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  1.  54
    Complex Ecological Models with Simple Dynamics: From Individuals to Populations.Pierre M. Auger & Robert Roussarie - 1994 - Acta Biotheoretica 42 (2-3):111-136.
    The aim of this work is to study complex ecological models exhibiting simple dynamics. We consider large scale systems which can be decomposed into weakly coupled subsystems. Perturbation Theory is used in order to get a reduced set of differential equations governing slow time varying global variables. As examples, we study the influence of the individual behaviour of animals in competition and predator-prey models. The animals are assumed to do many activities all day long such as searching for food of (...)
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  2.  17
    Competition and Predation Models Applied to the Case of the Sibling Birds Species Ofhippolais in Burgundy.Bruno Faivre & Pierre M. Auger - 1993 - Acta Biotheoretica 41 (1-2):23-33.
    We study the case of two sibling species ofHippolais(Aves). Very little differences can be observed in the morphology of both species. The breeding area of these species are complementary. Roughly, one species breeds North and East of Europe (Hippolais icterina) while the other breeds South and West of Europe (Hippolais polyglotta). There exitst a narrow zone of sympatry passing through Burgundy. Since several years, it has been observed that this area of sympatry was moving in the North-East direction at a (...)
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  3.  27
    Effect of Myocardial Infarction and Ischemia on Induction of Cardiac Reentries and Ventricular Fibrillation.Alain L. Bardou, Pierre M. Auger, Soumeya Achour, Philippe Dumee, Pierre J. Birkui & Marie-Claude Govaere - 1995 - Acta Biotheoretica 43 (4):363-372.
    The present work is aimed at investigating the effects of myocardial infarction and ischemia on induction of ventricular fibrillation. Electrophysiologic effects of global and local ischemia (variation of the dispersion of refractory periods as well as conduction velocity) on initiation of reentry mechanisms was studied by means of computer simulations based on a cellular automata model of propagation of activation wave through a ventricular surface element. A local area of ischemia where effects of the dispersion of refractory periods are investigated (...)
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  4.  22
    Effects of Individual Activity Sequences on Prey-Predator Models.Pierre M. Auger & Bruno Faivre - 1993 - Acta Biotheoretica 41 (1-2):13-22.
    We study the influence of the individual behaviour of animals on predator-prey models. Populations of preys and predators are divided into sub-populations corresponding to different activity classes. The animals are assumed to do many activities all day long such as searching for food of different types. The preys are more vulnerable when doing some activities during which they are very exposed to predators attacks rather than for others during which they are hidden. We study activity sequences of the animals and (...)
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  5.  20
    Theoretical Study of Cardiac Transient Conduction Blocks on Reentries Induction. Applications to Antiarrhythmic Drugs.Alain L. Bardou, Pierre M. Auger, Jean-Luc Chasse & Renaud Seigneuric - 1997 - Acta Biotheoretica 45 (3-4):227-236.
    Limitations of antiarrhythmic drugs on cardiac sudden death prevention appeared since the early 80's. The "Cardiac Arrhythmia Suppression Trial"(CAST) showed more recently that mortality was significantly higher inpatients treated with some particular antiarrhythmic drugs than in non-treated patients. In this field, our group recently demonstrated that a bolus of a Class 1B antiarrhythmic drug was able to trigger a ventricular fibrillation due to transient blocks induction. The aim of the present work was to systematically study, by use of the van (...)
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