Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation?
The blue shark Prionace glauca, among the most common and widely studied pelagic sharks, is a top predator, exhibiting the widest distribution range. However, little is known about its population structure and spatial dynamics. With an estimated removal of 10 to 20 million individuals per year by fi...
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ftdryad:oai:v1.datadryad.org:10255/dryad.166682 2023-05-15T17:35:17+02:00 Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? Bailleul, Diane Mackenzie, Alicia Sacchi, Olivier Poisson, François Bierne, Nicolas Arnaud-Haond, Sophie Mediterranean Sea Atlantic Ocean Pacific Ocean 2017-12-20T16:20:06Z http://hdl.handle.net/10255/dryad.166682 https://doi.org/10.5061/dryad.k302g unknown doi:10.5061/dryad.k302g/1 doi:10.5061/dryad.k302g/2 doi:10.1111/eva.12591 doi:10.5061/dryad.k302g Bailleul D, Mackenzie A, Sacchi O, Poisson F, Bierne N, Arnaud-Haond S (2018) Large-scale genetic panmixia in the blue shark (Prionace glauca ): A single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation?. Evolutionary Applications 11(5): 614-630. http://hdl.handle.net/10255/dryad.166682 Fisheries Stock blue shark genetic panmixia conservation Article 2017 ftdryad https://doi.org/10.5061/dryad.k302g https://doi.org/10.5061/dryad.k302g/1 https://doi.org/10.5061/dryad.k302g/2 https://doi.org/10.1111/eva.12591 2020-01-01T16:02:15Z The blue shark Prionace glauca, among the most common and widely studied pelagic sharks, is a top predator, exhibiting the widest distribution range. However, little is known about its population structure and spatial dynamics. With an estimated removal of 10 to 20 million individuals per year by fisheries, the species is classified as “Near Threatened” by International Union for Conservation of Nature. We lack the knowledge to forecast the long-term consequences of such a huge removal on this top predator itself and on its trophic network. The genetic analysis of more than 200 samples collected at broad scale (from Mediterranean Sea, North Atlantic and Pacific Oceans) using mtDNA and nine microsatellite markers allowed to detect signatures of genetic bottlenecks but a nearly complete genetic homogeneity across the entire studied range. This apparent panmixia could be explained by a genetic lag-time effect illustrated by simulations of demographic changes that were not detectable through standard genetic analysis before a long transitional phase here introduced as the “population grey zone”. The results presented here can thus encompass distinct explanatory scenarios spanning from a single demographic population to several independent populations. This limitation prevents the genetic-based delineation of stocks and thus the ability to anticipate the consequences of severe depletions at all scales. More information is required for the conservation of population(s) and managements of stocks, which may be provided by large scale sampling not only of individuals worldwide, but also of loci genome-wide. Article in Journal/Newspaper North Atlantic Dryad Digital Repository (Duke University) Pacific |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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ftdryad |
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unknown |
topic |
Fisheries Stock blue shark genetic panmixia conservation |
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Fisheries Stock blue shark genetic panmixia conservation Bailleul, Diane Mackenzie, Alicia Sacchi, Olivier Poisson, François Bierne, Nicolas Arnaud-Haond, Sophie Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
topic_facet |
Fisheries Stock blue shark genetic panmixia conservation |
description |
The blue shark Prionace glauca, among the most common and widely studied pelagic sharks, is a top predator, exhibiting the widest distribution range. However, little is known about its population structure and spatial dynamics. With an estimated removal of 10 to 20 million individuals per year by fisheries, the species is classified as “Near Threatened” by International Union for Conservation of Nature. We lack the knowledge to forecast the long-term consequences of such a huge removal on this top predator itself and on its trophic network. The genetic analysis of more than 200 samples collected at broad scale (from Mediterranean Sea, North Atlantic and Pacific Oceans) using mtDNA and nine microsatellite markers allowed to detect signatures of genetic bottlenecks but a nearly complete genetic homogeneity across the entire studied range. This apparent panmixia could be explained by a genetic lag-time effect illustrated by simulations of demographic changes that were not detectable through standard genetic analysis before a long transitional phase here introduced as the “population grey zone”. The results presented here can thus encompass distinct explanatory scenarios spanning from a single demographic population to several independent populations. This limitation prevents the genetic-based delineation of stocks and thus the ability to anticipate the consequences of severe depletions at all scales. More information is required for the conservation of population(s) and managements of stocks, which may be provided by large scale sampling not only of individuals worldwide, but also of loci genome-wide. |
format |
Article in Journal/Newspaper |
author |
Bailleul, Diane Mackenzie, Alicia Sacchi, Olivier Poisson, François Bierne, Nicolas Arnaud-Haond, Sophie |
author_facet |
Bailleul, Diane Mackenzie, Alicia Sacchi, Olivier Poisson, François Bierne, Nicolas Arnaud-Haond, Sophie |
author_sort |
Bailleul, Diane |
title |
Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
title_short |
Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
title_full |
Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
title_fullStr |
Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
title_full_unstemmed |
Data from: Large-scale genetic panmixia in the blue shark (Prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
title_sort |
data from: large-scale genetic panmixia in the blue shark (prionace glauca): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation? |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.166682 https://doi.org/10.5061/dryad.k302g |
op_coverage |
Mediterranean Sea Atlantic Ocean Pacific Ocean |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
doi:10.5061/dryad.k302g/1 doi:10.5061/dryad.k302g/2 doi:10.1111/eva.12591 doi:10.5061/dryad.k302g Bailleul D, Mackenzie A, Sacchi O, Poisson F, Bierne N, Arnaud-Haond S (2018) Large-scale genetic panmixia in the blue shark (Prionace glauca ): A single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation?. Evolutionary Applications 11(5): 614-630. http://hdl.handle.net/10255/dryad.166682 |
op_doi |
https://doi.org/10.5061/dryad.k302g https://doi.org/10.5061/dryad.k302g/1 https://doi.org/10.5061/dryad.k302g/2 https://doi.org/10.1111/eva.12591 |
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