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Reproductive Value and the Stochastic Demography of Age-Structured Populations

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dc.creatorEngen, Steinar
dc.creatorLande, Russell
dc.creatorSæther, Bernt‐Erik
dc.creatorDobson, Stephen
dc.description.abstractThe dynamics of an age-structured population in a fluctuating environment is determined by the stochastic individual contributions from annual survival and fecundity to the total reproductive value of the population the next year. All parameters required to describe the population dynamics are simple properties of the distribution of these individual demographic contributions, which we call individual reproductive value. The asymptotic population growth rate in the average environment and the demographic and environmental variances are respectively the mean individual reproductive value over individuals through time and the variance within and between years. Our approach leads to an intuitive understanding of demographic and environmental variances in age-structured populations and their decomposition into additive age-specific components due to survival and reproduction. We show how to apply this approach to estimate the demographic and environmental variances and their components. The estimates are based on yearly random samples of individual vital rates and require no information about the total population size.en_US
dc.publisherUniversity of Chicago Pressen_US
dc.relation.ispartofAMERICAN NATURALISTen_US
dc.rights©The Authors 2009. ©University of Chicago Press 2009. This is this the version of record published by the University of Chicago Press. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Engen, Steinar, Russell Lande, Bernt-Erik Sæther, and F. Stephen Dobson. "Reproductive value and the stochastic demography of age-structured populations." The American Naturalist 174, no. 6 (2009): 795-804.en_US
dc.subjectindividual reproductive valueen_US
dc.subjectage structureen_US
dc.subjectenvironmental stochasticityen_US
dc.subjectreproductive valueen_US
dc.subjectage-dependent stochastic demographyen_US
dc.titleReproductive Value and the Stochastic Demography of Age-Structured Populationsen_US
dc.type.genreJournal Article, Academic Journalen_US

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