A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic
Characterizing the extent of genetic differentiation among individuals and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. The Greenland Halibut is one of the main demersal fish species to be commercially exploited in East...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.992504/full |
| _version_ | 1798006123410751488 |
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| author | A-L. Ferchaud E. Normandeau C. Babin K. Præbel Rasmus Hedeholm C. Audet J. Morgan M. Treble W. Walkusz P. Sirois L. Bernatchez |
| author_facet | A-L. Ferchaud E. Normandeau C. Babin K. Præbel Rasmus Hedeholm C. Audet J. Morgan M. Treble W. Walkusz P. Sirois L. Bernatchez |
| author_sort | A-L. Ferchaud |
| collection | DOAJ |
| description | Characterizing the extent of genetic differentiation among individuals and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. The Greenland Halibut is one of the main demersal fish species to be commercially exploited in Eastern Canada, and accurate information on geographic population structure and local adaptation is required to ensure the long-term presence of this species. We generated high-quality whole-genome sequencing data for 1,297 Greenland Halibut sampled across 32 locations throughout the Northwest Atlantic (from Arctic Canadian and Greenlandic coasts to the Gulf of St Lawrence). Population genetic structure was analyzed, revealing an absence of population differentiation between Canada and west Greenland but significant genetic differentiation between the Gulf of Saint Lawrence and the remainder of the Northwest Atlantic. Except for Gulf of Saint Lawrence, Greenland Halibut thus appear to be panmictic throughout the Northwest Atlantic. Environmental Association Analyses revealed that the environment explained up to 51 % might be replaced by 51% of the differentiation observed between the two stocks, with both ocean-bottom and surface variables (e.g., temperature and oxygen) involved in the observed genomic differentiation. Altogether, these results indicate that phenotypic differences previously observed between the Gulf of Saint Lawrence and the Northwest Atlantic likely resulted from functional adaptive divergence to their respective environmental conditions. Using coalescent simulations, we also assessed how high levels of migration between the two stocks would allow Greenland Halibut to potentially escape unfavorable environmental conditions in the Gulf of Saint Lawrence. In addition to supporting the management of this important exploited species, this work highlights the utility of using comprehensive genomic datasets to characterize the effects of climate change across a wider range of species. |
| first_indexed | 2024-04-11T12:50:06Z |
| format | Article |
| id | doaj.art-c78d687dcecb4392943b9f650aa4dae3 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-11T12:50:06Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-c78d687dcecb4392943b9f650aa4dae32022-12-22T04:23:14ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-09-01910.3389/fmars.2022.992504992504A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest AtlanticA-L. Ferchaud0E. Normandeau1C. Babin2K. Præbel3Rasmus Hedeholm4C. Audet5J. Morgan6M. Treble7W. Walkusz8P. Sirois9L. Bernatchez10Département de Biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, CanadaDépartement de Biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, CanadaDépartement de Biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, CanadaNorwegian College of Fishery Science, UiT the Arctic University of Norway, Tromsø, NorwaySustainable Fisheries Greenland, Skørping, DenmarkInstitut des sciences de la mer de Rimouski, Université du Québec à Rimouski, Rimouski, QC, CanadaFisheries and Oceans Canada, St. John’s, NF, CanadaFisheries and Oceans Canada, Winnipeg Department, Arctic Aquatic Research Division, Winnipeg, AB, CanadaFisheries and Oceans Canada, Winnipeg Department, Arctic Aquatic Research Division, Winnipeg, AB, CanadaChaire de recherche sur les espèces aquatiques exploitées, Département des sciences fondamentales, Université du Québec à Chicoutimi, Chicoutimi, QC, CanadaDépartement de Biologie, Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, CanadaCharacterizing the extent of genetic differentiation among individuals and its distribution across the genome is increasingly important to inform both conservation and management of exploited species. The Greenland Halibut is one of the main demersal fish species to be commercially exploited in Eastern Canada, and accurate information on geographic population structure and local adaptation is required to ensure the long-term presence of this species. We generated high-quality whole-genome sequencing data for 1,297 Greenland Halibut sampled across 32 locations throughout the Northwest Atlantic (from Arctic Canadian and Greenlandic coasts to the Gulf of St Lawrence). Population genetic structure was analyzed, revealing an absence of population differentiation between Canada and west Greenland but significant genetic differentiation between the Gulf of Saint Lawrence and the remainder of the Northwest Atlantic. Except for Gulf of Saint Lawrence, Greenland Halibut thus appear to be panmictic throughout the Northwest Atlantic. Environmental Association Analyses revealed that the environment explained up to 51 % might be replaced by 51% of the differentiation observed between the two stocks, with both ocean-bottom and surface variables (e.g., temperature and oxygen) involved in the observed genomic differentiation. Altogether, these results indicate that phenotypic differences previously observed between the Gulf of Saint Lawrence and the Northwest Atlantic likely resulted from functional adaptive divergence to their respective environmental conditions. Using coalescent simulations, we also assessed how high levels of migration between the two stocks would allow Greenland Halibut to potentially escape unfavorable environmental conditions in the Gulf of Saint Lawrence. In addition to supporting the management of this important exploited species, this work highlights the utility of using comprehensive genomic datasets to characterize the effects of climate change across a wider range of species.https://www.frontiersin.org/articles/10.3389/fmars.2022.992504/fullGreenland halibutGulf of Saint LawrenceNorthwest Atlanticwhole-genome sequencingenvironmental association |
| spellingShingle | A-L. Ferchaud E. Normandeau C. Babin K. Præbel Rasmus Hedeholm C. Audet J. Morgan M. Treble W. Walkusz P. Sirois L. Bernatchez A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic Frontiers in Marine Science Greenland halibut Gulf of Saint Lawrence Northwest Atlantic whole-genome sequencing environmental association |
| title | A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic |
| title_full | A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic |
| title_fullStr | A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic |
| title_full_unstemmed | A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic |
| title_short | A cold-water fish striving in a warming ocean: Insights from whole-genome sequencing of the Greenland halibut in the Northwest Atlantic |
| title_sort | cold water fish striving in a warming ocean insights from whole genome sequencing of the greenland halibut in the northwest atlantic |
| topic | Greenland halibut Gulf of Saint Lawrence Northwest Atlantic whole-genome sequencing environmental association |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.992504/full |
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