The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus
In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January 2017 to July 2018. One group was reared under simulated natural photoperiod (LDN, control group) for Tromsø (70°N). The second group was tra...
Published in: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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Online Access: | http://hdl.handle.net/11250/2637664 https://doi.org/10.1016/j.cbpa.2018.11.004 |
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ftimr:oai:imr.brage.unit.no:11250/2637664 2023-05-15T18:34:45+02:00 The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus Imsland, Albert Hangstad, Thor Arne Jonassen, Thor Magne Stefansson, Sigurd Olav Nilsen, Tom Ole Hovgaard, Peter Elvegård, Tor Anders Lindberg, Ken Ståle Mikalsen, Bjørn Urskog, Tonje Cecilie Norberg, Birgitta Andersson, Eva Spetland, Frank Reynolds, Patrick 2019 application/vnd.openxmlformats-officedocument.wordprocessingml.document http://hdl.handle.net/11250/2637664 https://doi.org/10.1016/j.cbpa.2018.11.004 eng eng Norges forskningsråd: 256199 Comparative Biochemistry and Physiology A. 2019, 228 62-70. urn:issn:1095-6433 http://hdl.handle.net/11250/2637664 https://doi.org/10.1016/j.cbpa.2018.11.004 cristin:1692614 62-70 228 Comparative Biochemistry and Physiology A Journal article Peer reviewed 2019 ftimr https://doi.org/10.1016/j.cbpa.2018.11.004 2021-09-23T20:14:49Z In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January 2017 to July 2018. One group was reared under simulated natural photoperiod (LDN, control group) for Tromsø (70°N). The second group was transferred to continuous light (LD240) on 30 January 2017 and reared at LD24:0 throughout the trial period. Two compressed and phase advanced photoperiods were also established. Both groups were moved from LDN to LD24:0 on 30 January 2017, and after that reared at compressed natural photoperiods where the annual photoperiod was compressed down to six months (L6) or nine months (L9) for the duration of the study. Spawning time was shifted in both compressed groups during both years of the study. Spawning activity in the second year of the study was higher and followed more closely the expected spawning period in the compressed and the LDN groups. Spawning in the LD240 group was spread out over the experimental period with no distinct peak in spawning. A seasonal and pronounced drop in condition factor was found for females in the L9, L6 and the LDN groups. This post-spawning loss in condition was closely related to the spawning activity of each group. The current findings suggest that photoperiod has a strong influence on the timing of lumpfish maturation and can be used as an efficient and inexpensive tool to secure lumpfish reproduction operations i.e. year-round supply of egg and milt and/or timing with optimal temperature regimes. submittedVersion Article in Journal/Newspaper Tromsø Institute for Marine Research: Brage IMR Tromsø Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 228 62 70 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January 2017 to July 2018. One group was reared under simulated natural photoperiod (LDN, control group) for Tromsø (70°N). The second group was transferred to continuous light (LD240) on 30 January 2017 and reared at LD24:0 throughout the trial period. Two compressed and phase advanced photoperiods were also established. Both groups were moved from LDN to LD24:0 on 30 January 2017, and after that reared at compressed natural photoperiods where the annual photoperiod was compressed down to six months (L6) or nine months (L9) for the duration of the study. Spawning time was shifted in both compressed groups during both years of the study. Spawning activity in the second year of the study was higher and followed more closely the expected spawning period in the compressed and the LDN groups. Spawning in the LD240 group was spread out over the experimental period with no distinct peak in spawning. A seasonal and pronounced drop in condition factor was found for females in the L9, L6 and the LDN groups. This post-spawning loss in condition was closely related to the spawning activity of each group. The current findings suggest that photoperiod has a strong influence on the timing of lumpfish maturation and can be used as an efficient and inexpensive tool to secure lumpfish reproduction operations i.e. year-round supply of egg and milt and/or timing with optimal temperature regimes. submittedVersion |
format |
Article in Journal/Newspaper |
author |
Imsland, Albert Hangstad, Thor Arne Jonassen, Thor Magne Stefansson, Sigurd Olav Nilsen, Tom Ole Hovgaard, Peter Elvegård, Tor Anders Lindberg, Ken Ståle Mikalsen, Bjørn Urskog, Tonje Cecilie Norberg, Birgitta Andersson, Eva Spetland, Frank Reynolds, Patrick |
spellingShingle |
Imsland, Albert Hangstad, Thor Arne Jonassen, Thor Magne Stefansson, Sigurd Olav Nilsen, Tom Ole Hovgaard, Peter Elvegård, Tor Anders Lindberg, Ken Ståle Mikalsen, Bjørn Urskog, Tonje Cecilie Norberg, Birgitta Andersson, Eva Spetland, Frank Reynolds, Patrick The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
author_facet |
Imsland, Albert Hangstad, Thor Arne Jonassen, Thor Magne Stefansson, Sigurd Olav Nilsen, Tom Ole Hovgaard, Peter Elvegård, Tor Anders Lindberg, Ken Ståle Mikalsen, Bjørn Urskog, Tonje Cecilie Norberg, Birgitta Andersson, Eva Spetland, Frank Reynolds, Patrick |
author_sort |
Imsland, Albert |
title |
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
title_short |
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
title_full |
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
title_fullStr |
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
title_full_unstemmed |
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus |
title_sort |
use of photoperiods to provide year round spawning in lumpfish cyclopterus lumpus |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2637664 https://doi.org/10.1016/j.cbpa.2018.11.004 |
geographic |
Tromsø |
geographic_facet |
Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_source |
62-70 228 Comparative Biochemistry and Physiology A |
op_relation |
Norges forskningsråd: 256199 Comparative Biochemistry and Physiology A. 2019, 228 62-70. urn:issn:1095-6433 http://hdl.handle.net/11250/2637664 https://doi.org/10.1016/j.cbpa.2018.11.004 cristin:1692614 |
op_doi |
https://doi.org/10.1016/j.cbpa.2018.11.004 |
container_title |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
container_volume |
228 |
container_start_page |
62 |
op_container_end_page |
70 |
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1766219657329508352 |