Generation time and the maximum growth rate for populations with age-specific fecundities and unknown juvenile survival

Peter W. Dillingham

Ecological Modelling, 2010, vol. 221, issue 6, 895-899

Abstract: In age-classified population models where all parameters are known, the generation time and growth rate are calculated in a straightforward manner. For many populations, some parameters, such as juvenile survival, are difficult to estimate accurately. In a simplified population model where fecundity and survival are constant from the onset of breeding, it is known that generation time may be calculated given only adult survival, age at first reproduction, and the population growth rate. However, the assumption of constant fecundity from the onset of breeding does not hold for many populations. An extended population model allows calculation of generation time with the additional knowledge of the ratio of age-specific fecundities compared to a maximum fecundity rate. When these relative fecundities are unknown, an ad hoc adjustment to the simplified model performs well.

Keywords: Age-structured models; Population dynamics; Matrix population models; Population growth rate; Generation time; Demography; Leslie matrix (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:221:y:2010:i:6:p:895-899

DOI: 10.1016/j.ecolmodel.2009.12.008

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