Mid-term bio-economic optimization of multi-species fisheries. (English) Zbl 1481.91136
Summary: In this paper, we analyze the dynamics of a multi-species fisheries system in the presence of harvesting. We solve the problem of finding the optimal harvesting strategy for a mid-term horizon with a fixed final stock of each species, while maximizing the expected present value of total revenues. The problem is formulated as an optimal control problem. For its solution, we combine techniques derived from Pontryagin’s Maximum Principle, cyclic coordinate descent and the shooting method. The algorithm we develop can solve problems both with inter-species competition and with predator-prey behaviors. Several numerical examples are presented to illustrate the different possibilities of the method and a study of the dependence of the behavior on some parameters is performed.
MSC:
| 91B76 | Environmental economics (natural resource models, harvesting, pollution, etc.) |
| 49N90 | Applications of optimal control and differential games |
| 92D40 | Ecology |
Keywords:
optimal control; Pontryagin’s maximum principle; shooting method; cyclic coordinate descent; renewable resourcesReferences:
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