Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea
We model a summer snapshot of the behavior of Antarctic krill (Euphausia superba) during advection across the Scotia Sea. Individual krill respond to a changing landscape of predation risk and food availability by migrating vertically in the column and choosing an average distance to their nearest n...
Published in: | Journal of Plankton Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Oxford University Press
2009
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/10746/ https://doi.org/10.1093/plankt/fbp062 |
id |
ftnerc:oai:nora.nerc.ac.uk:10746 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:10746 2023-05-15T13:45:10+02:00 Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea Cresswell, Katherine A. Tarling, Geraint A. Thorpe, Sally E. Burrows, Michael T. Wiedenmann, John Mangel, Marc 2009 http://nora.nerc.ac.uk/id/eprint/10746/ https://doi.org/10.1093/plankt/fbp062 unknown Oxford University Press Cresswell, Katherine A.; Tarling, Geraint A. orcid:0000-0002-3753-5899 Thorpe, Sally E. orcid:0000-0002-5193-6955 Burrows, Michael T.; Wiedenmann, John; Mangel, Marc. 2009 Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea. Journal of Plankton Research, 31 (10). 1265-1281. https://doi.org/10.1093/plankt/fbp062 <https://doi.org/10.1093/plankt/fbp062> Marine Sciences Zoology Ecology and Environment Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1093/plankt/fbp062 2023-02-04T19:26:54Z We model a summer snapshot of the behavior of Antarctic krill (Euphausia superba) during advection across the Scotia Sea. Individual krill respond to a changing landscape of predation risk and food availability by migrating vertically in the column and choosing an average distance to their nearest neighbor (swarm density). We determine the optimal behavior of 30, 40 and 50 mm krill using a state-dependent life history model where individuals move along 30-day segments of hypothetical journey tracks in three different regions of the Scotia Sea, with the tracks extracted from a combination of circulation models and surface drifter data. Food availability is based on satellite data for surface Chl and with additional heterotrophic and detritus food components, and mortality is parameterized with respect to distance from shore, daylight and krill swarming-behavior. We predict that proximity to predator colonies has a distinct effect on behavior, particularly on depth choice when food-availability is low. Observations made during an acoustic survey of the region found swarms to be deeper at the Antarctic Peninsula compared with South Georgia, in line with model pedictions. Our pedictions are also consistent with observations that swarm density, changes little on a logarithmic scale across the region. We show that being able to change behavior on short time scales has distinct advantages to krill. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Scotia Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Scotia Sea The Antarctic Journal of Plankton Research 31 10 1265 1281 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Zoology Ecology and Environment |
spellingShingle |
Marine Sciences Zoology Ecology and Environment Cresswell, Katherine A. Tarling, Geraint A. Thorpe, Sally E. Burrows, Michael T. Wiedenmann, John Mangel, Marc Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
topic_facet |
Marine Sciences Zoology Ecology and Environment |
description |
We model a summer snapshot of the behavior of Antarctic krill (Euphausia superba) during advection across the Scotia Sea. Individual krill respond to a changing landscape of predation risk and food availability by migrating vertically in the column and choosing an average distance to their nearest neighbor (swarm density). We determine the optimal behavior of 30, 40 and 50 mm krill using a state-dependent life history model where individuals move along 30-day segments of hypothetical journey tracks in three different regions of the Scotia Sea, with the tracks extracted from a combination of circulation models and surface drifter data. Food availability is based on satellite data for surface Chl and with additional heterotrophic and detritus food components, and mortality is parameterized with respect to distance from shore, daylight and krill swarming-behavior. We predict that proximity to predator colonies has a distinct effect on behavior, particularly on depth choice when food-availability is low. Observations made during an acoustic survey of the region found swarms to be deeper at the Antarctic Peninsula compared with South Georgia, in line with model pedictions. Our pedictions are also consistent with observations that swarm density, changes little on a logarithmic scale across the region. We show that being able to change behavior on short time scales has distinct advantages to krill. |
format |
Article in Journal/Newspaper |
author |
Cresswell, Katherine A. Tarling, Geraint A. Thorpe, Sally E. Burrows, Michael T. Wiedenmann, John Mangel, Marc |
author_facet |
Cresswell, Katherine A. Tarling, Geraint A. Thorpe, Sally E. Burrows, Michael T. Wiedenmann, John Mangel, Marc |
author_sort |
Cresswell, Katherine A. |
title |
Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
title_short |
Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
title_full |
Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
title_fullStr |
Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
title_full_unstemmed |
Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea |
title_sort |
diel vertical migration of antarctic krill (euphausia superba) is flexible during advection across the scotia sea |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/10746/ https://doi.org/10.1093/plankt/fbp062 |
geographic |
Antarctic Antarctic Peninsula Scotia Sea The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Scotia Sea The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Scotia Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Euphausia superba Scotia Sea |
op_relation |
Cresswell, Katherine A.; Tarling, Geraint A. orcid:0000-0002-3753-5899 Thorpe, Sally E. orcid:0000-0002-5193-6955 Burrows, Michael T.; Wiedenmann, John; Mangel, Marc. 2009 Diel vertical migration of Antarctic krill (Euphausia superba) is flexible during advection across the Scotia Sea. Journal of Plankton Research, 31 (10). 1265-1281. https://doi.org/10.1093/plankt/fbp062 <https://doi.org/10.1093/plankt/fbp062> |
op_doi |
https://doi.org/10.1093/plankt/fbp062 |
container_title |
Journal of Plankton Research |
container_volume |
31 |
container_issue |
10 |
container_start_page |
1265 |
op_container_end_page |
1281 |
_version_ |
1766214261920497664 |