Relationship between effective and demographic population size in continuously distributed populations

Evolutionary Applications
Jennifer C PiersonDavid B Lindenmayer

Abstract

Genetic monitoring of wild populations can offer insights into demographic and genetic information simultaneously. However, widespread application of genetic monitoring is hindered by large uncertainty in the estimation and interpretation of target metrics such as contemporary effective population size, N e . We used four long-term genetic and demographic studies (≥9 years) to evaluate the temporal stability of the relationship between N e and demographic population size (N c ). These case studies focused on mammals that are continuously distributed, yet dispersal-limited within the spatial scale of the study. We estimated local, contemporary N e with single-sample methods (LDNE, Heterozygosity Excess, and Molecular Ancestry) and demographic abundance with either mark-recapture estimates or catch-per-unit effort indices. Estimates of N e varied widely within each case study suggesting interpretation of estimates is challenging. We found inconsistent correlations and trends both among estimates of N e and between N e and N c suggesting the value of N e as an indicator of N c is limited in some cases. In the two case studies with consistent trends between N e and N c , FIS was more stable over time and lower, suggesti...Continue Reading

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Citations

Jul 22, 2018·Evolutionary Applications·Margaret E HunterLouis Bernatchez
Sep 4, 2020·Molecular Ecology Resources·Gordon LuikartRobin S Waples
Dec 12, 2018·Acta Tropica·Lincoln Suesdek

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Methods Mentioned

BETA
biopsy
genotyping

Software Mentioned

NeEstimator
FSTAT
Genepop
GeneMapper
MARK
GenAlEx

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