c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm?
Antarctic krill (Euphausia superba) is a keystone species in the southern ocean ecosystem where it is the main consumer of phytoplankton and constitutes the main food item of many higher predators. Both food and predators are most abundant at the surface, thus krill hide in the depth of the ocean du...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.586.3201 2023-05-15T13:50:09+02:00 c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.3201 http://www.ias.ac.in/jgenet/Vol87No5/473.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.3201 http://www.ias.ac.in/jgenet/Vol87No5/473.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ias.ac.in/jgenet/Vol87No5/473.pdf text ftciteseerx 2016-01-08T13:16:54Z Antarctic krill (Euphausia superba) is a keystone species in the southern ocean ecosystem where it is the main consumer of phytoplankton and constitutes the main food item of many higher predators. Both food and predators are most abundant at the surface, thus krill hide in the depth of the ocean during the day and migrate to the upper layers at night, to feed at a time when the predatory risk is lowest. Although the functional significance of this diel vertical migration (DVM) is clear and its modulation by environmental factors has been described, the involvement of an endogenous circadian clock in this behaviour is as yet not fully resolved. We have analysed the circadian behaviour of Euphausia superba in a laboratory setting and here we present the first description of locomotor activity rhythms for this species. Our results are in agreement with the hypothesis that the circadian clock plays a key role in DVM. They also suggest that the interplay between food availability, social cues and the light:dark cycle acts as the predominant Zeitgeber for DVM in this species. Text Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean Unknown Antarctic Indian Southern Ocean |
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ftciteseerx |
language |
English |
description |
Antarctic krill (Euphausia superba) is a keystone species in the southern ocean ecosystem where it is the main consumer of phytoplankton and constitutes the main food item of many higher predators. Both food and predators are most abundant at the surface, thus krill hide in the depth of the ocean during the day and migrate to the upper layers at night, to feed at a time when the predatory risk is lowest. Although the functional significance of this diel vertical migration (DVM) is clear and its modulation by environmental factors has been described, the involvement of an endogenous circadian clock in this behaviour is as yet not fully resolved. We have analysed the circadian behaviour of Euphausia superba in a laboratory setting and here we present the first description of locomotor activity rhythms for this species. Our results are in agreement with the hypothesis that the circadian clock plays a key role in DVM. They also suggest that the interplay between food availability, social cues and the light:dark cycle acts as the predominant Zeitgeber for DVM in this species. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou |
spellingShingle |
Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
author_facet |
Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou |
author_sort |
Edward Gaten |
title |
c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
title_short |
c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
title_full |
c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
title_fullStr |
c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
title_full_unstemmed |
c © Indian Academy of Sciences RESEARCH ARTICLE Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? |
title_sort |
c © indian academy of sciences research article is vertical migration in antarctic krill (euphausia superba) influenced by an underlying circadian rhythm? |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.3201 http://www.ias.ac.in/jgenet/Vol87No5/473.pdf |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_source |
http://www.ias.ac.in/jgenet/Vol87No5/473.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.3201 http://www.ias.ac.in/jgenet/Vol87No5/473.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766253120312049664 |