Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity
Light regime is an important zeitgeber for Antarctic krill (Euphausia superba Dana, 1850), which seems to entrain an endogenous timing system that synchronizes its life cycle to the extreme light conditions in the Southern Ocean. To understand the flexibility of Antarctic krill’s seasonal cycle, we...
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ftawi:oai:epic.awi.de:48423 2024-09-09T19:04:06+00:00 Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity Höring, Flavia Teschke, Mathias Suberg, Lavinia Kawaguchi, So Meyer, Bettina 2018 application/pdf https://epic.awi.de/id/eprint/48423/ https://epic.awi.de/id/eprint/48423/1/cjz-2017-0353.pdf https://doi.org/10.1139/cjz-2017-0353 https://hdl.handle.net/10013/epic.6085ad15-6b71-4439-b437-a74d3e0bed75 unknown https://epic.awi.de/id/eprint/48423/1/cjz-2017-0353.pdf Höring, F. orcid:0000-0002-0618-7481 , Teschke, M. , Suberg, L. , Kawaguchi, S. and Meyer, B. orcid:0000-0001-6804-9896 (2018) Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity , Canadian Journal of Zoology, 96 (11), pp. 1203-1213 . doi:10.1139/cjz-2017-0353 <https://doi.org/10.1139/cjz-2017-0353> , hdl:10013/epic.6085ad15-6b71-4439-b437-a74d3e0bed75 EPIC3Canadian Journal of Zoology, 96(11), pp. 1203-1213, ISSN: 0008-4301 Article isiRev 2018 ftawi https://doi.org/10.1139/cjz-2017-0353 2024-06-24T04:21:00Z Light regime is an important zeitgeber for Antarctic krill (Euphausia superba Dana, 1850), which seems to entrain an endogenous timing system that synchronizes its life cycle to the extreme light conditions in the Southern Ocean. To understand the flexibility of Antarctic krill’s seasonal cycle, we investigated its physiological and behavioural responses to different light regimes and if an endogenous timing system was involved in the regulation of these seasonal processes. We analysed growth, feeding, lipid content, and maturity in a 2-year laboratory experiment simulating the latitudinal light regimes at 52°S and 66°S and constant darkness under constant food level. Our results showed that light regime affected seasonal cycles of growth, feeding, lipid metabolism, and maturity in Antarctic krill. Seasonal patterns of growth, feeding, and maturity persisted under constant darkness, indicating the presence of an endogenous timing system. The maturity cycle showed differences in critical photoperiods according to the simulated latitudinal light regime. This suggests a flexible endogenous timing mechanism in Antarctic krill, which may determine its response to future environmental changes. 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) Antarctic Southern Ocean Canadian Journal of Zoology 96 11 1203 1213 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Light regime is an important zeitgeber for Antarctic krill (Euphausia superba Dana, 1850), which seems to entrain an endogenous timing system that synchronizes its life cycle to the extreme light conditions in the Southern Ocean. To understand the flexibility of Antarctic krill’s seasonal cycle, we investigated its physiological and behavioural responses to different light regimes and if an endogenous timing system was involved in the regulation of these seasonal processes. We analysed growth, feeding, lipid content, and maturity in a 2-year laboratory experiment simulating the latitudinal light regimes at 52°S and 66°S and constant darkness under constant food level. Our results showed that light regime affected seasonal cycles of growth, feeding, lipid metabolism, and maturity in Antarctic krill. Seasonal patterns of growth, feeding, and maturity persisted under constant darkness, indicating the presence of an endogenous timing system. The maturity cycle showed differences in critical photoperiods according to the simulated latitudinal light regime. This suggests a flexible endogenous timing mechanism in Antarctic krill, which may determine its response to future environmental changes. |
format |
Article in Journal/Newspaper |
author |
Höring, Flavia Teschke, Mathias Suberg, Lavinia Kawaguchi, So Meyer, Bettina |
spellingShingle |
Höring, Flavia Teschke, Mathias Suberg, Lavinia Kawaguchi, So Meyer, Bettina Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
author_facet |
Höring, Flavia Teschke, Mathias Suberg, Lavinia Kawaguchi, So Meyer, Bettina |
author_sort |
Höring, Flavia |
title |
Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
title_short |
Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
title_full |
Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
title_fullStr |
Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
title_full_unstemmed |
Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
title_sort |
light regime affects the seasonal cycle of antarctic krill (euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48423/ https://epic.awi.de/id/eprint/48423/1/cjz-2017-0353.pdf https://doi.org/10.1139/cjz-2017-0353 https://hdl.handle.net/10013/epic.6085ad15-6b71-4439-b437-a74d3e0bed75 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_source |
EPIC3Canadian Journal of Zoology, 96(11), pp. 1203-1213, ISSN: 0008-4301 |
op_relation |
https://epic.awi.de/id/eprint/48423/1/cjz-2017-0353.pdf Höring, F. orcid:0000-0002-0618-7481 , Teschke, M. , Suberg, L. , Kawaguchi, S. and Meyer, B. orcid:0000-0001-6804-9896 (2018) Light regime affects the seasonal cycle of Antarctic krill (Euphausia superba): impacts on growth, feeding, lipid metabolism, and maturity , Canadian Journal of Zoology, 96 (11), pp. 1203-1213 . doi:10.1139/cjz-2017-0353 <https://doi.org/10.1139/cjz-2017-0353> , hdl:10013/epic.6085ad15-6b71-4439-b437-a74d3e0bed75 |
op_doi |
https://doi.org/10.1139/cjz-2017-0353 |
container_title |
Canadian Journal of Zoology |
container_volume |
96 |
container_issue |
11 |
container_start_page |
1203 |
op_container_end_page |
1213 |
_version_ |
1809818089049554944 |