Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig
For the development of efficient trawls to minimize catch loss, escape mortality and potential negative ecosystem impacts from the fishery, the understanding about trawl selectivity processes are crucial. Small crustaceans are regarded as being less motile than most fish species. Crustaceans also di...
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Online Access: | http://hdl.handle.net/11250/2560340 https://doi.org/10.1371/journal.pone.0202027 |
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ftimr:oai:imr.brage.unit.no:11250/2560340 2023-05-15T13:44:00+02:00 Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig Krag, Ludvig Ahm Krafft, Bjørn Arne Engås, Arill Herrmann, Bent 2018 application/pdf http://hdl.handle.net/11250/2560340 https://doi.org/10.1371/journal.pone.0202027 eng eng Norges forskningsråd: 243619, 222798 PLoS ONE. 2018, 13 1-12. urn:issn:1932-6203 http://hdl.handle.net/11250/2560340 https://doi. org/10.1371/journal.pone.0202027 cristin:1601983 1-12 13 PLoS ONE Peer reviewed Journal article 2018 ftimr https://doi.org/10.1371/journal.pone.0202027 2021-09-23T20:15:33Z For the development of efficient trawls to minimize catch loss, escape mortality and potential negative ecosystem impacts from the fishery, the understanding about trawl selectivity processes are crucial. Small crustaceans are regarded as being less motile than most fish species. Crustaceans also display low levels of active avoidance from trawl netting, which in turn may cause direct contact with netting on multiple occasions on their passage towards the codend increasing the probability for escapement. Full-scaled experiments to estimate gear selectivity are highly resource demanding and are highly technically challenging for several types of fisheries. In this study, we developed and tested a trawl-independent towed-rig construction designed to investigate size selectivity of Antarctic krill (Euphausia superba). The results indicate that valid selectivity estimates can be obtained using this method, but due to the small sample size, results are inconclusive. However, the findings of the current study show a potential for developing easier and more cost-effective ways of investigating and estimating size selectivity of Antarctic krill and other small crustacean species in trawls. Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Institute for Marine Research: Brage IMR Antarctic PLOS ONE 13 8 e0202027 |
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Institute for Marine Research: Brage IMR |
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English |
description |
For the development of efficient trawls to minimize catch loss, escape mortality and potential negative ecosystem impacts from the fishery, the understanding about trawl selectivity processes are crucial. Small crustaceans are regarded as being less motile than most fish species. Crustaceans also display low levels of active avoidance from trawl netting, which in turn may cause direct contact with netting on multiple occasions on their passage towards the codend increasing the probability for escapement. Full-scaled experiments to estimate gear selectivity are highly resource demanding and are highly technically challenging for several types of fisheries. In this study, we developed and tested a trawl-independent towed-rig construction designed to investigate size selectivity of Antarctic krill (Euphausia superba). The results indicate that valid selectivity estimates can be obtained using this method, but due to the small sample size, results are inconclusive. However, the findings of the current study show a potential for developing easier and more cost-effective ways of investigating and estimating size selectivity of Antarctic krill and other small crustacean species in trawls. Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig publishedVersion |
format |
Article in Journal/Newspaper |
author |
Krag, Ludvig Ahm Krafft, Bjørn Arne Engås, Arill Herrmann, Bent |
spellingShingle |
Krag, Ludvig Ahm Krafft, Bjørn Arne Engås, Arill Herrmann, Bent Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
author_facet |
Krag, Ludvig Ahm Krafft, Bjørn Arne Engås, Arill Herrmann, Bent |
author_sort |
Krag, Ludvig Ahm |
title |
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
title_short |
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
title_full |
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
title_fullStr |
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
title_full_unstemmed |
Collecting size-selectivity data for Antarctic krill (Euphausia superba) with a trawl independent towing rig |
title_sort |
collecting size-selectivity data for antarctic krill (euphausia superba) with a trawl independent towing rig |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2560340 https://doi.org/10.1371/journal.pone.0202027 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_source |
1-12 13 PLoS ONE |
op_relation |
Norges forskningsråd: 243619, 222798 PLoS ONE. 2018, 13 1-12. urn:issn:1932-6203 http://hdl.handle.net/11250/2560340 https://doi. org/10.1371/journal.pone.0202027 cristin:1601983 |
op_doi |
https://doi.org/10.1371/journal.pone.0202027 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
8 |
container_start_page |
e0202027 |
_version_ |
1766195809979727872 |