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ABSTRACT
Short—and long-term field studies in the vicinity of Poitiers show that populations of terrestrial isopods can be characterized by large variations, from demographic explosion to extinction. Mechanisms and determinants of these variations are not yet clearly explained. These could be external features (environmental changes) or internal features (disease, parasitism, metapopulational evolution). We have developed a realistic simulation program, named DYNISO, which is able to reproduce the individual life history of terrestrial isopods according to abiotic factors (photoperiod, thermoperiod) and biotic factors (sexual interactions, incidence of parasitism, sex ratio distorters, etc.). In the model, all biological traits—such as growth, reproduction, reactivity to environment, and death—are user-defined. In this study, we present some features concerning the life histories of female isopods and their implications for population dynamics. We show the capability of the model to test genotypes in different geographic locations.