Journal
MATHEMATICAL MODELLING OF NATURAL PHENOMENA
Volume 3, Issue 2, Pages 27-66Publisher
EDP SCIENCES S A
DOI: 10.1051/mmnp:2008054
Keywords
evolution; regulatory networks; modeling; motifs; adaptation mechanism
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Funding
- Rhone-Alpes Complex Systems Institute (IXXI)
- Spanish Ministry of Education [TIN2007-67148]
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Studying the evolutive and adaptative mechanism of prokaryotes is a complicated task. As these mechanisms cannot be easily studied in vivo, it is necessary to consider other methods. We have therefore developed the RAevol model, a model designed to study the evolution of bacteria and their adaptation to the environment. Our model simulates the evolution of a population of artificial bacteria in a changing environment, providing us with an insight into the strategies that digital organisms develop to adapt to new conditions. In this paper we describe the principles and architecture of the model, focussing on the mechanisms of the regulatory networks of artificial organisms. Experiments were conducted on populations of artificial bacteria under conditions of stress. We study the ways in which organisms adapt to environmental changes and examine the strategies they adopt. An analysis of these adaptation strategies is presented and a brief overview was proposed concerning the patterns and topological characteristics of the evolved regulatory networks.
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