Size selection of Antarctic krill (Euphausia superba) in trawls
Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl's ability to catch different sizes of a harvested entity, and this information is...
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ftdtupubl:oai:pure.atira.dk:publications/14529d58-8635-4094-9caa-48c0a3f73729 2024-06-23T07:46:00+00:00 Size selection of Antarctic krill (Euphausia superba) in trawls Krag, Ludvig Ahm Herrmann, Bent Iversen, Svein A. Engas, Arill Nordrum, Sigve Krafft, Bjorn A. 2014 application/pdf https://orbit.dtu.dk/en/publications/14529d58-8635-4094-9caa-48c0a3f73729 https://doi.org/10.1371/journal.pone.0102168 https://backend.orbit.dtu.dk/ws/files/101971948/Publishers_version.pdf eng eng https://orbit.dtu.dk/en/publications/14529d58-8635-4094-9caa-48c0a3f73729 info:eu-repo/semantics/openAccess Krag , L A , Herrmann , B , Iversen , S A , Engas , A , Nordrum , S & Krafft , B A 2014 , ' Size selection of Antarctic krill (Euphausia superba) in trawls ' , PLOS ONE , vol. 9 , no. 8 , e102168 . https://doi.org/10.1371/journal.pone.0102168 MULTIDISCIPLINARY COD article 2014 ftdtupubl https://doi.org/10.1371/journal.pone.0102168 2024-06-04T15:10:52Z Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl's ability to catch different sizes of a harvested entity, and this information is crucial for the management of a sustainable fishery. We established a morphological description of krill and used it in a mathematical model (FISHSELECT) to predict the selective potential of diamond meshes measuring 5-40 mm with mesh opening angles (oa) ranging from 10 to 90 degrees. We expected the majority of krill to encounter the trawl netting in random orientations due to high towing speeds and the assumed swimming capabilities of krill. However, our results indicated that size selectivity of krill is a well-defined process in which individuals encounter meshes at an optimal orientation for escapement. The simulation-based results were supported by data from experimental trawl hauls and underwater video images of the mesh geometry during fishing. Herein we present predictions for the size selectivity of a range of netting configurations relevant to the krill fishery. The methods developed and results described are important tools for selecting optimal trawl designs for krill fishing. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Technical University of Denmark: DTU Orbit Antarctic The Antarctic PLoS ONE 9 8 e102168 |
institution |
Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
MULTIDISCIPLINARY COD |
spellingShingle |
MULTIDISCIPLINARY COD Krag, Ludvig Ahm Herrmann, Bent Iversen, Svein A. Engas, Arill Nordrum, Sigve Krafft, Bjorn A. Size selection of Antarctic krill (Euphausia superba) in trawls |
topic_facet |
MULTIDISCIPLINARY COD |
description |
Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl's ability to catch different sizes of a harvested entity, and this information is crucial for the management of a sustainable fishery. We established a morphological description of krill and used it in a mathematical model (FISHSELECT) to predict the selective potential of diamond meshes measuring 5-40 mm with mesh opening angles (oa) ranging from 10 to 90 degrees. We expected the majority of krill to encounter the trawl netting in random orientations due to high towing speeds and the assumed swimming capabilities of krill. However, our results indicated that size selectivity of krill is a well-defined process in which individuals encounter meshes at an optimal orientation for escapement. The simulation-based results were supported by data from experimental trawl hauls and underwater video images of the mesh geometry during fishing. Herein we present predictions for the size selectivity of a range of netting configurations relevant to the krill fishery. The methods developed and results described are important tools for selecting optimal trawl designs for krill fishing. |
format |
Article in Journal/Newspaper |
author |
Krag, Ludvig Ahm Herrmann, Bent Iversen, Svein A. Engas, Arill Nordrum, Sigve Krafft, Bjorn A. |
author_facet |
Krag, Ludvig Ahm Herrmann, Bent Iversen, Svein A. Engas, Arill Nordrum, Sigve Krafft, Bjorn A. |
author_sort |
Krag, Ludvig Ahm |
title |
Size selection of Antarctic krill (Euphausia superba) in trawls |
title_short |
Size selection of Antarctic krill (Euphausia superba) in trawls |
title_full |
Size selection of Antarctic krill (Euphausia superba) in trawls |
title_fullStr |
Size selection of Antarctic krill (Euphausia superba) in trawls |
title_full_unstemmed |
Size selection of Antarctic krill (Euphausia superba) in trawls |
title_sort |
size selection of antarctic krill (euphausia superba) in trawls |
publishDate |
2014 |
url |
https://orbit.dtu.dk/en/publications/14529d58-8635-4094-9caa-48c0a3f73729 https://doi.org/10.1371/journal.pone.0102168 https://backend.orbit.dtu.dk/ws/files/101971948/Publishers_version.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_source |
Krag , L A , Herrmann , B , Iversen , S A , Engas , A , Nordrum , S & Krafft , B A 2014 , ' Size selection of Antarctic krill (Euphausia superba) in trawls ' , PLOS ONE , vol. 9 , no. 8 , e102168 . https://doi.org/10.1371/journal.pone.0102168 |
op_relation |
https://orbit.dtu.dk/en/publications/14529d58-8635-4094-9caa-48c0a3f73729 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0102168 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
8 |
container_start_page |
e102168 |
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1802643445335982080 |