title: Structured population dynamics: continuous size and discontinuous stage structures.
abstract: A nonlinear stochastic model for the dynamics of a population with either a continuous size structure or a discontinuous stage structure is formulated in the Eulerian formalism. It takes into account dispersion effects due to stochastic variability of the development process of the individuals. The discrete equations of the numerical approximation are derived, and an analysis of the existence and stability of the equilibrium states is performed. An application to a copepod population is illustrated; numerical results of Eulerian and Lagrangian models are compared.
authors.affiliation: CNR-IMATI, Via Bassini 15, 20133 Milan, Italy. giuseppe.buffoni@santateresa.enea.it
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Buffoni
authors.forename: Sara
authors.initials: S
authors.lastname: Pasquali
mesh_terms: D000818:Animals; D033342:Copepoda; D008433:Mathematics; D008954:Models, Biological; D017711:Nonlinear Dynamics; D011156:Population Density; D011157:Population Dynamics; D012621:Seasons; D013269:Stochastic Processes