Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region

Abstract 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 globa...

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Autores principales:	E. Boissin, S. R. Thorrold, C. D. Braun, Y. Zhou, E. E. Clua, S. Planes
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/812a258434014a348af21ac57cd79586
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spelling	oai:doaj.org-article:812a258434014a348af21ac57cd795862021-12-02T15:09:46ZContrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region10.1038/s41598-019-52221-62045-2322https://doaj.org/article/812a258434014a348af21ac57cd795862019-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-52221-6https://doaj.org/toc/2045-2322Abstract 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 (FST = 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.E. BoissinS. R. ThorroldC. D. BraunY. ZhouE. E. CluaS. PlanesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q E. Boissin S. R. Thorrold C. D. Braun Y. Zhou E. E. Clua S. Planes Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region
description	Abstract 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 (FST = 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	article
author	E. Boissin S. R. Thorrold C. D. Braun Y. Zhou E. E. Clua S. Planes
author_facet	E. Boissin S. R. Thorrold C. D. Braun Y. Zhou E. E. Clua S. Planes
author_sort	E. Boissin
title	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_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_sort	contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the indo-pacific region
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/812a258434014a348af21ac57cd79586
work_keys_str_mv	AT eboissin contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion AT srthorrold contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion AT cdbraun contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion AT yzhou contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion AT eeclua contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion AT splanes contrastingglobalregionalandlocalpatternsofgeneticstructureingrayreefsharkpopulationsfromtheindopacificregion
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Contrasting global, regional and local patterns of genetic structure in gray reef shark populations from the Indo-Pacific region

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