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Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region
Human activities have resulted in the loss of over 90% of sharks in most ocean basins and one in four species of elasmobranch are now listed at risk of extinction by the IUCN. How this collapse will affect the ability of populations to recover in the face of continued exploitation and global climate...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6825237/ https://www.ncbi.nlm.nih.gov/pubmed/31676818 http://dx.doi.org/10.1038/s41598-019-52221-6 |
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author | Boissin, E. Thorrold, S. R. Braun, C. D. Zhou, Y. Clua, E. E. Planes, S. |
author_facet | Boissin, E. Thorrold, S. R. Braun, C. D. Zhou, Y. Clua, E. E. Planes, S. |
author_sort | Boissin, E. |
collection | PubMed |
description | Human activities have resulted in the loss of over 90% of sharks in most ocean basins and one in four species of elasmobranch are now listed at risk of extinction by the IUCN. How this collapse will affect the ability of populations to recover in the face of continued exploitation and global climate change remains unknown. Indeed, important ecological and biological information are lacking for most shark species, particularly estimates of genetic diversity and population structure over a range of spatial scales. Using 15 microsatellite markers, we investigated genetic diversity and population structure in gray reef sharks over their Indo-Pacific range (407 specimens from 9 localities). Clear genetic differentiation was observed between the Indian and the Pacific Ocean specimens (F(ST) = 0.145***). Further differentiation within the Pacific included a West and East cleavage as well as North-Central and South-Central Pacific clusters. No genetic differentiation was detected within archipelagos. These results highlight the legacy of past climate changes and the effects of large ocean expanses and circulation patterns on contrasting levels of connectivity at global, regional and local scales. Our results indicate a need for regional conservation units for gray reef sharks and pinpoint the isolation and vulnerability of their French Polynesian population. |
format | Online Article Text |
id | pubmed-6825237 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-68252372019-11-12 Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region Boissin, E. Thorrold, S. R. Braun, C. D. Zhou, Y. Clua, E. E. Planes, S. Sci Rep Article Human activities have resulted in the loss of over 90% of sharks in most ocean basins and one in four species of elasmobranch are now listed at risk of extinction by the IUCN. How this collapse will affect the ability of populations to recover in the face of continued exploitation and global climate change remains unknown. Indeed, important ecological and biological information are lacking for most shark species, particularly estimates of genetic diversity and population structure over a range of spatial scales. Using 15 microsatellite markers, we investigated genetic diversity and population structure in gray reef sharks over their Indo-Pacific range (407 specimens from 9 localities). Clear genetic differentiation was observed between the Indian and the Pacific Ocean specimens (F(ST) = 0.145***). Further differentiation within the Pacific included a West and East cleavage as well as North-Central and South-Central Pacific clusters. No genetic differentiation was detected within archipelagos. These results highlight the legacy of past climate changes and the effects of large ocean expanses and circulation patterns on contrasting levels of connectivity at global, regional and local scales. Our results indicate a need for regional conservation units for gray reef sharks and pinpoint the isolation and vulnerability of their French Polynesian population. Nature Publishing Group UK 2019-11-01 /pmc/articles/PMC6825237/ /pubmed/31676818 http://dx.doi.org/10.1038/s41598-019-52221-6 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Boissin, E. Thorrold, S. R. Braun, C. D. Zhou, Y. Clua, E. E. Planes, S. Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title | Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title_full | Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title_fullStr | Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title_full_unstemmed | Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title_short | Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region |
title_sort | contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the indo-pacific region |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6825237/ https://www.ncbi.nlm.nih.gov/pubmed/31676818 http://dx.doi.org/10.1038/s41598-019-52221-6 |
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