Skip Navigation


JPR Advance Access originally published online on December 6, 2006
Journal of Plankton Research 2007 29(Supplement 1):i85-i96; doi:10.1093/plankt/fbl069
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
29/suppl_1/i85    most recent
fbl069v1
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 Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Ara, K.
Right arrow Articles by Hiromi, J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Ara, K.
Right arrow Articles by Hiromi, J.
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

Temporal variability in primary and copepod production in Sagami Bay, Japan

Koichi Ara* and Juro Hiromi

Department of Marine Science and Resources, College of Bioresource Sciences, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-8510, Japan

* Corresponding author: arakoich{at}brs.nihon-u.ac.jp

Received on November 15, 2005; accepted on October 26, 2006


  Abstract

Seasonal variations in primary production and in abundance, biomass and production of the planktonic copepod community were investigated in the neritic area of Sagami Bay, Kanagawa, Japan, from January 2002 to December 2004. Primary production (PP) determined by 13C in situ incubation was ca. 0–1321.4 µg C L–1 day–1 (or 0.044–4.643 g C m–2 day–1). Copepod abundance, biomass and production rates showed remarkable seasonal and interannual variations, being highest in March 2002, with an overall mean of 3.11 x 103 ind. m–3, 8.85 mg C m–3 and 0.94 mg C m–3 day,–1, respectively. The depth-integrated copepod secondary (SP) and tertiary production (TP) was 0.0038–0.401 and 0.00079–0.048 g C m–2 day–1, respectively. Transfer efficiencies from PP to SP and TP was 0.3–74.6% (mean: 4.1%) and 0.1–27.5% (mean: 0.8%), respectively. Transfer efficiency of PP–SP and PP–TP decreased exponentially with PP, and there were significant correlations between PP and transfer efficiency of PP–SP and PP–TP, respectively. The depth-integrated food requirement by copepod secondary and tertiary producers was estimated to be 0.012–1.29 and 0.0024–0.185 g C m–2 day–1, corresponding to 1.1–267.6% (mean: 14.3%) and 0.2–105.6% (mean: 2.6%) of PP, respectively.

Communicating editor: R.P. Harris


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.