Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts
Shielding skirts are widely used on Atlantic Salmon sea-cages as a non-invasive preventive measure against salmon lice infestations. The skirts are however known to impact the current flow and thereby the environment within the cage. As the current is influenced by local factors such as topography,...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2732683 https://doi.org/10.1016/j.apor.2020.102509 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2732683 2023-05-15T15:32:18+02:00 Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts Jónsdóttir, Kristbjörg Edda Volent, Zsolt Alfredsen, Jo Arve 2020 application/pdf https://hdl.handle.net/11250/2732683 https://doi.org/10.1016/j.apor.2020.102509 eng eng Elsevier urn:issn:0141-1187 https://hdl.handle.net/11250/2732683 https://doi.org/10.1016/j.apor.2020.102509 cristin:1863443 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY Applied Ocean Research Peer reviewed Journal article 2020 ftntnutrondheimi https://doi.org/10.1016/j.apor.2020.102509 2021-03-17T23:34:39Z Shielding skirts are widely used on Atlantic Salmon sea-cages as a non-invasive preventive measure against salmon lice infestations. The skirts are however known to impact the current flow and thereby the environment within the cage. As the current is influenced by local factors such as topography, farm layout and stocking density of the cage, it is difficult to compare results from sites that apply skirts with those without. The same high-stocked cage was therefore studied with and without the skirt deployed, including the transition from shielded to unshielded, to investigate the influence the skirt had on the current flow within the cage and dissolved oxygen. When the skirt was deployed the velocity vector in the centre of the cage had a vertical component towards the surface and the reduction in current speed was higher. The dissolved oxygen level inside the cage improved within 30 minutes when the skirt was removed and there was no indication of the skirt influencing the vertical swimming behaviour of the salmon. publishedVersion Article in Journal/Newspaper Atlantic salmon NTNU Open Archive (Norwegian University of Science and Technology) Applied Ocean Research 108 102509 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Shielding skirts are widely used on Atlantic Salmon sea-cages as a non-invasive preventive measure against salmon lice infestations. The skirts are however known to impact the current flow and thereby the environment within the cage. As the current is influenced by local factors such as topography, farm layout and stocking density of the cage, it is difficult to compare results from sites that apply skirts with those without. The same high-stocked cage was therefore studied with and without the skirt deployed, including the transition from shielded to unshielded, to investigate the influence the skirt had on the current flow within the cage and dissolved oxygen. When the skirt was deployed the velocity vector in the centre of the cage had a vertical component towards the surface and the reduction in current speed was higher. The dissolved oxygen level inside the cage improved within 30 minutes when the skirt was removed and there was no indication of the skirt influencing the vertical swimming behaviour of the salmon. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Jónsdóttir, Kristbjörg Edda Volent, Zsolt Alfredsen, Jo Arve |
spellingShingle |
Jónsdóttir, Kristbjörg Edda Volent, Zsolt Alfredsen, Jo Arve Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
author_facet |
Jónsdóttir, Kristbjörg Edda Volent, Zsolt Alfredsen, Jo Arve |
author_sort |
Jónsdóttir, Kristbjörg Edda |
title |
Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
title_short |
Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
title_full |
Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
title_fullStr |
Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
title_full_unstemmed |
Current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
title_sort |
current flow and dissolved oxygen in a full-scale stocked fish-cage with and without lice shielding skirts |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2732683 https://doi.org/10.1016/j.apor.2020.102509 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Applied Ocean Research |
op_relation |
urn:issn:0141-1187 https://hdl.handle.net/11250/2732683 https://doi.org/10.1016/j.apor.2020.102509 cristin:1863443 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.apor.2020.102509 |
container_title |
Applied Ocean Research |
container_volume |
108 |
container_start_page |
102509 |
_version_ |
1766362817717338112 |