Adaptive divergence despite low effective population size in a peripherally isolated population of the pygmy rabbit, Brachylagus idahoensis

2021 ◽  
Author(s):  
Nathan W. Byer ◽  
Matthew L. Holding ◽  
Miranda M. Crowell ◽  
Todd W. Pierson ◽  
Thomas E. Dilts ◽  
...  
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Adaptive Divergence ◽  
Isolated Population ◽  
Effective Population ◽  
Pygmy Rabbit ◽  
Brachylagus Idahoensis

scholarly journals Effective Population Size Is Positively Correlated with Levels of Adaptive Divergence among Annual Sunflowers

2010 ◽  
Vol 28 (5) ◽  
pp. 1569-1580 ◽  
Author(s):  
J. L. Strasburg ◽  
N. C. Kane ◽  
A. R. Raduski ◽  
A. Bonin ◽  
R. Michelmore ◽  
...  
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Adaptive Divergence ◽  
Effective Population

scholarly journals GENETIC DRIFT AND ESTIMATION OF EFFECTIVE POPULATION SIZE

Genetics ◽  
1981 ◽  
Vol 98 (3) ◽  
pp. 625-640
Author(s):  
Masatoshi Nei ◽  
Fumio Tajima
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Random Mating ◽  
Effective Size ◽  
Isolated Population ◽  
Effective Population ◽  
Dacus Oleae ◽  
Census Size ◽  
Mating Population ◽  
Frequency Changes

ABSTRACT The statistical properties of the standardized variance of gene frequency changes (a quantity equivalent to Wright's inbreeding coefficient) in a random mating population are studied, and new formulae for estimating the effective population size are developed. The accuracy of the formulae depends on the ratio of sample size to effective size, the number of generations involved (t), and the number of loci or alleles used. It is shown that the standardized variance approximately follows the Χ2 distribution unless t is very large, and the confidence interval of the estimate of effective size can be obtained by using this property. Application of the formulae to data from an isolated population of Dacus oleae has shown that the effective size of this population is about one tenth of the minimum census size, though there was a possibility that the procedure of sampling genes was improper.

scholarly journals How many of them? Genetic diversity, survival and effective population size of the capercaillie population from the Gorce Mountains

2019 ◽  
Vol 62 (2) ◽  
pp. 135-144
Author(s):  
Sebastian SZCZEPAŃSKI ◽  
◽  
Anna SANTOREK ◽  
Beata DULISZ ◽  
Zbigniew ŻUREK ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Size ◽  
Effective Population Size ◽  
Allelic Richness ◽  
Isolated Population ◽  
Effective Population ◽  
Field Surveys ◽  
Genetic Profiling ◽  
Factors Affecting ◽  
Non Invasive

Population size and effective population size are important factors affecting probability of extinction of small, isolated population. Hence, from conservation perspective, it is recommended to monitor changes in population size of endangered species. Genetic methods, based on genetic profiling of non-invasive samples of biological material, despite some limitations, were proved to be efficient method in tracking individuals in the field and estimate populations' parameters. We used this strategy to investigate isolated population of the capercaillie (Tetrao urogallus) in the Gorce Mountains. In two study periods (2012–2013 and 2017–2018) almost 400 faeces and feathers were collected. Microsatellite genotyping was performed to identify individuals and estimate genetic diversity. We found that population is stable in terms of size and genetic indices, although allelic richness has significantly increased between 2012–2013 and 2017–2018. In the overall study period (2012–2018) there were 52 individuals identified. However, only 10 birds were found in both study periods. This suggests low survival in the population. Moreover, genetic data indicated low effective population size of the capercaillie in the Gorce Mts. Thus, we suggest that monitoring, either genetic and based on field-surveys, should be implemented in the management and protection of this population.

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