Static and dynamic expression of life history traits in the Northern Fulmar (Fulmarus glacialis )

Oikos
Steven Hecht OrzackPaul Thompson

Abstract

Understanding the static and dynamic expression of life history traits is a prerequisite for the development of a causal theory of the evolution of aging and of life histories. We analyzed the statics and dynamics of reproduction and survival in a wild population of the Northern Fulmar, Fulmarus glacialis (Procellaridae). Survival rate is most influenced by year as compared to age and cohort. When temporal variation is ignored, survival rate increases slowly with age and then declines more rapidly at late ages. Survival rate contingent upon reproductive "stratum" (producing an egg, hatching an egg, fledging a hatchling) also exhibits this pattern. Survival and reproduction have a positive static association in that survival rate increases as the apparent energy allocated to reproduction increases (as indexed by stratum). There is a broad distribution of realized lifetime reproductive success, which could be due to "fixed" heterogeneity, with some individuals always having low survival and reproduction and others always having high survival and reproduction, or be due to "dynamic" heterogeneity, with all individuals having the same expected reproductive and survival rates. Analysis of stochastic stratum dynamics indicates that i...Continue Reading

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Citations

Oct 30, 2015·Proceedings. Biological Sciences·Alexandre RobertJoël Bried
Nov 29, 2015·Molecular Ecology·William J EtgesAllen G Gibbs
Dec 7, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Steven Hecht Orzack
Aug 7, 2013·Ecology and Evolution·Thierry ChambertRobert A Garrott
Jul 22, 2021·Ecology Letters·Amy B ForsytheWilliam A Nelson

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