Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis
The Northeast Atlantic mackerel (Scomber scombrus) stock has increased and expanded its summer feeding migration west- and northwards since 2006, entailing large geopolitical challenges for the countries harvesting this species. A common perspective is that climatic warming opens up new regions for...
Published in: | Elementa: Science of the Anthropocene |
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2016
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ftuhipublicatio:oai:pure.atira.dk:publications/9f24d619-77dd-44a6-b846-343d930f8e47 2024-02-04T10:01:25+01:00 Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis Pacariz, Selma Hatun, Hjalmar Jacobsen, Jan Johnson, Clare Eliasen, Solva Rey, Francisco 2016-05-05 application/pdf https://pure.uhi.ac.uk/en/publications/9f24d619-77dd-44a6-b846-343d930f8e47 https://doi.org/10.12952/journal.elementa.000105 https://pureadmin.uhi.ac.uk/ws/files/1915288/Pacariz_etal_withFigs.pdf eng eng info:eu-repo/semantics/openAccess Pacariz , S , Hatun , H , Jacobsen , J , Johnson , C , Eliasen , S & Rey , F 2016 , ' Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis ' , Elementa: Science of the Anthropocene , vol. 4 . https://doi.org/10.12952/journal.elementa.000105 article 2016 ftuhipublicatio https://doi.org/10.12952/journal.elementa.000105 2024-01-11T23:21:12Z The Northeast Atlantic mackerel (Scomber scombrus) stock has increased and expanded its summer feeding migration west- and northwards since 2006, entailing large geopolitical challenges for the countries harvesting this species. A common perspective is that climatic warming opens up new regions for biota in the north. It has also been suggested that the presently large pelagic fish stocks deplete prey resources in the eastern North Atlantic during their summer feeding phase, forcing the stocks west towards the Irminger Sea in their search for food. Here, we suggest that the declining nutrient (silicate) concentrations observed along the northern European continental slope reduce primary and thus secondary production, exacerbating food scarceness in the east and adding to the incentive to migrate westward. The new westward feeding route requires that the fish cross the Iceland Basin, which during the summer season quickly becomes nutrient-depleted and thus might act as a barrier to migration after the spring bloom. Using mackerel and zooplankton abundance data from the International Ecosystem Summer Surveys in the Nordic Seas, we suggest that the oligotrophic waters in the central Iceland Basin force the fish to migrate through a narrow ‘corridor’ along the south Iceland shelf, where nutrients are replenished and both primary and secondary production are higher. Article in Journal/Newspaper Iceland Nordic Seas North Atlantic Northeast Atlantic University of the Highlands and Islands: Research Database of UHI Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Elementa: Science of the Anthropocene 4 000105 |
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Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
description |
The Northeast Atlantic mackerel (Scomber scombrus) stock has increased and expanded its summer feeding migration west- and northwards since 2006, entailing large geopolitical challenges for the countries harvesting this species. A common perspective is that climatic warming opens up new regions for biota in the north. It has also been suggested that the presently large pelagic fish stocks deplete prey resources in the eastern North Atlantic during their summer feeding phase, forcing the stocks west towards the Irminger Sea in their search for food. Here, we suggest that the declining nutrient (silicate) concentrations observed along the northern European continental slope reduce primary and thus secondary production, exacerbating food scarceness in the east and adding to the incentive to migrate westward. The new westward feeding route requires that the fish cross the Iceland Basin, which during the summer season quickly becomes nutrient-depleted and thus might act as a barrier to migration after the spring bloom. Using mackerel and zooplankton abundance data from the International Ecosystem Summer Surveys in the Nordic Seas, we suggest that the oligotrophic waters in the central Iceland Basin force the fish to migrate through a narrow ‘corridor’ along the south Iceland shelf, where nutrients are replenished and both primary and secondary production are higher. |
format |
Article in Journal/Newspaper |
author |
Pacariz, Selma Hatun, Hjalmar Jacobsen, Jan Johnson, Clare Eliasen, Solva Rey, Francisco |
spellingShingle |
Pacariz, Selma Hatun, Hjalmar Jacobsen, Jan Johnson, Clare Eliasen, Solva Rey, Francisco Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
author_facet |
Pacariz, Selma Hatun, Hjalmar Jacobsen, Jan Johnson, Clare Eliasen, Solva Rey, Francisco |
author_sort |
Pacariz, Selma |
title |
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
title_short |
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
title_full |
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
title_fullStr |
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
title_full_unstemmed |
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis |
title_sort |
nutrient-driven poleward expansion of the northeast atlantic mackerel (scomber scombrus) stock: a new hypothesis |
publishDate |
2016 |
url |
https://pure.uhi.ac.uk/en/publications/9f24d619-77dd-44a6-b846-343d930f8e47 https://doi.org/10.12952/journal.elementa.000105 https://pureadmin.uhi.ac.uk/ws/files/1915288/Pacariz_etal_withFigs.pdf |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Iceland Nordic Seas North Atlantic Northeast Atlantic |
genre_facet |
Iceland Nordic Seas North Atlantic Northeast Atlantic |
op_source |
Pacariz , S , Hatun , H , Jacobsen , J , Johnson , C , Eliasen , S & Rey , F 2016 , ' Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: a new hypothesis ' , Elementa: Science of the Anthropocene , vol. 4 . https://doi.org/10.12952/journal.elementa.000105 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.12952/journal.elementa.000105 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
4 |
container_start_page |
000105 |
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1789967279100788736 |