Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry
Recent genomic study on Greenland halibut Reinhardtius hippoglossoides throughout the Northwest Atlantic revealed genetic differentiation between the Gulf of St. Lawrence and the remainder of the Northwest Atlantic. Knowledge of migration and thus connectivity among fish populations is key to unders...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
2023
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Online Access: | http://dx.doi.org/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2022-0081 |
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crcansciencepubl:10.1139/cjfas-2022-0081 2024-06-23T07:53:14+00:00 Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry Bassi, Laélien Tremblay, Réjean Ferchaud, Anne-Laure Bernatchez, Louis Robert, Dominique Sirois, Pascal 2023 http://dx.doi.org/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2022-0081 en eng Canadian Science Publishing https://creativecommons.org/licenses/by/4.0/deed.en_GB Canadian Journal of Fisheries and Aquatic Sciences volume 80, issue 8, page 1301-1312 ISSN 0706-652X 1205-7533 journal-article 2023 crcansciencepubl https://doi.org/10.1139/cjfas-2022-0081 2024-06-06T04:11:14Z Recent genomic study on Greenland halibut Reinhardtius hippoglossoides throughout the Northwest Atlantic revealed genetic differentiation between the Gulf of St. Lawrence and the remainder of the Northwest Atlantic. Knowledge of migration and thus connectivity among fish populations is key to understanding the stock dynamics of commercial species and establishing effective management strategies. In this study, we use otolith microchemistry to assess the population structure and define more clearly the potential connectivity of Greenland halibut among Saguenay Fjord, the Estuary, and the Gulf of St. Lawrence (EGSL) and outside this system. Otolith margins and cores were analyzed to determine the elemental fingerprints. The margin elemental fingerprints (Mg, Sr, and Ba) were used to infer spatial differentiation, and quadratic discriminant analysis resulted in an overall reclassification success of fish to their capture site of 59%. The core elemental fingerprints indicated three chemically distinct juvenile sources, suggesting high connectivity in the EGSL supporting the St. Lawrence Estuary as a main nursery. Our results also suggest that one of these three sources has a smaller contribution relative to the other sites. Article in Journal/Newspaper Greenland Northwest Atlantic Canadian Science Publishing Greenland Canadian Journal of Fisheries and Aquatic Sciences 80 8 1301 1312 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Recent genomic study on Greenland halibut Reinhardtius hippoglossoides throughout the Northwest Atlantic revealed genetic differentiation between the Gulf of St. Lawrence and the remainder of the Northwest Atlantic. Knowledge of migration and thus connectivity among fish populations is key to understanding the stock dynamics of commercial species and establishing effective management strategies. In this study, we use otolith microchemistry to assess the population structure and define more clearly the potential connectivity of Greenland halibut among Saguenay Fjord, the Estuary, and the Gulf of St. Lawrence (EGSL) and outside this system. Otolith margins and cores were analyzed to determine the elemental fingerprints. The margin elemental fingerprints (Mg, Sr, and Ba) were used to infer spatial differentiation, and quadratic discriminant analysis resulted in an overall reclassification success of fish to their capture site of 59%. The core elemental fingerprints indicated three chemically distinct juvenile sources, suggesting high connectivity in the EGSL supporting the St. Lawrence Estuary as a main nursery. Our results also suggest that one of these three sources has a smaller contribution relative to the other sites. |
format |
Article in Journal/Newspaper |
author |
Bassi, Laélien Tremblay, Réjean Ferchaud, Anne-Laure Bernatchez, Louis Robert, Dominique Sirois, Pascal |
spellingShingle |
Bassi, Laélien Tremblay, Réjean Ferchaud, Anne-Laure Bernatchez, Louis Robert, Dominique Sirois, Pascal Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
author_facet |
Bassi, Laélien Tremblay, Réjean Ferchaud, Anne-Laure Bernatchez, Louis Robert, Dominique Sirois, Pascal |
author_sort |
Bassi, Laélien |
title |
Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
title_short |
Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
title_full |
Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
title_fullStr |
Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
title_full_unstemmed |
Connectivity and natal sources of Greenland halibut in the gulf of St. Lawrence inferred from otolith chemistry |
title_sort |
connectivity and natal sources of greenland halibut in the gulf of st. lawrence inferred from otolith chemistry |
publisher |
Canadian Science Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2022-0081 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2022-0081 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Northwest Atlantic |
genre_facet |
Greenland Northwest Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 80, issue 8, page 1301-1312 ISSN 0706-652X 1205-7533 |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.en_GB |
op_doi |
https://doi.org/10.1139/cjfas-2022-0081 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
80 |
container_issue |
8 |
container_start_page |
1301 |
op_container_end_page |
1312 |
_version_ |
1802644794496778240 |