From Size to Age and Type Structure Dependent Branching: A First Step to Sexual Reproduction in General Population Processes
Paper i proceeding, 2016

Classical branching processes, even the most general, share the property that individuals are supposed to multiply independently of one another, at least given some environment that in its turn is supposed to be unaffected by the population. Only more recently have birth-and-death and branching processes been considered which allow individual reproduction to be influenced by population size. The first results, due to Klebaner, deal with Galton-Watson processes. Work on general, age-structured processes and habitats with a threshold, a so called carrying capacity, came only decades later, inspired by deterministic population dynamics. Multi-type such processes have only been analysed recently. It turns out that a two-type population (males, females) where only the latter can give birth, their fecundity however influenced by the number of males present, provides an approach to sexual reproduction without mating assumptions, like random mating, which are artificial in genereral branching processes.

carrying capacity

sexual reproduction

branching processes

population size dependence

multitype populations


Peter Jagers

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Matematisk statistik

Fima C. Klebaner

Monash University

Lecture Notes in Statistics

0930-0325 (ISSN) 2197-7186 (eISSN)

Vol. 219 137-148
978-331931639-0 (ISBN)

Workshop on Branching Processes and their Applications, WBPA 2015
Badajoz, Spain,




Sannolikhetsteori och statistik


Grundläggande vetenskaper


Livsvetenskaper och teknik (2010-2018)



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