Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard)
Ingestion rates and selectivity of the Arctic pelagic amphipod Themisto libellula were studied experimentally in Kongsfjorden (Svalbard, 78A degrees N) during the summer period. Feeding incubations were conducted on naturally occurring copepod communities at different concentrations ranging from 25...
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Online Access: | https://hal.science/hal-03505005 https://doi.org/10.1007/s00300-009-0655-9 |
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ftinsu:oai:HAL:hal-03505005v1 2024-02-11T10:00:56+01:00 Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) Noyon, Margaux Gasparini, Stephane Mayzaud, Patrick Ocean Sciences & Marine Food Security Port Elizabeth, South Africa Nelson Mandela University Port Elizabeth Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.science/hal-03505005 https://doi.org/10.1007/s00300-009-0655-9 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-009-0655-9 hal-03505005 https://hal.science/hal-03505005 doi:10.1007/s00300-009-0655-9 Polar Biology https://hal.science/hal-03505005 Polar Biology, 2009, 32 (11), pp.1559-1570. ⟨10.1007/s00300-009-0655-9⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftinsu https://doi.org/10.1007/s00300-009-0655-9 2024-01-24T17:30:19Z Ingestion rates and selectivity of the Arctic pelagic amphipod Themisto libellula were studied experimentally in Kongsfjorden (Svalbard, 78A degrees N) during the summer period. Feeding incubations were conducted on naturally occurring copepod communities at different concentrations ranging from 25 to 250 preys L-1. The ingestion rates increased with food availability from 1.3 to 17.7 preys ind(-1) day(-1), which corresponded to 0.3-11% of body carbon day(-1). Despite the high prey concentration used in the experiments the satiation level was not reached. We suggested that T. libellula is able to take the maximum benefit from dense patches of preys, which represent a good adaptation to the high variability in food supply characteristic of polar environment. Copepodids stage III of Calanus spp. appeared to be the preferred preys of T. libellula. Smaller copepods such as Oithona similis and Pseudocalanus spp., were also selected but only when their relative abundance exceeded 25% of the total prey available. The potential predation impact of T. libellula is discussed in relation to the mesozooplankton small-scale patchiness and predator abundance. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Mesozooplankton Polar Biology Svalbard Themisto Themisto libellula Copepods Institut national des sciences de l'Univers: HAL-INSU Arctic Svalbard Polar Biology 32 11 1559 1570 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Noyon, Margaux Gasparini, Stephane Mayzaud, Patrick Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
Ingestion rates and selectivity of the Arctic pelagic amphipod Themisto libellula were studied experimentally in Kongsfjorden (Svalbard, 78A degrees N) during the summer period. Feeding incubations were conducted on naturally occurring copepod communities at different concentrations ranging from 25 to 250 preys L-1. The ingestion rates increased with food availability from 1.3 to 17.7 preys ind(-1) day(-1), which corresponded to 0.3-11% of body carbon day(-1). Despite the high prey concentration used in the experiments the satiation level was not reached. We suggested that T. libellula is able to take the maximum benefit from dense patches of preys, which represent a good adaptation to the high variability in food supply characteristic of polar environment. Copepodids stage III of Calanus spp. appeared to be the preferred preys of T. libellula. Smaller copepods such as Oithona similis and Pseudocalanus spp., were also selected but only when their relative abundance exceeded 25% of the total prey available. The potential predation impact of T. libellula is discussed in relation to the mesozooplankton small-scale patchiness and predator abundance. |
author2 |
Ocean Sciences & Marine Food Security Port Elizabeth, South Africa Nelson Mandela University Port Elizabeth Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Noyon, Margaux Gasparini, Stephane Mayzaud, Patrick |
author_facet |
Noyon, Margaux Gasparini, Stephane Mayzaud, Patrick |
author_sort |
Noyon, Margaux |
title |
Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
title_short |
Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
title_full |
Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
title_fullStr |
Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
title_full_unstemmed |
Feeding of Themisto libellula (Amphipoda Crustacea) on natural copepods assemblages in an Arctic fjord (Kongsfjorden, Svalbard) |
title_sort |
feeding of themisto libellula (amphipoda crustacea) on natural copepods assemblages in an arctic fjord (kongsfjorden, svalbard) |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-03505005 https://doi.org/10.1007/s00300-009-0655-9 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden Mesozooplankton Polar Biology Svalbard Themisto Themisto libellula Copepods |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Mesozooplankton Polar Biology Svalbard Themisto Themisto libellula Copepods |
op_source |
Polar Biology https://hal.science/hal-03505005 Polar Biology, 2009, 32 (11), pp.1559-1570. ⟨10.1007/s00300-009-0655-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-009-0655-9 hal-03505005 https://hal.science/hal-03505005 doi:10.1007/s00300-009-0655-9 |
op_doi |
https://doi.org/10.1007/s00300-009-0655-9 |
container_title |
Polar Biology |
container_volume |
32 |
container_issue |
11 |
container_start_page |
1559 |
op_container_end_page |
1570 |
_version_ |
1790596656424550400 |