Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis
Gut evacuation rates and ingestion rates were measured for the krill Thysanoessa raschii and T. inermis in Godthåbsfjord, SW Greenland. Combined with biomass of the krill community, the grazing potential on phytoplankton along the fjord was estimated. Gut evacuation rates were 3.9 and 2.3 h−1 for T....
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Language: | English |
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2015
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Online Access: | https://orbit.dtu.dk/en/publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 https://doi.org/10.1007/s00227-014-2573-9 |
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ftdtupubl:oai:pure.atira.dk:publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 2023-12-24T10:16:59+01:00 Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis Teglhus, Frederik Wolff Agersted, Mette Dalgaard Arendt, Kristine Engel Nielsen, Torkel Gissel 2015 https://orbit.dtu.dk/en/publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 https://doi.org/10.1007/s00227-014-2573-9 eng eng info:eu-repo/grantAgreement/EC/FP7/264933 https://orbit.dtu.dk/en/publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 info:eu-repo/semantics/restrictedAccess Teglhus , F W , Agersted , M D , Arendt , K E & Nielsen , T G 2015 , ' Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis ' , Marine Biology , vol. 162 , no. 1 , pp. 169-180 . https://doi.org/10.1007/s00227-014-2573-9 article 2015 ftdtupubl https://doi.org/10.1007/s00227-014-2573-9 2023-11-30T00:00:16Z Gut evacuation rates and ingestion rates were measured for the krill Thysanoessa raschii and T. inermis in Godthåbsfjord, SW Greenland. Combined with biomass of the krill community, the grazing potential on phytoplankton along the fjord was estimated. Gut evacuation rates were 3.9 and 2.3 h−1 for T. raschii and T. inermis, respectively. Ingestion rates were 12.2 ± 7.5 μg C mg C−1 day−1 (n = 4) for T. inermis and 4.9 ± 3.2 μg C mg C−1 day−1 (n = 4) for T. raschii, corresponding to daily rations of 1.2 and 0.5 % body carbon day−1. Clearance experiments conducted in parallel to the gut evacuation experiment gave similar results for ingestion rates and daily rations. Krill biomass was highest in the central part of the fjord’s length, with T. raschii dominating. Community grazing rates from krill and copepods were comparable; however, their combined impact was low, estimated as <1 % of phytoplankton standing stock being removed per day during this late spring study Article in Journal/Newspaper Godthåbsfjord Greenland Thysanoessa raschii Copepods Technical University of Denmark: DTU Orbit Greenland Marine Biology 162 1 169 180 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Gut evacuation rates and ingestion rates were measured for the krill Thysanoessa raschii and T. inermis in Godthåbsfjord, SW Greenland. Combined with biomass of the krill community, the grazing potential on phytoplankton along the fjord was estimated. Gut evacuation rates were 3.9 and 2.3 h−1 for T. raschii and T. inermis, respectively. Ingestion rates were 12.2 ± 7.5 μg C mg C−1 day−1 (n = 4) for T. inermis and 4.9 ± 3.2 μg C mg C−1 day−1 (n = 4) for T. raschii, corresponding to daily rations of 1.2 and 0.5 % body carbon day−1. Clearance experiments conducted in parallel to the gut evacuation experiment gave similar results for ingestion rates and daily rations. Krill biomass was highest in the central part of the fjord’s length, with T. raschii dominating. Community grazing rates from krill and copepods were comparable; however, their combined impact was low, estimated as <1 % of phytoplankton standing stock being removed per day during this late spring study |
format |
Article in Journal/Newspaper |
author |
Teglhus, Frederik Wolff Agersted, Mette Dalgaard Arendt, Kristine Engel Nielsen, Torkel Gissel |
spellingShingle |
Teglhus, Frederik Wolff Agersted, Mette Dalgaard Arendt, Kristine Engel Nielsen, Torkel Gissel Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
author_facet |
Teglhus, Frederik Wolff Agersted, Mette Dalgaard Arendt, Kristine Engel Nielsen, Torkel Gissel |
author_sort |
Teglhus, Frederik Wolff |
title |
Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
title_short |
Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
title_full |
Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
title_fullStr |
Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
title_full_unstemmed |
Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
title_sort |
gut evacuation rate and grazing impact of the krill thysanoessa raschii and t. inermis |
publishDate |
2015 |
url |
https://orbit.dtu.dk/en/publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 https://doi.org/10.1007/s00227-014-2573-9 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Godthåbsfjord Greenland Thysanoessa raschii Copepods |
genre_facet |
Godthåbsfjord Greenland Thysanoessa raschii Copepods |
op_source |
Teglhus , F W , Agersted , M D , Arendt , K E & Nielsen , T G 2015 , ' Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis ' , Marine Biology , vol. 162 , no. 1 , pp. 169-180 . https://doi.org/10.1007/s00227-014-2573-9 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264933 https://orbit.dtu.dk/en/publications/93b4b2b0-73fc-4454-b909-5eb0096075f0 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00227-014-2573-9 |
container_title |
Marine Biology |
container_volume |
162 |
container_issue |
1 |
container_start_page |
169 |
op_container_end_page |
180 |
_version_ |
1786204733867819008 |