Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis
Abstract The blue skate (Dipturus batis) has a patchy distribution across the North‐East Atlantic Ocean, largely restricted to occidental seas around the British Isles following fisheries‐induced population declines and extirpations. The viability of remnant populations remains uncertain and could b...
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ftdoajarticles:oai:doaj.org/article:14cc62406f7647e9812441f8a25a15f9 2023-05-15T16:00:59+02:00 Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis Aurélien Delaval Michelle Frost Victoria Bendall Stuart J. Hetherington David Stirling Galice Hoarau Catherine S. Jones Leslie R. Noble 2022-01-01T00:00:00Z https://doi.org/10.1111/eva.13327 https://doaj.org/article/14cc62406f7647e9812441f8a25a15f9 EN eng Wiley https://doi.org/10.1111/eva.13327 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13327 https://doaj.org/article/14cc62406f7647e9812441f8a25a15f9 Evolutionary Applications, Vol 15, Iss 1, Pp 78-94 (2022) blue skate climate change conservation Dipturus batis population genomics seascape genomics Evolution QH359-425 article 2022 ftdoajarticles https://doi.org/10.1111/eva.13327 2022-12-31T07:33:15Z Abstract The blue skate (Dipturus batis) has a patchy distribution across the North‐East Atlantic Ocean, largely restricted to occidental seas around the British Isles following fisheries‐induced population declines and extirpations. The viability of remnant populations remains uncertain and could be impacted by continued fishing and by‐catch pressure, and the projected impacts of climate change. We genotyped 503 samples of D. batis, obtained opportunistically from the widest available geographic range, across 6 350 single nucleotide polymorphisms (SNPs) using a reduced‐representation sequencing approach. Genotypes were used to assess the species’ contemporary population structure, estimate effective population sizes and identify putative signals of selection in relation to environmental variables using a seascape genomics approach. We identified genetic discontinuities between inshore (British Isles) and offshore (Rockall and Faroe Island) populations, with differentiation most pronounced across the deep waters of the Rockall Trough. Effective population sizes were largest in the Celtic Sea and Rockall, but low enough to be of potential conservation concern among Scottish and Faroese sites. Among the 21 candidate SNPs under positive selection was one significantly correlated with environmental variables predicted to be affected by climate change, including bottom temperature, salinity and pH. The paucity of well‐annotated elasmobranch genomes precluded us from identifying a putative function for this SNP. Nevertheless, our findings suggest that climate change could inflict a strong selective force upon remnant populations of D. batis, further constraining its already‐restricted habitat. Furthermore, the results provide fundamental insights on the distribution, behaviour and evolutionary biology of D. batis in the North‐East Atlantic that will be useful for the establishment of conservation actions for this and other critically endangered elasmobranchs. Article in Journal/Newspaper Dipturus batis North East Atlantic Directory of Open Access Journals: DOAJ Articles Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Evolutionary Applications 15 1 78 94 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
blue skate climate change conservation Dipturus batis population genomics seascape genomics Evolution QH359-425 |
spellingShingle |
blue skate climate change conservation Dipturus batis population genomics seascape genomics Evolution QH359-425 Aurélien Delaval Michelle Frost Victoria Bendall Stuart J. Hetherington David Stirling Galice Hoarau Catherine S. Jones Leslie R. Noble Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
topic_facet |
blue skate climate change conservation Dipturus batis population genomics seascape genomics Evolution QH359-425 |
description |
Abstract The blue skate (Dipturus batis) has a patchy distribution across the North‐East Atlantic Ocean, largely restricted to occidental seas around the British Isles following fisheries‐induced population declines and extirpations. The viability of remnant populations remains uncertain and could be impacted by continued fishing and by‐catch pressure, and the projected impacts of climate change. We genotyped 503 samples of D. batis, obtained opportunistically from the widest available geographic range, across 6 350 single nucleotide polymorphisms (SNPs) using a reduced‐representation sequencing approach. Genotypes were used to assess the species’ contemporary population structure, estimate effective population sizes and identify putative signals of selection in relation to environmental variables using a seascape genomics approach. We identified genetic discontinuities between inshore (British Isles) and offshore (Rockall and Faroe Island) populations, with differentiation most pronounced across the deep waters of the Rockall Trough. Effective population sizes were largest in the Celtic Sea and Rockall, but low enough to be of potential conservation concern among Scottish and Faroese sites. Among the 21 candidate SNPs under positive selection was one significantly correlated with environmental variables predicted to be affected by climate change, including bottom temperature, salinity and pH. The paucity of well‐annotated elasmobranch genomes precluded us from identifying a putative function for this SNP. Nevertheless, our findings suggest that climate change could inflict a strong selective force upon remnant populations of D. batis, further constraining its already‐restricted habitat. Furthermore, the results provide fundamental insights on the distribution, behaviour and evolutionary biology of D. batis in the North‐East Atlantic that will be useful for the establishment of conservation actions for this and other critically endangered elasmobranchs. |
format |
Article in Journal/Newspaper |
author |
Aurélien Delaval Michelle Frost Victoria Bendall Stuart J. Hetherington David Stirling Galice Hoarau Catherine S. Jones Leslie R. Noble |
author_facet |
Aurélien Delaval Michelle Frost Victoria Bendall Stuart J. Hetherington David Stirling Galice Hoarau Catherine S. Jones Leslie R. Noble |
author_sort |
Aurélien Delaval |
title |
Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
title_short |
Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
title_full |
Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
title_fullStr |
Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
title_full_unstemmed |
Population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate Dipturus batis |
title_sort |
population and seascape genomics of a critically endangered benthic elasmobranch, the blue skate dipturus batis |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1111/eva.13327 https://doaj.org/article/14cc62406f7647e9812441f8a25a15f9 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Rockall Trough |
geographic_facet |
Rockall Trough |
genre |
Dipturus batis North East Atlantic |
genre_facet |
Dipturus batis North East Atlantic |
op_source |
Evolutionary Applications, Vol 15, Iss 1, Pp 78-94 (2022) |
op_relation |
https://doi.org/10.1111/eva.13327 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13327 https://doaj.org/article/14cc62406f7647e9812441f8a25a15f9 |
op_doi |
https://doi.org/10.1111/eva.13327 |
container_title |
Evolutionary Applications |
container_volume |
15 |
container_issue |
1 |
container_start_page |
78 |
op_container_end_page |
94 |
_version_ |
1766396992982876160 |