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 10-20million individuals per year by fisher...
Published in: | Evolutionary Applications |
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Online Access: | http://prodinra.inra.fr/ft/D08FDC47-EEC7-405B-B004-4A2553FE3274 http://prodinra.inra.fr/record/483850 https://doi.org/10.1111/eva.12591 |
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ftinraparis:oai:prodinra.inra.fr:483850 2023-05-15T17:35:18+02:00 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 2018 application/pdf http://prodinra.inra.fr/ft/D08FDC47-EEC7-405B-B004-4A2553FE3274 http://prodinra.inra.fr/record/483850 https://doi.org/10.1111/eva.12591 eng eng https://creativecommons.org/licenses/by/3.0/ CC-BY Evolutionary Applications 5 (11), 614-630. (2018) Autre (Sciences du Vivant) blue shark;conservation;fisherie;genetic panmixia;prionace glauca;stock ARTICLE 2018 ftinraparis https://doi.org/10.1111/eva.12591 2019-12-10T23:25:43Z 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 10-20million 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 management of stocks, which may be provided by large-scale sampling not only of individuals worldwide, but also of loci genomewide. Article in Journal/Newspaper North Atlantic Institut National de la Recherche Agronomique: ProdINRA Pacific Evolutionary Applications 11 5 614 630 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
Autre (Sciences du Vivant) blue shark;conservation;fisherie;genetic panmixia;prionace glauca;stock |
spellingShingle |
Autre (Sciences du Vivant) blue shark;conservation;fisherie;genetic panmixia;prionace glauca;stock Bailleul, Diane Mackenzie, Alicia Sacchi, Olivier Poisson, François Bierne, Nicolas Arnaud-Haond, Sophie 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 |
Autre (Sciences du Vivant) blue shark;conservation;fisherie;genetic panmixia;prionace glauca;stock |
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 10-20million 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 management of stocks, which may be provided by large-scale sampling not only of individuals worldwide, but also of loci genomewide. |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
2018 |
url |
http://prodinra.inra.fr/ft/D08FDC47-EEC7-405B-B004-4A2553FE3274 http://prodinra.inra.fr/record/483850 https://doi.org/10.1111/eva.12591 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Evolutionary Applications 5 (11), 614-630. (2018) |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/eva.12591 |
container_title |
Evolutionary Applications |
container_volume |
11 |
container_issue |
5 |
container_start_page |
614 |
op_container_end_page |
630 |
_version_ |
1766134430518214656 |