Journal of Applied Probability

Population-size-dependent, age-structured branching processes linger around

Peter Jagers and Fima C. Klebaner


Dependence of individual reproduction upon the size of the whole population is studied in a general branching process context. The particular feature under scrutiny is that of reproduction changing from supercritical in small populations to subcritical in large populations. The transition occurs when the population size passes a critical threshold, known in ecology as the carrying capacity. We show that populations either die out directly, never coming close to the carrying capacity, or grow quickly towards the carrying capacity, subsequently lingering around it for a time that is expected to be exponentially long in terms of a carrying capacity tending to infinity.

Article information

J. Appl. Probab., Volume 48A (2011), 249-260.

First available in Project Euclid: 18 October 2011

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Digital Object Identifier

Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 60J80: Branching processes (Galton-Watson, birth-and-death, etc.)
Secondary: 92D25: Population dynamics (general)

Age structure branching process carrying capacity


Jagers, Peter; Klebaner, Fima C. Population-size-dependent, age-structured branching processes linger around. J. Appl. Probab. 48A (2011), 249--260. doi:10.1239/jap/1318940469.

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