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Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter

It has been suggested that observed spatial variation in mackerel fisheries, extending over several hundreds of kilometers, is reflective of climate-driven changes in mackerel migration patterns. Previous studies have been unable to clearly demonstrate this link. In this paper we demonstrate correla...

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Autores principales: Jansen, Teunis, Campbell, Andrew, Kelly, Ciarán, Hátún, Hjálmar, Payne, Mark R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3519697/
https://www.ncbi.nlm.nih.gov/pubmed/23251570
http://dx.doi.org/10.1371/journal.pone.0051541
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author Jansen, Teunis
Campbell, Andrew
Kelly, Ciarán
Hátún, Hjálmar
Payne, Mark R.
author_facet Jansen, Teunis
Campbell, Andrew
Kelly, Ciarán
Hátún, Hjálmar
Payne, Mark R.
author_sort Jansen, Teunis
collection PubMed
description It has been suggested that observed spatial variation in mackerel fisheries, extending over several hundreds of kilometers, is reflective of climate-driven changes in mackerel migration patterns. Previous studies have been unable to clearly demonstrate this link. In this paper we demonstrate correlation between temperature and mackerel migration/distribution as proxied by mackerel catch data from both scientific bottom trawl surveys and commercial fisheries. We show that mackerel aggregate and migrate distances of up to 500 km along the continental shelf edge from mid-November to early March. The path of this migration coincides with the location of the relatively warm shelf edge current and, as a consequence of this affinity, mackerel are guided towards the main spawning area in the south. Using a simulated time series of temperature of the shelf edge current we show that variations in the timing of the migration are significantly correlated to temperature fluctuations within the current. The proposed proxies for mackerel distribution were found to be significantly correlated. However, the correlations were weak and only significant during periods without substantial legislative or technical developments. Substantial caution should therefore be exercised when using such data as proxies for mackerel distribution. Our results include a new temperature record for the shelf edge current obtained by embedding the available hydrographic observations within a statistical model needed to understand the migration through large parts of the life of adult mackerel and for the management of this major international fishery.
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spelling pubmed-35196972012-12-18 Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter Jansen, Teunis Campbell, Andrew Kelly, Ciarán Hátún, Hjálmar Payne, Mark R. PLoS One Research Article It has been suggested that observed spatial variation in mackerel fisheries, extending over several hundreds of kilometers, is reflective of climate-driven changes in mackerel migration patterns. Previous studies have been unable to clearly demonstrate this link. In this paper we demonstrate correlation between temperature and mackerel migration/distribution as proxied by mackerel catch data from both scientific bottom trawl surveys and commercial fisheries. We show that mackerel aggregate and migrate distances of up to 500 km along the continental shelf edge from mid-November to early March. The path of this migration coincides with the location of the relatively warm shelf edge current and, as a consequence of this affinity, mackerel are guided towards the main spawning area in the south. Using a simulated time series of temperature of the shelf edge current we show that variations in the timing of the migration are significantly correlated to temperature fluctuations within the current. The proposed proxies for mackerel distribution were found to be significantly correlated. However, the correlations were weak and only significant during periods without substantial legislative or technical developments. Substantial caution should therefore be exercised when using such data as proxies for mackerel distribution. Our results include a new temperature record for the shelf edge current obtained by embedding the available hydrographic observations within a statistical model needed to understand the migration through large parts of the life of adult mackerel and for the management of this major international fishery. Public Library of Science 2012-12-10 /pmc/articles/PMC3519697/ /pubmed/23251570 http://dx.doi.org/10.1371/journal.pone.0051541 Text en © 2012 Jansen et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Jansen, Teunis
Campbell, Andrew
Kelly, Ciarán
Hátún, Hjálmar
Payne, Mark R.
Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title_full Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title_fullStr Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title_full_unstemmed Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title_short Migration and Fisheries of North East Atlantic Mackerel (Scomber scombrus) in Autumn and Winter
title_sort migration and fisheries of north east atlantic mackerel (scomber scombrus) in autumn and winter
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3519697/
https://www.ncbi.nlm.nih.gov/pubmed/23251570
http://dx.doi.org/10.1371/journal.pone.0051541
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