Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity
Antarctic krill (Euphausia superba) are high latitude pelagic organisms which play a key ecological role in the ecosystem of the Southern Ocean. To synchronize their daily and seasonal life-traits with their highly rhythmic environment, krill rely on the implementation of rhythmic strategies which m...
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Springer Nature
2020
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ftawi:oai:epic.awi.de:53350 2024-09-15T17:47:05+00:00 Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity Piccolin, Fabio Pitzschler, Lisa Biscontin, Alberto Teschke, Mathias Meyer, Bettina 2020-09-21 application/pdf https://epic.awi.de/id/eprint/53350/ https://epic.awi.de/id/eprint/53350/1/Piccolinetal2020.pdf https://doi.org/10.1038/s41598-020-73823-5 https://hdl.handle.net/10013/epic.6f3e1544-56aa-45de-a9c5-d5b067763094 unknown Springer Nature https://epic.awi.de/id/eprint/53350/1/Piccolinetal2020.pdf Piccolin, F. , Pitzschler, L. , Biscontin, A. , Teschke, M. and Meyer, B. orcid:0000-0001-6804-9896 (2020) Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity , Scientific Reports . hdl:10013/epic.6f3e1544-56aa-45de-a9c5-d5b067763094 EPIC3Scientific Reports, Springer Nature Article isiRev 2020 ftawi https://doi.org/10.1038/s41598-020-73823-5 2024-06-24T04:26:11Z Antarctic krill (Euphausia superba) are high latitude pelagic organisms which play a key ecological role in the ecosystem of the Southern Ocean. To synchronize their daily and seasonal life-traits with their highly rhythmic environment, krill rely on the implementation of rhythmic strategies which might be regulated by a circadian clock. A recent analysis of krill circadian transcriptome revealed that their clock might be characterized by an endogenous free-running period of about 12–15 h. Using krill exposed to simulated light/dark cycles (LD) and constant darkness (DD), we investigated the circadian regulation of krill diel vertical migration (DVM) and oxygen consumption, together with daily patterns of clock gene expression in brain and eyestalk tissue. In LD, we found clear 24 h rhythms of DVM and oxygen consumption, suggesting a synchronization with photoperiod. In DD, the DVM rhythm shifted to a 12 h period, while the peak of oxygen consumption displayed a temporal advance during the subjective light phase. This suggested that in free-running conditions the periodicity of these clock-regulated output functions might reflect the shortening of the endogenous period observed at the transcriptional level. Moreover, differences in the expression patterns of clock gene in brain and eyestalk, in LD and DD, suggested the presence in krill of a multiple oscillator system. Evidence of short periodicities in krill behavior and physiology further supports the hypothesis that a short endogenous period might represent a circadian adaption to cope with extreme seasonal photoperiodic variability at high latitude. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Scientific Reports 10 1 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Antarctic krill (Euphausia superba) are high latitude pelagic organisms which play a key ecological role in the ecosystem of the Southern Ocean. To synchronize their daily and seasonal life-traits with their highly rhythmic environment, krill rely on the implementation of rhythmic strategies which might be regulated by a circadian clock. A recent analysis of krill circadian transcriptome revealed that their clock might be characterized by an endogenous free-running period of about 12–15 h. Using krill exposed to simulated light/dark cycles (LD) and constant darkness (DD), we investigated the circadian regulation of krill diel vertical migration (DVM) and oxygen consumption, together with daily patterns of clock gene expression in brain and eyestalk tissue. In LD, we found clear 24 h rhythms of DVM and oxygen consumption, suggesting a synchronization with photoperiod. In DD, the DVM rhythm shifted to a 12 h period, while the peak of oxygen consumption displayed a temporal advance during the subjective light phase. This suggested that in free-running conditions the periodicity of these clock-regulated output functions might reflect the shortening of the endogenous period observed at the transcriptional level. Moreover, differences in the expression patterns of clock gene in brain and eyestalk, in LD and DD, suggested the presence in krill of a multiple oscillator system. Evidence of short periodicities in krill behavior and physiology further supports the hypothesis that a short endogenous period might represent a circadian adaption to cope with extreme seasonal photoperiodic variability at high latitude. |
format |
Article in Journal/Newspaper |
author |
Piccolin, Fabio Pitzschler, Lisa Biscontin, Alberto Teschke, Mathias Meyer, Bettina |
spellingShingle |
Piccolin, Fabio Pitzschler, Lisa Biscontin, Alberto Teschke, Mathias Meyer, Bettina Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
author_facet |
Piccolin, Fabio Pitzschler, Lisa Biscontin, Alberto Teschke, Mathias Meyer, Bettina |
author_sort |
Piccolin, Fabio |
title |
Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
title_short |
Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
title_full |
Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
title_fullStr |
Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
title_full_unstemmed |
Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity |
title_sort |
circadian regulation of diel vertical migration (dvm) in antarctic krill (euphausia superba) and its link with photoperiod and circadian clock activity |
publisher |
Springer Nature |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/53350/ https://epic.awi.de/id/eprint/53350/1/Piccolinetal2020.pdf https://doi.org/10.1038/s41598-020-73823-5 https://hdl.handle.net/10013/epic.6f3e1544-56aa-45de-a9c5-d5b067763094 |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_source |
EPIC3Scientific Reports, Springer Nature |
op_relation |
https://epic.awi.de/id/eprint/53350/1/Piccolinetal2020.pdf Piccolin, F. , Pitzschler, L. , Biscontin, A. , Teschke, M. and Meyer, B. orcid:0000-0001-6804-9896 (2020) Circadian regulation of diel vertical migration (DVM) in Antarctic krill (Euphausia superba) and its link with photoperiod and circadian clock activity , Scientific Reports . hdl:10013/epic.6f3e1544-56aa-45de-a9c5-d5b067763094 |
op_doi |
https://doi.org/10.1038/s41598-020-73823-5 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
_version_ |
1810495691808571392 |