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The early marine distribution of Atlantic salmon in the North‐east Atlantic: A genetically informed stock‐specific synthesis

John Gilbey, Kjell Rong Utne, Vidar Wennevik, Alexander Christian Beck, Kyrre Kausrud, Kjetil Hindar, Carlos Garcia De Leaniz Orcid Logo, 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

Fish and Fisheries, Volume: 22, Issue: 6, Pages: 1274 - 1306

Swansea University Author: Carlos Garcia De Leaniz Orcid Logo

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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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Published in: Fish and Fisheries
ISSN: 1467-2960 1467-2979
Published: 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. 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spelling 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
format Journal article
container_title Fish and Fisheries
container_volume 22
container_issue 6
container_start_page 1274
publishDate 2021
institution Swansea University
issn 1467-2960
1467-2979
doi_str_mv 10.1111/faf.12587
publisher Wiley
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description 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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score 11.012678

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