Feeding of Calanus finmarchicus nauplii in the Irminger Sea
Recent studies have shown that the passage from nauplius to copepodite is a key event in the population dynamics of Calanus finmarchicus. As a first step towards understanding if and how trophic interactions influence this event, we investigated the feeding of C. finmarchicus nauplii IV-VI in the Ir...
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ftsouthampton:oai:eprints.soton.ac.uk:2024 2024-06-09T07:45:13+00:00 Feeding of Calanus finmarchicus nauplii in the Irminger Sea Irigoien, X. Titelman, J. Harris, R.P. Harbour, D. Castellani, C. 2003 https://eprints.soton.ac.uk/2024/ http://www.int-res.com/abstracts/meps/v262/p193-200.html unknown Irigoien, X., Titelman, J., Harris, R.P., Harbour, D. and Castellani, C. (2003) Feeding of Calanus finmarchicus nauplii in the Irminger Sea. Marine Ecology Progress Series, 262, 193-200. Article PeerReviewed 2003 ftsouthampton 2024-05-10T06:09:09Z Recent studies have shown that the passage from nauplius to copepodite is a key event in the population dynamics of Calanus finmarchicus. As a first step towards understanding if and how trophic interactions influence this event, we investigated the feeding of C. finmarchicus nauplii IV-VI in the Irminger Sea during spring and summer in a series of incubation experiments. Generally, feeding efficiencies were highest on large cells, whereas small flagellates were ingested at very low rates. Colonies of Phaeocystis sp. were not ingested. Among the larger cells, the diatoms Chaetoceros pelagicus and Tropodineis sp. and the ciliate Strombidium sp. were the main food sources. We observed a negative relationship between the percentage of diatoms in the food environment and the filtration rate on Strombidium sp. We therefore suggest that the combination of low feeding efficiency on small cells and the generally low concentrations of ciliates in oceanic waters explains why C. finmarchicus relies on phytoplankton blooms for recruitment from nauplius to the first copepodite stage. Article in Journal/Newspaper Calanus finmarchicus University of Southampton: e-Prints Soton Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Recent studies have shown that the passage from nauplius to copepodite is a key event in the population dynamics of Calanus finmarchicus. As a first step towards understanding if and how trophic interactions influence this event, we investigated the feeding of C. finmarchicus nauplii IV-VI in the Irminger Sea during spring and summer in a series of incubation experiments. Generally, feeding efficiencies were highest on large cells, whereas small flagellates were ingested at very low rates. Colonies of Phaeocystis sp. were not ingested. Among the larger cells, the diatoms Chaetoceros pelagicus and Tropodineis sp. and the ciliate Strombidium sp. were the main food sources. We observed a negative relationship between the percentage of diatoms in the food environment and the filtration rate on Strombidium sp. We therefore suggest that the combination of low feeding efficiency on small cells and the generally low concentrations of ciliates in oceanic waters explains why C. finmarchicus relies on phytoplankton blooms for recruitment from nauplius to the first copepodite stage. |
format |
Article in Journal/Newspaper |
author |
Irigoien, X. Titelman, J. Harris, R.P. Harbour, D. Castellani, C. |
spellingShingle |
Irigoien, X. Titelman, J. Harris, R.P. Harbour, D. Castellani, C. Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
author_facet |
Irigoien, X. Titelman, J. Harris, R.P. Harbour, D. Castellani, C. |
author_sort |
Irigoien, X. |
title |
Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
title_short |
Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
title_full |
Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
title_fullStr |
Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
title_full_unstemmed |
Feeding of Calanus finmarchicus nauplii in the Irminger Sea |
title_sort |
feeding of calanus finmarchicus nauplii in the irminger sea |
publishDate |
2003 |
url |
https://eprints.soton.ac.uk/2024/ http://www.int-res.com/abstracts/meps/v262/p193-200.html |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_relation |
Irigoien, X., Titelman, J., Harris, R.P., Harbour, D. and Castellani, C. (2003) Feeding of Calanus finmarchicus nauplii in the Irminger Sea. Marine Ecology Progress Series, 262, 193-200. |
_version_ |
1801374264370135040 |