Size-based indicators show depth-dependent change over time in the deep sea
Size-based indicators are well established as a management tool in shelf seas as they respond to changes in fishing pressure and describe important aspects of community function. In the deep sea, however, vital rates are much slower and body size relationships vary with depth, making it less clear h...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Academic Press Ltd Elsevier Science Ltd
2017
|
Subjects: | |
Online Access: | https://doi.org/10.1093/icesjms/fsx110 http://ecite.utas.edu.au/120917 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:120917 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:120917 2023-05-15T17:34:59+02:00 Size-based indicators show depth-dependent change over time in the deep sea Mindel, BL Neat, FC Webb, TJ Blanchard, JL 2017 application/pdf https://doi.org/10.1093/icesjms/fsx110 http://ecite.utas.edu.au/120917 en eng Academic Press Ltd Elsevier Science Ltd http://ecite.utas.edu.au/120917/2/120917 final.pdf http://ecite.utas.edu.au/120917/1/document(3).pdf http://dx.doi.org/10.1093/icesjms/fsx110 Mindel, BL and Neat, FC and Webb, TJ and Blanchard, JL, Size-based indicators show depth-dependent change over time in the deep sea, ICES Journal of Marine Science, 75, (1) pp. 113-121. ISSN 1054-3139 (2017) [Refereed Article] http://ecite.utas.edu.au/120917 Biological Sciences Ecology Community ecology (excl. invasive species ecology) Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1093/icesjms/fsx110 2022-07-04T22:16:47Z Size-based indicators are well established as a management tool in shelf seas as they respond to changes in fishing pressure and describe important aspects of community function. In the deep sea, however, vital rates are much slower and body size relationships vary with depth, making it less clear how size-based indicators can be applied and whether they are appropriate for detecting changes through time. The deep-sea fish stocks of the North Atlantic underwent a period of exploitation followed by management and conservation action that relieved this pressure. We used data from a deep-water bottom trawl survey in the Rockall Trough, at depths of 3002000 m, to test whether size-based indicators changed over a 16-year period, during which fishing pressure decreased. We applied four indicators to these data: mean body length, mean maximum length, large fish indicator (LFI), and the slope of the biomass spectrum. Patterns were analysed within four different depth bands. The LFI and slope of the biomass spectrum showed positive change over time, suggesting recovery from fishing pressure. This response was generally most apparent in the shallowest depth band, where most fishing activity has been distributed. Values of the LFI were much higher overall than in shelf seas, so the same reference points cannot be applied to all marine ecosystems. These findings imply that size-based indicators can be usefully applied to the deep sea and that they potentially track changes in fishing pressure in the medium term. Article in Journal/Newspaper North Atlantic eCite UTAS (University of Tasmania) Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) ICES Journal of Marine Science 75 1 113 121 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Community ecology (excl. invasive species ecology) |
spellingShingle |
Biological Sciences Ecology Community ecology (excl. invasive species ecology) Mindel, BL Neat, FC Webb, TJ Blanchard, JL Size-based indicators show depth-dependent change over time in the deep sea |
topic_facet |
Biological Sciences Ecology Community ecology (excl. invasive species ecology) |
description |
Size-based indicators are well established as a management tool in shelf seas as they respond to changes in fishing pressure and describe important aspects of community function. In the deep sea, however, vital rates are much slower and body size relationships vary with depth, making it less clear how size-based indicators can be applied and whether they are appropriate for detecting changes through time. The deep-sea fish stocks of the North Atlantic underwent a period of exploitation followed by management and conservation action that relieved this pressure. We used data from a deep-water bottom trawl survey in the Rockall Trough, at depths of 3002000 m, to test whether size-based indicators changed over a 16-year period, during which fishing pressure decreased. We applied four indicators to these data: mean body length, mean maximum length, large fish indicator (LFI), and the slope of the biomass spectrum. Patterns were analysed within four different depth bands. The LFI and slope of the biomass spectrum showed positive change over time, suggesting recovery from fishing pressure. This response was generally most apparent in the shallowest depth band, where most fishing activity has been distributed. Values of the LFI were much higher overall than in shelf seas, so the same reference points cannot be applied to all marine ecosystems. These findings imply that size-based indicators can be usefully applied to the deep sea and that they potentially track changes in fishing pressure in the medium term. |
format |
Article in Journal/Newspaper |
author |
Mindel, BL Neat, FC Webb, TJ Blanchard, JL |
author_facet |
Mindel, BL Neat, FC Webb, TJ Blanchard, JL |
author_sort |
Mindel, BL |
title |
Size-based indicators show depth-dependent change over time in the deep sea |
title_short |
Size-based indicators show depth-dependent change over time in the deep sea |
title_full |
Size-based indicators show depth-dependent change over time in the deep sea |
title_fullStr |
Size-based indicators show depth-dependent change over time in the deep sea |
title_full_unstemmed |
Size-based indicators show depth-dependent change over time in the deep sea |
title_sort |
size-based indicators show depth-dependent change over time in the deep sea |
publisher |
Academic Press Ltd Elsevier Science Ltd |
publishDate |
2017 |
url |
https://doi.org/10.1093/icesjms/fsx110 http://ecite.utas.edu.au/120917 |
long_lat |
ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Rockall Trough |
geographic_facet |
Rockall Trough |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://ecite.utas.edu.au/120917/2/120917 final.pdf http://ecite.utas.edu.au/120917/1/document(3).pdf http://dx.doi.org/10.1093/icesjms/fsx110 Mindel, BL and Neat, FC and Webb, TJ and Blanchard, JL, Size-based indicators show depth-dependent change over time in the deep sea, ICES Journal of Marine Science, 75, (1) pp. 113-121. ISSN 1054-3139 (2017) [Refereed Article] http://ecite.utas.edu.au/120917 |
op_doi |
https://doi.org/10.1093/icesjms/fsx110 |
container_title |
ICES Journal of Marine Science |
container_volume |
75 |
container_issue |
1 |
container_start_page |
113 |
op_container_end_page |
121 |
_version_ |
1766133989215567872 |