This article presents an overview of single-species age-class models. The first section discusses the construction of life tables, which are then used to construct age-class models. A life table is an age-specific summary of mortality rates operating on a cohort of individuals. The second section focuses on compartment models, which can consist of systems of differential equations, integral equations, or matrix models with one equation or matrix for each compartment. The third section discusses matrix models including age- and stage-based matrix models. The fourth and final section focuses on stochastic models that incorporate the probabilistic nature of biological systems by treating one or more parameters as random variables.
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