Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches
Abstract The effective population size ( N e ) could be the ideal parameter for monitoring populations of conservation concern as it conveniently summarizes both the evolutionary potential of the population and its sensitivity to genetic stochasticity. However, tracing its change through time is dif...
Published in: | Molecular Ecology |
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Online Access: | http://dx.doi.org/10.1111/j.1365-294x.2011.05423.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2011.05423.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2011.05423.x |
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crwiley:10.1111/j.1365-294x.2011.05423.x 2024-06-02T08:15:37+00:00 Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches SKRBINŠEK, TOMAŽ JELENČIČ, MAJA WAITS, LISETTE KOS, IVAN JERINA, KLEMEN TRONTELJ, PETER 2012 http://dx.doi.org/10.1111/j.1365-294x.2011.05423.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2011.05423.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2011.05423.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 21, issue 4, page 862-875 ISSN 0962-1083 1365-294X journal-article 2012 crwiley https://doi.org/10.1111/j.1365-294x.2011.05423.x 2024-05-03T11:25:49Z Abstract The effective population size ( N e ) could be the ideal parameter for monitoring populations of conservation concern as it conveniently summarizes both the evolutionary potential of the population and its sensitivity to genetic stochasticity. However, tracing its change through time is difficult in natural populations. We applied four new methods for estimating N e from a single sample of genotypes to trace temporal change in N e for bears in the Northern Dinaric Mountains. We genotyped 510 bears using 20 microsatellite loci and determined their age. The samples were organized into cohorts with regard to the year when the animals were born and yearly samples with age categories for every year when they were alive. We used the Estimator by Parentage Assignment (EPA) to directly estimate both N e and generation interval for each yearly sample. For cohorts, we estimated the effective number of breeders ( N b ) using linkage disequilibrium, sibship assignment and approximate Bayesian computation methods and extrapolated these estimates to N e using the generation interval. The N e estimate by EPA is 276 (183–350 95% CI), meeting the inbreeding‐avoidance criterion of N e > 50 but short of the long‐term minimum viable population goal of N e > 500. The results obtained by the other methods are highly consistent with this result, and all indicate a rapid increase in N e probably in the late 1990s and early 2000s. The new single‐sample approaches to the estimation of N e provide efficient means for including N e in monitoring frameworks and will be of great importance for future management and conservation. Article in Journal/Newspaper Ursus arctos Wiley Online Library Molecular Ecology 21 4 862 875 |
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Wiley Online Library |
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English |
description |
Abstract The effective population size ( N e ) could be the ideal parameter for monitoring populations of conservation concern as it conveniently summarizes both the evolutionary potential of the population and its sensitivity to genetic stochasticity. However, tracing its change through time is difficult in natural populations. We applied four new methods for estimating N e from a single sample of genotypes to trace temporal change in N e for bears in the Northern Dinaric Mountains. We genotyped 510 bears using 20 microsatellite loci and determined their age. The samples were organized into cohorts with regard to the year when the animals were born and yearly samples with age categories for every year when they were alive. We used the Estimator by Parentage Assignment (EPA) to directly estimate both N e and generation interval for each yearly sample. For cohorts, we estimated the effective number of breeders ( N b ) using linkage disequilibrium, sibship assignment and approximate Bayesian computation methods and extrapolated these estimates to N e using the generation interval. The N e estimate by EPA is 276 (183–350 95% CI), meeting the inbreeding‐avoidance criterion of N e > 50 but short of the long‐term minimum viable population goal of N e > 500. The results obtained by the other methods are highly consistent with this result, and all indicate a rapid increase in N e probably in the late 1990s and early 2000s. The new single‐sample approaches to the estimation of N e provide efficient means for including N e in monitoring frameworks and will be of great importance for future management and conservation. |
format |
Article in Journal/Newspaper |
author |
SKRBINŠEK, TOMAŽ JELENČIČ, MAJA WAITS, LISETTE KOS, IVAN JERINA, KLEMEN TRONTELJ, PETER |
spellingShingle |
SKRBINŠEK, TOMAŽ JELENČIČ, MAJA WAITS, LISETTE KOS, IVAN JERINA, KLEMEN TRONTELJ, PETER Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
author_facet |
SKRBINŠEK, TOMAŽ JELENČIČ, MAJA WAITS, LISETTE KOS, IVAN JERINA, KLEMEN TRONTELJ, PETER |
author_sort |
SKRBINŠEK, TOMAŽ |
title |
Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
title_short |
Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
title_full |
Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
title_fullStr |
Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
title_full_unstemmed |
Monitoring the effective population size of a brown bear ( Ursus arctos) population using new single‐sample approaches |
title_sort |
monitoring the effective population size of a brown bear ( ursus arctos) population using new single‐sample approaches |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2011.05423.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2011.05423.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2011.05423.x |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Molecular Ecology volume 21, issue 4, page 862-875 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/j.1365-294x.2011.05423.x |
container_title |
Molecular Ecology |
container_volume |
21 |
container_issue |
4 |
container_start_page |
862 |
op_container_end_page |
875 |
_version_ |
1800739864395644928 |