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...
Main Authors: | , , , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | unknown |
Published: |
2008
|
Subjects: | |
Online Access: | https://figshare.com/articles/journal_contribution/Is_Vertical_Migration_in_Antarctic_Krill_Euphausia_Superba_Influenced_by_an_Underlying_Circadian_Rhythm_/10106678 |
id |
ftleicesterunfig:oai:figshare.com:article/10106678 |
---|---|
record_format |
openpolar |
spelling |
ftleicesterunfig:oai:figshare.com:article/10106678 2023-05-15T13:43:29+02:00 Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou Ezio Rosato 2008-12-31T00:00:00Z https://figshare.com/articles/journal_contribution/Is_Vertical_Migration_in_Antarctic_Krill_Euphausia_Superba_Influenced_by_an_Underlying_Circadian_Rhythm_/10106678 unknown 2381/10879 https://figshare.com/articles/journal_contribution/Is_Vertical_Migration_in_Antarctic_Krill_Euphausia_Superba_Influenced_by_an_Underlying_Circadian_Rhythm_/10106678 All Rights Reserved Uncategorized Animal Migration Animals Circadian Rhythm Ecosystem Euphausiacea Motor Activity Periodicity Photoperiod Text Journal contribution 2008 ftleicesterunfig 2021-11-11T20:07:10Z 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. Other Non-Article Part of Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean University of Leicester: Figshare Antarctic Southern Ocean |
institution |
Open Polar |
collection |
University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Uncategorized Animal Migration Animals Circadian Rhythm Ecosystem Euphausiacea Motor Activity Periodicity Photoperiod |
spellingShingle |
Uncategorized Animal Migration Animals Circadian Rhythm Ecosystem Euphausiacea Motor Activity Periodicity Photoperiod Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou Ezio Rosato Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
topic_facet |
Uncategorized Animal Migration Animals Circadian Rhythm Ecosystem Euphausiacea Motor Activity Periodicity Photoperiod |
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. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou Ezio Rosato |
author_facet |
Edward Gaten Geraint Tarling Harold Dowse Charalambos Kyriacou Ezio Rosato |
author_sort |
Edward Gaten |
title |
Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
title_short |
Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
title_full |
Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
title_fullStr |
Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
title_full_unstemmed |
Is Vertical Migration in Antarctic Krill (Euphausia Superba) Influenced by an Underlying Circadian Rhythm? |
title_sort |
is vertical migration in antarctic krill (euphausia superba) influenced by an underlying circadian rhythm? |
publishDate |
2008 |
url |
https://figshare.com/articles/journal_contribution/Is_Vertical_Migration_in_Antarctic_Krill_Euphausia_Superba_Influenced_by_an_Underlying_Circadian_Rhythm_/10106678 |
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_relation |
2381/10879 https://figshare.com/articles/journal_contribution/Is_Vertical_Migration_in_Antarctic_Krill_Euphausia_Superba_Influenced_by_an_Underlying_Circadian_Rhythm_/10106678 |
op_rights |
All Rights Reserved |
_version_ |
1766189610942070784 |