Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea)
An endogenous circadian clock influences metabolic output rhythms in the Antarctic krill (Euphausia superbaDana, 1850), a key species in the Southern Ocean ecosystem. Seasonal changes in photoperiod in Antarctica, ranging from midnight sun (24 h light) during mid-summer to very short days (3–4 h lig...
Published in: | Journal of Crustacean Biology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
CRUSTACEAN SOC
2018
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/48358/ https://epic.awi.de/id/eprint/48358/1/Piccolin_et_al_2018_Photoperiodic_modulation_of_circadian_functions_in_Antarctic.pdf https://academic.oup.com/jcb/advance-article/doi/10.1093/jcbiol/ruy035/5102881 https://hdl.handle.net/10013/epic.704c42c2-dd04-4dc9-aaf1-cb7389d5cfc4 https://hdl.handle.net/ |
id |
ftawi:oai:epic.awi.de:48358 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:48358 2023-05-15T13:45:21+02:00 Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) Piccolin, Fabio Meyer, Bettina Biscontin, Alberto De Pittà, Cristiano Kawaguchi, So Teschke, Mathias 2018-04-17 application/pdf https://epic.awi.de/id/eprint/48358/ https://epic.awi.de/id/eprint/48358/1/Piccolin_et_al_2018_Photoperiodic_modulation_of_circadian_functions_in_Antarctic.pdf https://academic.oup.com/jcb/advance-article/doi/10.1093/jcbiol/ruy035/5102881 https://hdl.handle.net/10013/epic.704c42c2-dd04-4dc9-aaf1-cb7389d5cfc4 https://hdl.handle.net/ unknown CRUSTACEAN SOC https://epic.awi.de/id/eprint/48358/1/Piccolin_et_al_2018_Photoperiodic_modulation_of_circadian_functions_in_Antarctic.pdf https://hdl.handle.net/ Piccolin, F. , Meyer, B. orcid:0000-0001-6804-9896 , Biscontin, A. , De Pittà, C. , Kawaguchi, S. and Teschke, M. (2018) Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) , Journal of Crustacean Biology, pp. 1-9 . doi:10.1093/jcbiol/ruy035 <https://doi.org/10.1093/jcbiol%2Fruy035> , hdl:10013/epic.704c42c2-dd04-4dc9-aaf1-cb7389d5cfc4 EPIC3Journal of Crustacean Biology, CRUSTACEAN SOC, pp. 1-9, ISSN: 0278-0372 Article isiRev 2018 ftawi https://doi.org/10.1093/jcbiol/ruy035 2021-12-24T15:44:17Z An endogenous circadian clock influences metabolic output rhythms in the Antarctic krill (Euphausia superbaDana, 1850), a key species in the Southern Ocean ecosystem. Seasonal changes in photoperiod in Antarctica, ranging from midnight sun (24 h light) during mid-summer to very short days (3–4 h light) during mid-winter, represent a challenge for the synchronization of the krill circadian clock. We analyzed clock gene activity and clock output functions in krill exposed to different light conditions during a long-term photoperiodic simulation in the laboratory. In simulated early-autumn (light/dark or LD 16:8) and late-winter (LD 8:16) conditions, the circadian clock of krill was functional and the metabolic output was synchronized to the light/dark cycle, the clock genes Esper and Esclk peaked in antiphase around simulated dusk/dawn and most metabolic-related genes showed upregulation around simulated dusk. In contrast, in simulated mid-summer (light/light or LL) and mid-winter (LD 3:21) conditions, the synchronization of the circadian clock and the metabolic output appeared to be weaker, with clock gene expression becoming arrhythmic and upregulation of metabolic genes occurring at different times during the day. Early-autumn and late-winter photoperiodic cues in the laboratory thus seem to be sufficient to entrain the krill clock and promote metabolic synchronization, whereas mid-winter and mid-summer photoperiodic cues seem to be insufficient for krill entrainment. Krill in the field may overcome the seasonal lack of overt photoperiodic cycle occurring during mid-summer and mid-winter by using alternative light-related Zeitgebers (i.e., varying light intensity rather than the presence or absence of light) to promote basic homeostatic rhythms over 24 h. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Southern Ocean midnight sun Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean The Antarctic Journal of Crustacean Biology |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
