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The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis
Fish and Fisheries, Volume: 22, Issue: 6, Pages: 1274 - 1306
Swansea University Author: Carlos Garcia De Leaniz
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DOI (Published version): 10.1111/faf.12587
Abstract
The survival of Atlantic salmon (Salmo salar), an increasingly rare anadromous species, has declined dramatically during its marine phase, with disproportionate impacts on the poorly understood early post-smolt period. Logistical constraints on collecting oceanic data to inform this issue pose a for...
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ISSN: | 1467-2960 1467-2979 |
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Wiley
2021
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To advance understanding of post-smolt distributional ecology in the North-east Atlantic, a comprehensive analysis of existing information was undertaken. Data were synthesized from 385 marine cruises, 10,202 individual trawls, and 9,269 captured post-smolts, spanning three decades and ~4.75 million km2 of ocean, with 3,423 individuals genetically assigned to regional phylogeographic origin. The findings confirm major migrational post-smolt aggregations on the continental shelf-edge off Ireland, Scotland and Norway, and an important marine foraging area in the Norwegian Sea. Genetic analysis shows that aggregational stock composition does not simply reflect distance to natal rivers, with northern phylogeographic stock groups significantly under-represented in sampled high-seas aggregations. It identifies a key foraging habitat for southern European post-smolts located in international waters immediately west of the Vøring Plateau escarpment, potentially exposing them to a high by-catch mortality from extra-territorial pelagic fisheries. Evidence of the differential distribution of regional stocks points to fundamental differences in their migration behaviours and may lead to inter-stock variation in responses to environmental change and marine survival. The study shows that understanding of post-smolt marine ecology, as regards to stock-specific variations in habitat utilization, biological performance and exposure to mortality factors, can be significantly advanced by data integration across studies and exploiting genetic approaches.</abstract><type>Journal Article</type><journal>Fish and Fisheries</journal><volume>22</volume><journalNumber>6</journalNumber><paginationStart>1274</paginationStart><paginationEnd>1306</paginationEnd><publisher>Wiley</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>1467-2960</issnPrint><issnElectronic>1467-2979</issnElectronic><keywords>genetic stock identification; marine distribution; migration behaviour; pelagic trawls; post-smolts; Salmo salar</keywords><publishedDay>1</publishedDay><publishedMonth>11</publishedMonth><publishedYear>2021</publishedYear><publishedDate>2021-11-01</publishedDate><doi>10.1111/faf.12587</doi><url/><notes/><college>COLLEGE NANME</college><department>Biosciences</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SBI</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>Norges Forskningsråd. 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2022-10-10T11:24:32.5551329 v2 58745 2021-11-22 The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis 1c70acd0fd64edb0856b7cf34393ab02 0000-0003-1650-2729 Carlos Garcia De Leaniz Carlos Garcia De Leaniz true false 2021-11-22 SBI The survival of Atlantic salmon (Salmo salar), an increasingly rare anadromous species, has declined dramatically during its marine phase, with disproportionate impacts on the poorly understood early post-smolt period. Logistical constraints on collecting oceanic data to inform this issue pose a formidable obstacle. To advance understanding of post-smolt distributional ecology in the North-east Atlantic, a comprehensive analysis of existing information was undertaken. Data were synthesized from 385 marine cruises, 10,202 individual trawls, and 9,269 captured post-smolts, spanning three decades and ~4.75 million km2 of ocean, with 3,423 individuals genetically assigned to regional phylogeographic origin. The findings confirm major migrational post-smolt aggregations on the continental shelf-edge off Ireland, Scotland and Norway, and an important marine foraging area in the Norwegian Sea. Genetic analysis shows that aggregational stock composition does not simply reflect distance to natal rivers, with northern phylogeographic stock groups significantly under-represented in sampled high-seas aggregations. It identifies a key foraging habitat for southern European post-smolts located in international waters immediately west of the Vøring Plateau escarpment, potentially exposing them to a high by-catch mortality from extra-territorial pelagic fisheries. Evidence of the differential distribution of regional stocks points to fundamental differences in their migration behaviours and may lead to inter-stock variation in responses to environmental change and marine