Gause's exclusion principle revisited: artificial modified species and competition

Details Gause's exclusion principle revisited: artificial modified species and competition Gause's exclusion principle revisited: artificial modified species and competition

2000-07-26

arxiv.org/abs/nlin/0007038v1

Nonlinear Sciences

Adaptation and Self-Organizing Systems

11 pages. Published in Jour.Phys.A Math.Gen. 33, 4877 (2000)

Scientific paper

10.1088/0305-4470/33/27/305

Gause's principle of competition between two species is studied when one of them is sterile. We study the condition for total extinction in the niche, namely, when the sterile population exterminates the native one by an optimal use of resources. A mathematical Lotka-Volterra non linear model of interaction between a native and sterile species is proposed. The condition for total extinction is related to the initial number $M_{o}$ of sterile individuals released in the niche. In fact, the existence of a critical sterile-population value $M_{c}$ is conjectured from numerical analysis and an analytical estimation is found. When spatial diffusion (migration) is considered a critical size territory is found and, for small territory, total extinction exist in any case. This work is motived by the extermination agriculture problem of fruit flies in our region.

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