Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages
- Atlantic salmon in marine farming environments are exposed to potentially detrimental conditions through space and time. For instance, the vertical distribution of parasitic salmon lice larvae shifts in response to changing salinity conditions. We examined whether stock can be moved away from harm...
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Online Access: | http://hdl.handle.net/11250/2374379 https://doi.org/10.3354/aei00136 |
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ftimr:oai:imr.brage.unit.no:11250/2374379 2024-09-09T19:30:34+00:00 Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages Wright, Daniel William Glaropoulos, Alexis Solstorm, David Stien, Lars Helge Oppedal, Frode 2015-12-11T09:59:23Z application/pdf http://hdl.handle.net/11250/2374379 https://doi.org/10.3354/aei00136 eng eng Inter-Research Wright DW, Glaropoulos A, Solstorm D, Stien LH, Oppedal F (2015) Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages. Aquacult Environ Interact 7:61-65 urn:issn:1869-7534 http://hdl.handle.net/11250/2374379 https://doi.org/10.3354/aei00136 cristin:1295145 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ 61-65 7 Aquaculture environment interactions VDP::Landbruks- og fiskerifag: 900::Fiskerifag: 920::Akvakultur: 922 VDP::Agriculture and fisheries science: 900::Fisheries science: 920::Aquaculture: 922 Journal article Peer reviewed 2015 ftimr https://doi.org/10.3354/aei00136 2024-07-31T03:37:25Z - Atlantic salmon in marine farming environments are exposed to potentially detrimental conditions through space and time. For instance, the vertical distribution of parasitic salmon lice larvae shifts in response to changing salinity conditions. We examined whether stock can be moved away from harmful depths using constant-rate vertical movements of lights at night over short periods. Salmon held in research-scale sea cages were exposed to light movements between depths of 0-12 m and at 5 different speeds (1, 2, 4, 8 and 16 m min-1) on 3 nights. Fish were acclimated to lights fixed at 8 m depth in a temperature- and salinity-stratified cage environment, partitioning salmon into surface-positioned (47%) and light-positioned subgroups (53% of the population). A high proportion (50-65%) of the light-positioned group followed lights between upper and lower cage sections when moved up to a critical speed of 4 m min-1. However, the surface-positioned group always persisted. Following decreased when lights were moved at higher speeds, equivalent to or faster than fish swimming speeds measured under fixed lighting. Instantaneous vertical light movements at night may effectively move salmon away from fluctuating unsuitable depths (e.g. lice-rich depths), into temporary favourable depths (e.g. surface brackish waters to treat against stenohaline parasites), and throughout cages to avoid crowding in narrow depth ranges. Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR Aquaculture Environment Interactions 7 1 61 65 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Landbruks- og fiskerifag: 900::Fiskerifag: 920::Akvakultur: 922 VDP::Agriculture and fisheries science: 900::Fisheries science: 920::Aquaculture: 922 |
spellingShingle |
VDP::Landbruks- og fiskerifag: 900::Fiskerifag: 920::Akvakultur: 922 VDP::Agriculture and fisheries science: 900::Fisheries science: 920::Aquaculture: 922 Wright, Daniel William Glaropoulos, Alexis Solstorm, David Stien, Lars Helge Oppedal, Frode Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
topic_facet |
VDP::Landbruks- og fiskerifag: 900::Fiskerifag: 920::Akvakultur: 922 VDP::Agriculture and fisheries science: 900::Fisheries science: 920::Aquaculture: 922 |
description |
- Atlantic salmon in marine farming environments are exposed to potentially detrimental conditions through space and time. For instance, the vertical distribution of parasitic salmon lice larvae shifts in response to changing salinity conditions. We examined whether stock can be moved away from harmful depths using constant-rate vertical movements of lights at night over short periods. Salmon held in research-scale sea cages were exposed to light movements between depths of 0-12 m and at 5 different speeds (1, 2, 4, 8 and 16 m min-1) on 3 nights. Fish were acclimated to lights fixed at 8 m depth in a temperature- and salinity-stratified cage environment, partitioning salmon into surface-positioned (47%) and light-positioned subgroups (53% of the population). A high proportion (50-65%) of the light-positioned group followed lights between upper and lower cage sections when moved up to a critical speed of 4 m min-1. However, the surface-positioned group always persisted. Following decreased when lights were moved at higher speeds, equivalent to or faster than fish swimming speeds measured under fixed lighting. Instantaneous vertical light movements at night may effectively move salmon away from fluctuating unsuitable depths (e.g. lice-rich depths), into temporary favourable depths (e.g. surface brackish waters to treat against stenohaline parasites), and throughout cages to avoid crowding in narrow depth ranges. |
format |
Article in Journal/Newspaper |
author |
Wright, Daniel William Glaropoulos, Alexis Solstorm, David Stien, Lars Helge Oppedal, Frode |
author_facet |
Wright, Daniel William Glaropoulos, Alexis Solstorm, David Stien, Lars Helge Oppedal, Frode |
author_sort |
Wright, Daniel William |
title |
Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
title_short |
Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
title_full |
Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
title_fullStr |
Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
title_full_unstemmed |
Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages |
title_sort |
atlantic salmon salmo salar instantaneously follow vertical light movements in sea cages |
publisher |
Inter-Research |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/2374379 https://doi.org/10.3354/aei00136 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
61-65 7 Aquaculture environment interactions |
op_relation |
Wright DW, Glaropoulos A, Solstorm D, Stien LH, Oppedal F (2015) Atlantic salmon Salmo salar instantaneously follow vertical light movements in sea cages. Aquacult Environ Interact 7:61-65 urn:issn:1869-7534 http://hdl.handle.net/11250/2374379 https://doi.org/10.3354/aei00136 cristin:1295145 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ |
op_doi |
https://doi.org/10.3354/aei00136 |
container_title |
Aquaculture Environment Interactions |
container_volume |
7 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
65 |
_version_ |
1809899552387366912 |