殺虫剤使用が害虫-天敵系にもたらす反動のモデル化とシミュレーション

概要

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A model analysis is presented that allows prediction of the dynamical behavior of a vermin-predator system which is dusted periodically with insecticide. Two species of organisms having the same birth-death cycle are supposed to live in the system; one is vermin and the other the predator feeding only on the former. The increasing rate of population for each organism comprizes three terms which simulate the natural motality, the predatory death or life, and the insecticide-induced death. The decay of agrichemical concentration in the body is modeled by a mathematical function and, especially for the predator, the accumulation of the insecticide due to predation of polluted vermin is also taken into consideration. The analysis based on this model can successfully elucidate the ecological rebound which is caused by use of agrichemicals, that is, the insecticide to kill the vermin may on the contrary result in irruption of it.
岐阜大学の論文
2001-09-25