Fish welfare based classification method of ocean current speeds at aquaculture sites
A major trend in marine aquaculture is to move production to more exposed sites with occasionally rough ocean current events. However, it is unclear whether fish will thrive in these extreme environments, since thorough descriptions of ambient current conditions with regards to fish welfare is lacki...
Published in: | Aquaculture Environment Interactions |
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Online Access: | http://hdl.handle.net/11250/2636770 https://doi.org/10.3354/aei00310 |
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ftimr:oai:imr.brage.unit.no:11250/2636770 2023-05-15T15:29:29+02:00 Fish welfare based classification method of ocean current speeds at aquaculture sites Jónsdóttir, Kristbjörg Edda Hvas, Malthe Alfredsen, Jo Arve Føre, Martin Alver, Morten Bjelland, Hans Vanhauwaert Oppedal, Frode 2019 application/pdf http://hdl.handle.net/11250/2636770 https://doi.org/10.3354/aei00310 eng eng Aquaculture Environment Interactions. 2019, 11 249-261. urn:issn:1869-215X http://hdl.handle.net/11250/2636770 http://dx.doi.org/10.3354/aei00310 cristin:1707324 249-261 11 Aquaculture Environment Interactions Journal article Peer reviewed 2019 ftimr https://doi.org/10.3354/aei00310 2021-09-23T20:15:57Z A major trend in marine aquaculture is to move production to more exposed sites with occasionally rough ocean current events. However, it is unclear whether fish will thrive in these extreme environments, since thorough descriptions of ambient current conditions with regards to fish welfare is lacking. In the present study, ocean current data were collected using acoustic Doppler current profilers at 5 exposed sites along the Norwegian coast over minimum periods of 5 mo. To evaluate welfare risks, current data was compared to known limits of swimming capabilities, such as onset of behavioural changes and critical swimming speeds (Ucrit), of Atlantic salmon Salmo salar and lumpfish Cyclopterus lumpus. Specifically, at each site, current speeds were classified into 6 categories based on expected impact on swimming behaviours of Atlantic salmon, and duration of currents within each category were inspected using a homogeneous and non-homogeneous criterion for the water column. Current speeds were then compared with projected Ucrit at relevant temperatures and fish sizes of Atlantic salmon and lumpfish. Furthermore, a detailed characterization of extreme events at the most exposed site was performed. Of the 5 locations, only 1 exceeded the Ucrit of Atlantic salmon, while all sites featured currents above Ucrit of lumpfish for up to 33 h at a time. These results suggest that responsible Atlantic salmon farming is possible at sites considered exposed, while lumpfish should be restricted to more sheltered environments. The presented method can be applied for other aquaculture fish species if adequate data are available publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR Aquaculture Environment Interactions 11 249 261 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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language |
English |
description |
A major trend in marine aquaculture is to move production to more exposed sites with occasionally rough ocean current events. However, it is unclear whether fish will thrive in these extreme environments, since thorough descriptions of ambient current conditions with regards to fish welfare is lacking. In the present study, ocean current data were collected using acoustic Doppler current profilers at 5 exposed sites along the Norwegian coast over minimum periods of 5 mo. To evaluate welfare risks, current data was compared to known limits of swimming capabilities, such as onset of behavioural changes and critical swimming speeds (Ucrit), of Atlantic salmon Salmo salar and lumpfish Cyclopterus lumpus. Specifically, at each site, current speeds were classified into 6 categories based on expected impact on swimming behaviours of Atlantic salmon, and duration of currents within each category were inspected using a homogeneous and non-homogeneous criterion for the water column. Current speeds were then compared with projected Ucrit at relevant temperatures and fish sizes of Atlantic salmon and lumpfish. Furthermore, a detailed characterization of extreme events at the most exposed site was performed. Of the 5 locations, only 1 exceeded the Ucrit of Atlantic salmon, while all sites featured currents above Ucrit of lumpfish for up to 33 h at a time. These results suggest that responsible Atlantic salmon farming is possible at sites considered exposed, while lumpfish should be restricted to more sheltered environments. The presented method can be applied for other aquaculture fish species if adequate data are available publishedVersion |
format |
Article in Journal/Newspaper |
author |
Jónsdóttir, Kristbjörg Edda Hvas, Malthe Alfredsen, Jo Arve Føre, Martin Alver, Morten Bjelland, Hans Vanhauwaert Oppedal, Frode |
spellingShingle |
Jónsdóttir, Kristbjörg Edda Hvas, Malthe Alfredsen, Jo Arve Føre, Martin Alver, Morten Bjelland, Hans Vanhauwaert Oppedal, Frode Fish welfare based classification method of ocean current speeds at aquaculture sites |
author_facet |
Jónsdóttir, Kristbjörg Edda Hvas, Malthe Alfredsen, Jo Arve Føre, Martin Alver, Morten Bjelland, Hans Vanhauwaert Oppedal, Frode |
author_sort |
Jónsdóttir, Kristbjörg Edda |
title |
Fish welfare based classification method of ocean current speeds at aquaculture sites |
title_short |
Fish welfare based classification method of ocean current speeds at aquaculture sites |
title_full |
Fish welfare based classification method of ocean current speeds at aquaculture sites |
title_fullStr |
Fish welfare based classification method of ocean current speeds at aquaculture sites |
title_full_unstemmed |
Fish welfare based classification method of ocean current speeds at aquaculture sites |
title_sort |
fish welfare based classification method of ocean current speeds at aquaculture sites |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2636770 https://doi.org/10.3354/aei00310 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
249-261 11 Aquaculture Environment Interactions |
op_relation |
Aquaculture Environment Interactions. 2019, 11 249-261. urn:issn:1869-215X http://hdl.handle.net/11250/2636770 http://dx.doi.org/10.3354/aei00310 cristin:1707324 |
op_doi |
https://doi.org/10.3354/aei00310 |
container_title |
Aquaculture Environment Interactions |
container_volume |
11 |
container_start_page |
249 |
op_container_end_page |
261 |
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1766359898224852992 |