Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic
The present investigation reviews published data on the feeding rates and prey selection of Oithona similis females, Calanus finmarchicus nauplii and females in the Irminger Sea in April/May and July/August 2002. Our aim was to examine how the feeding rates and prey selection of these three copepod...
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2008
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fthighwire:oai:open-archive.highwire.org:plankt:30/10/1095 2023-05-15T15:47:55+02:00 Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic Castellani, Claudia Irigoien, Xabier Mayor, Daniel J. Harris, Roger P. Wilson, David 2008-10-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/30/10/1095 https://doi.org/10.1093/plankt/fbn074 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/30/10/1095 http://dx.doi.org/10.1093/plankt/fbn074 Copyright (C) 2008, Oxford University Press ORIGINAL ARTICLES TEXT 2008 fthighwire https://doi.org/10.1093/plankt/fbn074 2013-05-26T18:07:34Z The present investigation reviews published data on the feeding rates and prey selection of Oithona similis females, Calanus finmarchicus nauplii and females in the Irminger Sea in April/May and July/August 2002. Our aim was to examine how the feeding rates and prey selection of these three copepod stages respond to concomitant changes in microplankton community composition and prey abundance. Copepods typically ingested prey overall according to its ambient concentration although significant species and stage-specific differences in prey-type ingestion and selection were apparent. Despite being of comparable weight, the ingestion rates of C. finmarchicus nauplii were always higher than those of the O. similis females. Moreover, C. finmarchicus nauplii and O. similis females fed preferentially on diatoms and ciliates respectively, whereas adult female C. finmarchicus showed limited prey selectivity. Copepod grazing impact on total and on ciliates/dinoflagellates standing stock was <0.5 and <2%, respectively. We attribute this result to a combination of low grazing rates, low copepod abundance and low microplankton biomass, all of which are indicative of the non-bloom conditions under which these experiments were conducted. The differences in copepod feeding rates and prey selection we report reflect species and stage-specific eco-physiological adaptations, which may act as important driving forces for marine ecosystem structuring and functioning. Text Calanus finmarchicus North Atlantic Copepods HighWire Press (Stanford University) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Journal of Plankton Research 30 10 1095 1116 |
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HighWire Press (Stanford University) |
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English |
topic |
ORIGINAL ARTICLES |
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ORIGINAL ARTICLES Castellani, Claudia Irigoien, Xabier Mayor, Daniel J. Harris, Roger P. Wilson, David Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
topic_facet |
ORIGINAL ARTICLES |
description |
The present investigation reviews published data on the feeding rates and prey selection of Oithona similis females, Calanus finmarchicus nauplii and females in the Irminger Sea in April/May and July/August 2002. Our aim was to examine how the feeding rates and prey selection of these three copepod stages respond to concomitant changes in microplankton community composition and prey abundance. Copepods typically ingested prey overall according to its ambient concentration although significant species and stage-specific differences in prey-type ingestion and selection were apparent. Despite being of comparable weight, the ingestion rates of C. finmarchicus nauplii were always higher than those of the O. similis females. Moreover, C. finmarchicus nauplii and O. similis females fed preferentially on diatoms and ciliates respectively, whereas adult female C. finmarchicus showed limited prey selectivity. Copepod grazing impact on total and on ciliates/dinoflagellates standing stock was <0.5 and <2%, respectively. We attribute this result to a combination of low grazing rates, low copepod abundance and low microplankton biomass, all of which are indicative of the non-bloom conditions under which these experiments were conducted. The differences in copepod feeding rates and prey selection we report reflect species and stage-specific eco-physiological adaptations, which may act as important driving forces for marine ecosystem structuring and functioning. |
format |
Text |
author |
Castellani, Claudia Irigoien, Xabier Mayor, Daniel J. Harris, Roger P. Wilson, David |
author_facet |
Castellani, Claudia Irigoien, Xabier Mayor, Daniel J. Harris, Roger P. Wilson, David |
author_sort |
Castellani, Claudia |
title |
Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
title_short |
Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
title_full |
Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
title_fullStr |
Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
title_full_unstemmed |
Feeding of Calanus finmarchicus and Oithona similis on the microplankton assemblage in the Irminger Sea, North Atlantic |
title_sort |
feeding of calanus finmarchicus and oithona similis on the microplankton assemblage in the irminger sea, north atlantic |
publisher |
Oxford University Press |
publishDate |
2008 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/30/10/1095 https://doi.org/10.1093/plankt/fbn074 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Calanus finmarchicus North Atlantic Copepods |
genre_facet |
Calanus finmarchicus North Atlantic Copepods |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/30/10/1095 http://dx.doi.org/10.1093/plankt/fbn074 |
op_rights |
Copyright (C) 2008, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/fbn074 |
container_title |
Journal of Plankton Research |
container_volume |
30 |
container_issue |
10 |
container_start_page |
1095 |
op_container_end_page |
1116 |
_version_ |
1766382900810350592 |