Timing of squid migration reflects North Atlantic climate variability.
The environmental and biotic conditions affecting fisheries for cephalopods are only partially understood. A problem central to this is how climate change may influence population movements by altering the availability of thermal resources. In this study we investigate the links between climate and...
Published in: | Proceedings of the Royal Society of London. Series B: Biological Sciences |
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ftpubmed:oai:pubmedcentral.nih.gov:1088923 2023-05-15T17:30:55+02:00 Timing of squid migration reflects North Atlantic climate variability. Sims, D W Genner, M J Southward, A J Hawkins, S J 2001-12-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1088923 http://www.ncbi.nlm.nih.gov/pubmed/11749718 https://doi.org/10.1098/rspb.2001.1847 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1088923 http://www.ncbi.nlm.nih.gov/pubmed/11749718 http://dx.doi.org/10.1098/rspb.2001.1847 Article Text 2001 ftpubmed https://doi.org/10.1098/rspb.2001.1847 2013-08-30T08:44:45Z The environmental and biotic conditions affecting fisheries for cephalopods are only partially understood. A problem central to this is how climate change may influence population movements by altering the availability of thermal resources. In this study we investigate the links between climate and sea-temperature changes and squid arrival time off southwestern England over a 20-year period. We show that veined squid (Loligo forbesi) migrate eastward in the English Channel earlier when water in the preceding months is warmer, and that higher temperatures and early arrival correspond with warm (positive) phases of the North Atlantic oscillation (NAO). The timing of squid peak abundance advanced by 120-150 days in the warmest years ('early' years) compared with the coldest ('late' years). Furthermore, sea-bottom temperature was closely linked to the extent of squid movement. Temperature increases over the five months prior to and during the month of peak squid abundance did not differ between early and late years, indicating squid responded to temperature changes independently of time of year. We conclude that the temporal variation in peak abundance of squid seen off Plymouth represents temperature-dependent movement, which is in turn mediated by climatic changes associated with the NAO. Such climate-mediated movement may be a widespread characteristic of cephalopod populations worldwide, and may have implications for future fisheries management because global warming may alter both the timing and location of peak population abundance. Text North Atlantic North Atlantic oscillation PubMed Central (PMC) Proceedings of the Royal Society of London. Series B: Biological Sciences 268 1485 2607 2611 |
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Article Sims, D W Genner, M J Southward, A J Hawkins, S J Timing of squid migration reflects North Atlantic climate variability. |
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description |
The environmental and biotic conditions affecting fisheries for cephalopods are only partially understood. A problem central to this is how climate change may influence population movements by altering the availability of thermal resources. In this study we investigate the links between climate and sea-temperature changes and squid arrival time off southwestern England over a 20-year period. We show that veined squid (Loligo forbesi) migrate eastward in the English Channel earlier when water in the preceding months is warmer, and that higher temperatures and early arrival correspond with warm (positive) phases of the North Atlantic oscillation (NAO). The timing of squid peak abundance advanced by 120-150 days in the warmest years ('early' years) compared with the coldest ('late' years). Furthermore, sea-bottom temperature was closely linked to the extent of squid movement. Temperature increases over the five months prior to and during the month of peak squid abundance did not differ between early and late years, indicating squid responded to temperature changes independently of time of year. We conclude that the temporal variation in peak abundance of squid seen off Plymouth represents temperature-dependent movement, which is in turn mediated by climatic changes associated with the NAO. Such climate-mediated movement may be a widespread characteristic of cephalopod populations worldwide, and may have implications for future fisheries management because global warming may alter both the timing and location of peak population abundance. |
format |
Text |
author |
Sims, D W Genner, M J Southward, A J Hawkins, S J |
author_facet |
Sims, D W Genner, M J Southward, A J Hawkins, S J |
author_sort |
Sims, D W |
title |
Timing of squid migration reflects North Atlantic climate variability. |
title_short |
Timing of squid migration reflects North Atlantic climate variability. |
title_full |
Timing of squid migration reflects North Atlantic climate variability. |
title_fullStr |
Timing of squid migration reflects North Atlantic climate variability. |
title_full_unstemmed |
Timing of squid migration reflects North Atlantic climate variability. |
title_sort |
timing of squid migration reflects north atlantic climate variability. |
publishDate |
2001 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1088923 http://www.ncbi.nlm.nih.gov/pubmed/11749718 https://doi.org/10.1098/rspb.2001.1847 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1088923 http://www.ncbi.nlm.nih.gov/pubmed/11749718 http://dx.doi.org/10.1098/rspb.2001.1847 |
op_doi |
https://doi.org/10.1098/rspb.2001.1847 |
container_title |
Proceedings of the Royal Society of London. Series B: Biological Sciences |
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268 |
container_issue |
1485 |
container_start_page |
2607 |
op_container_end_page |
2611 |
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1766128067374219264 |