An endogenous circadian clock influences metabolic output rhythms in the Antarctic krill (Euphausia superbaDana, 1850), a key species in the Southern Ocean ecosystem. Seasonal changes in photoperiod in Antarctica, ranging from midnight sun (24 h light) during mid-summer to very short days (3–4 h light) during mid-winter, represent a challenge for the synchronization of the krill circadian clock. We analyzed clock gene activity and clock output functions in krill exposed to different light conditions during a long-term photoperiodic simulation in the laboratory. In simulated early-autumn (light/dark or LD 16:8) and late-winter (LD 8:16) conditions, the circadian clock of krill was functional and the metabolic output was synchronized to the light/dark cycle, the clock genes Esper and Esclk peaked in antiphase around simulated dusk/dawn and most metabolic-related genes showed upregulation around simulated dusk. In contrast, in simulated mid-summer (light/light or LL) and mid-winter (LD 3:21) conditions, the synchronization of the circadian clock and the metabolic output appeared to be weaker, with clock gene expression becoming arrhythmic and upregulation of metabolic genes occurring at different times during the day. Early-autumn and late-winter photoperiodic cues in the laboratory thus seem to be sufficient to entrain the krill clock and promote metabolic synchronization, whereas mid-winter and mid-summer photoperiodic cues seem to be insufficient for krill entrainment. Krill in the field may overcome the seasonal lack of overt photoperiodic cycle occurring during mid-summer and mid-winter by using alternative light-related Zeitgebers (i.e., varying light intensity rather than the presence or absence of light) to promote basic homeostatic rhythms over 24 h. |
format |
Article in Journal/Newspaper |
author |
Piccolin, Fabio Meyer, Bettina Biscontin, Alberto De Pittà, Cristiano Kawaguchi, So Teschke, Mathias |
spellingShingle |
Piccolin, Fabio Meyer, Bettina Biscontin, Alberto De Pittà, Cristiano Kawaguchi, So Teschke, Mathias Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
author_facet |
Piccolin, Fabio Meyer, Bettina Biscontin, Alberto De Pittà, Cristiano Kawaguchi, So Teschke, Mathias |
author_sort |
Piccolin, Fabio |
title |
Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_short |
Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_full |
Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_fullStr |
Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_full_unstemmed |
Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_sort |
photoperiodic modulation of circadian functions in antarctic krill euphausia superba dana, 1850 (euphausiacea) |
publisher |
CRUSTACEAN SOC |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48358/ https://epic.awi.de/id/eprint/48358/1/Piccolin_et_al_2018_Photoperiodic_modulation_of_circadian_functions_in_Antarctic.pdf https://academic.oup.com/jcb/advance-article/doi/10.1093/jcbiol/ruy035/5102881 https://hdl.handle.net/10013/epic.704c42c2-dd04-4dc9-aaf1-cb7389d5cfc4 https://hdl.handle.net/ |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Southern Ocean midnight sun |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Southern Ocean midnight sun |
op_source |
EPIC3Journal of Crustacean Biology, CRUSTACEAN SOC, pp. 1-9, ISSN: 0278-0372 |
op_relation |
https://epic.awi.de/id/eprint/48358/1/Piccolin_et_al_2018_Photoperiodic_modulation_of_circadian_functions_in_Antarctic.pdf https://hdl.handle.net/ Piccolin, F. , Meyer, B. orcid:0000-0001-6804-9896 , Biscontin, A. , De Pittà, C. , Kawaguchi, S. and Teschke, M. (2018) Photoperiodic modulation of circadian functions in Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) , Journal of Crustacean Biology, pp. 1-9 . doi:10.1093/jcbiol/ruy035 <https://doi.org/10.1093/jcbiol%2Fruy035> , hdl:10013/epic.704c42c2-dd04-4dc9-aaf1-cb7389d5cfc4 |
op_doi |
https://doi.org/10.1093/jcbiol/ruy035 |
container_title |
Journal of Crustacean Biology |
_version_ |
1766221393956962304 |