Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory
Fisheries independent monitoring of widely distributed pelagic fish species which conduct large seasonal migrations is logistically complex and expensive.One of the commercially most important examples of such a species in the Northeast Atlantic Ocean is mackerel for which up to recently only an int...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://research.wur.nl/en/publications/opportunistically-recorded-acoustic-data-support-northeast-atlant https://doi.org/10.1093/icesjms/fsv243 |
id |
ftunivwagenin:oai:library.wur.nl:wurpubs/496919 |
---|---|
record_format |
openpolar |
spelling |
ftunivwagenin:oai:library.wur.nl:wurpubs/496919 2024-02-04T10:03:09+01:00 Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory vander Kooij, Jeroen Fassler, S.M.M. Stephens, D. Readdy, Lisa Scott, B. Roel, Beatriz 2016 application/pdf https://research.wur.nl/en/publications/opportunistically-recorded-acoustic-data-support-northeast-atlant https://doi.org/10.1093/icesjms/fsv243 en eng https://edepot.wur.nl/373022 https://research.wur.nl/en/publications/opportunistically-recorded-acoustic-data-support-northeast-atlant doi:10.1093/icesjms/fsv243 info:eu-repo/semantics/restrictedAccess Wageningen University & Research ICES Journal of Marine Science 73 (2016) 4 ISSN: 1054-3139 North sea fisheries acoustics mackerel scomber scombrus info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2016 ftunivwagenin https://doi.org/10.1093/icesjms/fsv243 2024-01-10T23:18:34Z Fisheries independent monitoring of widely distributed pelagic fish species which conduct large seasonal migrations is logistically complex and expensive.One of the commercially most important examples of such a species in the Northeast Atlantic Ocean is mackerel for which up to recently only an international triennial egg survey contributed to the stock assessment. In this study, we explore whether fisheries acoustic data, recorded opportunistically during the English component of the North Sea International Bottom Trawl Survey, can contribute to an improved understanding of mackerel distribution and provide supplementary data to existing dedicated monitoring surveys. Using a previously published multifrequency acoustic mackerel detection algorithm, we extracted the distribution and abundance of schooling mackerel for the whole of the North Sea during August and September between 2007 and 2013. The spatio-temporal coverage of this unique dataset is of particular interest because it includes part of the unsurveyed summer mackerel feeding grounds in the northern North Sea. Recent increases in landings in Icelandic waters during this season suggested that changes have occurred in the mackerel feeding distribution. Thus far it is poorly understood whether these changes are due to a shift, i.e. mackerel moving away from their traditional feeding grounds in the northern North Sea and southern Norwegian Sea, or whether the species’distribution has expanded. We therefore explored whether acoustically derived biomass of schooling mackerel declined in the northern North Sea during the study period, which would suggest a shift in mackerel distribution rather than an expansion. The results of this study show that in the North Sea, schooling mackerel abundance has increased and that its distribution in this area has not changed over this period. Both of these findings provide, to our knowledge, the first evidence in support of the hypothesis that mackerel have expanded their distribution rather than moved away. Article in Journal/Newspaper Northeast Atlantic Norwegian Sea Wageningen UR (University & Research Centre): Digital Library Norwegian Sea ICES Journal of Marine Science 73 4 1115 1126 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
North sea fisheries acoustics mackerel scomber scombrus |
spellingShingle |
North sea fisheries acoustics mackerel scomber scombrus vander Kooij, Jeroen Fassler, S.M.M. Stephens, D. Readdy, Lisa Scott, B. Roel, Beatriz Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
topic_facet |
North sea fisheries acoustics mackerel scomber scombrus |
description |
Fisheries independent monitoring of widely distributed pelagic fish species which conduct large seasonal migrations is logistically complex and expensive.One of the commercially most important examples of such a species in the Northeast Atlantic Ocean is mackerel for which up to recently only an international triennial egg survey contributed to the stock assessment. In this study, we explore whether fisheries acoustic data, recorded opportunistically during the English component of the North Sea International Bottom Trawl Survey, can contribute to an improved understanding of mackerel distribution and provide supplementary data to existing dedicated monitoring surveys. Using a previously published multifrequency acoustic mackerel detection algorithm, we extracted the distribution and abundance of schooling mackerel for the whole of the North Sea during August and September between 2007 and 2013. The spatio-temporal coverage of this unique dataset is of particular interest because it includes part of the unsurveyed summer mackerel feeding grounds in the northern North Sea. Recent increases in landings in Icelandic waters during this season suggested that changes have occurred in the mackerel feeding distribution. Thus far it is poorly understood whether these changes are due to a shift, i.e. mackerel moving away from their traditional feeding grounds in the northern North Sea and southern Norwegian Sea, or whether the species’distribution has expanded. We therefore explored whether acoustically derived biomass of schooling mackerel declined in the northern North Sea during the study period, which would suggest a shift in mackerel distribution rather than an expansion. The results of this study show that in the North Sea, schooling mackerel abundance has increased and that its distribution in this area has not changed over this period. Both of these findings provide, to our knowledge, the first evidence in support of the hypothesis that mackerel have expanded their distribution rather than moved away. |
format |
Article in Journal/Newspaper |
author |
vander Kooij, Jeroen Fassler, S.M.M. Stephens, D. Readdy, Lisa Scott, B. Roel, Beatriz |
author_facet |
vander Kooij, Jeroen Fassler, S.M.M. Stephens, D. Readdy, Lisa Scott, B. Roel, Beatriz |
author_sort |
vander Kooij, Jeroen |
title |
Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
title_short |
Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
title_full |
Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
title_fullStr |
Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
title_full_unstemmed |
Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory |
title_sort |
opportunistically recorded acoustic data support northeast atlantic mackerel expansion theory |
publishDate |
2016 |
url |
https://research.wur.nl/en/publications/opportunistically-recorded-acoustic-data-support-northeast-atlant https://doi.org/10.1093/icesjms/fsv243 |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Northeast Atlantic Norwegian Sea |
genre_facet |
Northeast Atlantic Norwegian Sea |
op_source |
ICES Journal of Marine Science 73 (2016) 4 ISSN: 1054-3139 |
op_relation |
https://edepot.wur.nl/373022 https://research.wur.nl/en/publications/opportunistically-recorded-acoustic-data-support-northeast-atlant doi:10.1093/icesjms/fsv243 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1093/icesjms/fsv243 |
container_title |
ICES Journal of Marine Science |
container_volume |
73 |
container_issue |
4 |
container_start_page |
1115 |
op_container_end_page |
1126 |
_version_ |
1789970359508795392 |