the analysis and manag ement of biological resources in the presence of uncertainty and the implic ation of uncertainty in decision making. The management of trace Zn bioaccu mulation in aquaculture abalone, Haliotis diversicolor supertexta, is illus trated to show the applicability of established techniques in designing a d ynamic feedback control strategy. General results from the engineering anal ysis are presented in the form of strategies of constant Zn concentration i n molluskan shellfish and of constant control effort and in the form of war ning about the instability of the system. Numerical data were obtained whic h could be used to design a controller minimizing fluctuations about a chos en equilibrium state. Dynamic feedback optimization can serve as a guide to the decision making of sustainable bioresource management in a polluted ec osystem in that the decisions are required to be made in the presence of un certainty. (C) 1999 Elsevier Science Ltd.