Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration
Genetic analyses were undertaken on archived otoliths from juveniles representing historically strong year classes of northwest Atlantic redfish (Sebastes spp.) and on tissue samples from adults of known species and population of origin. The results indicated that the species composition of a year c...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2014-0149 2023-12-17T10:27:07+01:00 Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration Valentin, Alexandra E. Power, Don Sévigny, Jean-Marie Morán, Paloma 2015 http://dx.doi.org/10.1139/cjfas-2014-0149 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2014-0149 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2014-0149 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 72, issue 5, page 774-784 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2015 crcansciencepubl https://doi.org/10.1139/cjfas-2014-0149 2023-11-19T13:39:35Z Genetic analyses were undertaken on archived otoliths from juveniles representing historically strong year classes of northwest Atlantic redfish (Sebastes spp.) and on tissue samples from adults of known species and population of origin. The results indicated that the species composition of a year class is key information for understanding recruitment dynamics, with redfish species having distinct population-associated patterns of spatial dispersion. In the Gulf of St. Lawrence – Laurentian Channel area (GSL–LCH), the last strong year class (which supported the fishery for more than 30 years) belonged to Sebastes mentella and originated from the area. In contrast, four year classes that appeared abundant at young ages in research surveys in GSL–LCH but contributed only marginally to the adult population and the fishery of the region belonged to Sebastes fasciatus and carried the genetic signature of the adult population from the slope of the Newfoundland Grand Banks. Ocean currents and spatiotemporal trends in abundance-at-length suggest that the latter population uses the Gulf of St. Lawrence as a nursery area, with larvae and early juveniles drifting toward the Gulf of St. Lawrence and older juveniles migrating back to the slope of the Grand Banks after about 5–6 years. It is suggested that juvenile migration behaviour is a postsettlement process that plays an important role in redfish recruitment dynamics and carries both demographic and evolutionary implications. Article in Journal/Newspaper Atlantic redfish Newfoundland Northwest Atlantic Sebastes mentella Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 72 5 774 784 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Valentin, Alexandra E. Power, Don Sévigny, Jean-Marie Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Genetic analyses were undertaken on archived otoliths from juveniles representing historically strong year classes of northwest Atlantic redfish (Sebastes spp.) and on tissue samples from adults of known species and population of origin. The results indicated that the species composition of a year class is key information for understanding recruitment dynamics, with redfish species having distinct population-associated patterns of spatial dispersion. In the Gulf of St. Lawrence – Laurentian Channel area (GSL–LCH), the last strong year class (which supported the fishery for more than 30 years) belonged to Sebastes mentella and originated from the area. In contrast, four year classes that appeared abundant at young ages in research surveys in GSL–LCH but contributed only marginally to the adult population and the fishery of the region belonged to Sebastes fasciatus and carried the genetic signature of the adult population from the slope of the Newfoundland Grand Banks. Ocean currents and spatiotemporal trends in abundance-at-length suggest that the latter population uses the Gulf of St. Lawrence as a nursery area, with larvae and early juveniles drifting toward the Gulf of St. Lawrence and older juveniles migrating back to the slope of the Grand Banks after about 5–6 years. It is suggested that juvenile migration behaviour is a postsettlement process that plays an important role in redfish recruitment dynamics and carries both demographic and evolutionary implications. |
author2 |
Morán, Paloma |
format |
Article in Journal/Newspaper |
author |
Valentin, Alexandra E. Power, Don Sévigny, Jean-Marie |
author_facet |
Valentin, Alexandra E. Power, Don Sévigny, Jean-Marie |
author_sort |
Valentin, Alexandra E. |
title |
Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
title_short |
Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
title_full |
Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
title_fullStr |
Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
title_full_unstemmed |
Understanding recruitment patterns of historically strong juvenile year classes in redfish ( Sebastes spp.): the importance of species identity, population structure, and juvenile migration |
title_sort |
understanding recruitment patterns of historically strong juvenile year classes in redfish ( sebastes spp.): the importance of species identity, population structure, and juvenile migration |
publisher |
Canadian Science Publishing |
publishDate |
2015 |
url |
http://dx.doi.org/10.1139/cjfas-2014-0149 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2014-0149 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2014-0149 |
genre |
Atlantic redfish Newfoundland Northwest Atlantic Sebastes mentella |
genre_facet |
Atlantic redfish Newfoundland Northwest Atlantic Sebastes mentella |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 72, issue 5, page 774-784 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2014-0149 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
72 |
container_issue |
5 |
container_start_page |
774 |
op_container_end_page |
784 |
_version_ |
1785578894872543232 |