Skip Navigation


JPR Advance Access originally published online on September 20, 2006
Journal of Plankton Research 2006 28(12):1167-1179; doi:10.1093/plankt/fbl047
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
28/12/1167    most recent
fbl047v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (2)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Mayor, D. J.
Right arrow Articles by Harris, R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Mayor, D. J.
Right arrow Articles by Harris, R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Feeding and reproduction of Calanus finmarchicus during non-bloom conditions in the Irminger Sea

Daniel J. Mayor1,*,{dagger}, Thomas R. Anderson1, Xabier Irigoien2 and Roger Harris3

1 National Oceanography Centre, Southampton, University of Southampton, Waterfront Campus, Southampton, SO14 3ZH, UK 2 Azti, Herrera Kaia Portualdea, Z/G, 20110 Gipuzkoa, Spain and 3 Plymouth Marine Laboratory, Prospect Place, Plymouth, PL1 3DH, UK {dagger} Present Address: Oceanlab, University of Aberdeen, Main Street, Newburgh AB41 6AA, UK

* Corresponding Author: dan.mayor{at}abdn.ac.uk

Received on June 23, 2006; revised on August 4, 2006; accepted on September 15, 2006

Communicating editor: K.J. Flynn


  Abstract

Simultaneous ingestion and egg production experiments were conducted with female Calanus finmarchicus in April/May and July/August 2002 in the Irminger Sea. Experimental animals were provided with natural microplankton food assemblages and incubated under in situ conditions for 24 h. The quantity of food consumed was significantly related to the concentration of prey cells, with total daily ingestion rates ranging from 0.6 to 8.1 µg of carbon female–1 day–1, corresponding to carbon-specific rates of 0.6–4.7% day–1. Egg production rates (EPRs) remained relatively low (0.3–11 eggs female–1 day–1) during both periods of investigation and were not influenced by food availability. The data were used to construct energetic budgets in which the microplankton carbon ingested, including ciliates, was compared with the carbon utilized for egg production and respiration. These budgets showed that ingestion alone could not provide the necessary carbon to sustain the observed demands for growth and metabolism. Although ciliates constituted >80% of the total material ingested at times, they were not sufficient to provide the metabolic shortfall. Indeed, the females were typically lacking ~5 µg of carbon each day, ~5% of their carbon biomass. Our study results highlight the possible importance of internal reserves in sustaining reproduction in C. finmarchicus during periods of food scarcity.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.