survival. The study shows that understanding of post-smolt marine ecology, as regards to stock-specific variations in habitat utilization, biological performance and exposure to mortality factors, can be significantly advanced by data integration across studies and exploiting genetic approaches. Journal Article Fish and Fisheries 22 6 1274 1306 Wiley 1467-2960 1467-2979 genetic stock identification; marine distribution; migration behaviour; pelagic trawls; post-smolts; Salmo salar 1 11 2021 2021-11-01 10.1111/faf.12587 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University Norges Forskningsråd. Grant Number: 280308; Seventh Framework Programme. Grant Number: 212529 2022-10-10T11:24:32.5551329 2021-11-22T13:34:52.7182860 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences John Gilbey 1 Kjell Rong Utne 2 Vidar Wennevik 3 Alexander Christian Beck 4 Kyrre Kausrud 5 Kjetil Hindar 6 Carlos Garcia De Leaniz 0000-0003-1650-2729 7 Corrine Cherbonnel 8 Jamie Coughlan 9 Tom F. Cross 10 Eileen Dillane 11 Dennis Ensing 12 Eva García‐Vázquez 13 Lars R. Hole 14 Marianne Holm 15 Jens Christian Holst 16 Jan Arge Jacobsen 17 Arne J. Jensen 18 Sten Karlsson 19 Niall Ó Maoiléidigh 20 Kjell Arne Mork 21 Einar Eg Nielsen 22 Leif Nøttestad 23 Craig R. Primmer 24 Paulo Prodöhl 25 Sergey Prusov 26 Jamie R. Stevens 27 Katie Thomas 28 Ken Whelan 29 Philip McGinnity 30 Eric Verspoor 31 58745__21628__868a02f76aea4e66a74e3c96050282b3.pdf 58745.pdf 2021-11-22T13:39:08.9704144 Output 5565573 application/pdf Version of Record true This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. true eng http://creativecommons.org/licenses/by-nc-nd/4.0/ |
title |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
spellingShingle |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis Carlos Garcia De Leaniz |
title_short |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
title_full |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
title_fullStr |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
title_full_unstemmed |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
title_sort |
The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis |
author_id_str_mv |
1c70acd0fd64edb0856b7cf34393ab02 |
author_id_fullname_str_mv |
1c70acd0fd64edb0856b7cf34393ab02_***_Carlos Garcia De Leaniz |
author |
Carlos Garcia De Leaniz |
author2 |
John Gilbey Kjell Rong Utne Vidar Wennevik Alexander Christian Beck Kyrre Kausrud Kjetil Hindar Carlos Garcia De Leaniz Corrine Cherbonnel Jamie Coughlan Tom F. Cross Eileen Dillane Dennis Ensing Eva García‐Vázquez Lars R. Hole Marianne Holm Jens Christian Holst Jan Arge Jacobsen Arne J. Jensen Sten Karlsson Niall Ó Maoiléidigh Kjell Arne Mork Einar Eg Nielsen Leif Nøttestad Craig R. Primmer Paulo Prodöhl Sergey Prusov Jamie R. Stevens Katie Thomas Ken Whelan Philip McGinnity Eric Verspoor |
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Fish and Fisheries |
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Wiley |
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The survival of Atlantic salmon (Salmo salar), an increasingly rare anadromous species, has declined dramatically during its marine phase, with disproportionate impacts on the poorly understood early post-smolt period. Logistical constraints on collecting oceanic data to inform this issue pose a formidable obstacle. To advance understanding of post-smolt distributional ecology in the North-east Atlantic, a comprehensive analysis of existing information was undertaken. Data were synthesized from 385 marine cruises, 10,202 individual trawls, and 9,269 captured post-smolts, spanning three decades and ~4.75 million km2 of ocean, with 3,423 individuals genetically assigned to regional phylogeographic origin. The findings confirm major migrational post-smolt aggregations on the continental shelf-edge off Ireland, Scotland and Norway, and an important marine foraging area in the Norwegian Sea. Genetic analysis shows that aggregational stock composition does not simply reflect distance to natal rivers, with northern phylogeographic stock groups significantly under-represented in sampled high-seas aggregations. It identifies a key foraging habitat for southern European post-smolts located in international waters immediately west of the Vøring Plateau escarpment, potentially exposing them to a high by-catch mortality from extra-territorial pelagic fisheries. Evidence of the differential distribution of regional stocks points to fundamental differences in their migration behaviours and may lead to inter-stock variation in responses to environmental change and marine survival. The study shows that understanding of post-smolt marine ecology, as regards to stock-specific variations in habitat utilization, biological performance and exposure to mortality factors, can be significantly advanced by data integration across studies and exploiting genetic approaches. |
published_date |
2021-11-01T04:15:31Z |
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1763754043271806976 |
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11.029921 |