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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Online Access: | https://zenodo.org/record/20585 https://doi.org/10.1007/s00227-014-2573-9 |
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ftzenodo:oai:zenodo.org:20585 2023-06-06T11:54:00+02:00 Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis Telghus, F. W. Agersted, M. D. Arendt, K. E. Nielsen, T. G. 2015-01-01 https://zenodo.org/record/20585 https://doi.org/10.1007/s00227-014-2573-9 unknown info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/record/20585 https://doi.org/10.1007/s00227-014-2573-9 oai:zenodo.org:20585 info:eu-repo/semantics/openAccess Marine Biology 162(1) 169-180 (2015) info:eu-repo/semantics/article publication-article 2015 ftzenodo https://doi.org/10.1007/s00227-014-2573-9 2023-04-13T21:58:56Z 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 Zenodo Greenland Marine Biology 162 1 169 180 |
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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 |
Telghus, F. W. Agersted, M. D. Arendt, K. E. Nielsen, T. G. |
spellingShingle |
Telghus, F. W. Agersted, M. D. Arendt, K. E. Nielsen, T. G. Gut evacuation rate and grazing impact of the krill Thysanoessa raschii and T. inermis |
author_facet |
Telghus, F. W. Agersted, M. D. Arendt, K. E. Nielsen, T. G. |
author_sort |
Telghus, F. W. |
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://zenodo.org/record/20585 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 |
Marine Biology 162(1) 169-180 (2015) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/record/20585 https://doi.org/10.1007/s00227-014-2573-9 oai:zenodo.org:20585 |
op_rights |
info:eu-repo/semantics/openAccess |
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_ |
1767960396415631360 |