Skip Navigation

This Article
Right arrow Full Text (PDF)
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 Miller, R. J.
Right arrow Articles by Daan, R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Miller, R. J.
Right arrow Articles by Daan, R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

JOURNAL OF PLANKTON RESEARCH | VOLUME 11 | NUMBER 2 | PAGES 263-282 | 1989
© Oxford University Press

research-article

Planktonic predators and copepod abundance near the Dutch coast

Robert J. Miller and Rogier Daan1

Halifax Fisheries Research Laboratory, Canada Department of Fisheries and Oceans Halifax, Nova Scotia, Canada B3J 2S7 1Netherlands Institute of Sea Research PO Box 59, 1790 AB Den Berg, Texel, The Netherlands

Received on March 17, 1988; accepted on December 6, 1988 Hypotheses that planktonic predators are responsible for the spring-summer decrease in copepod abundance and that the dominant predator, Pleurobrachia pileus, is associated with high concentrations of copepods were investigated at a station near the Dutch coast. Neither hypothesis was supported. Predators and copepods were sampled together with a 156 L ‘water box’ from late April through early July, including the season of P.pileus abundance. Using predators and copepods from the same box samples, hence from the same water parcel, feeding rates on copepod nauplii and copepodites + adults were measured onboard ship. Less than 6% of the copepods, the sensitivity of the method, were removed per day. In additional shipboard feeding experiments net-caught P.pileus were added to ambient copepod densities. By combining water volume cleared of copepods with ambient P.pileus density in the sea, the predicted impact was 0–1.6% of copepods eaten per day from late April to early July. The hypothesis that P.pileus associates with copepod concentrations was tested by comparing abundances of both groups from the same box samples. The correlations were not significant for any sample series. The ways measurement methods have restricted progress in understanding the predatory impact of Pleurobrachia sp. are also considered.


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


This article has been cited by other articles:


Home page
 J PLANKTON RESHome page
M. A. Pavez, L. R. Castro, and H. E. Gonzalez
Across-shelf predatory effect of Pleurobrachia bachei (Ctenophora) on the small-copepod community in the coastal upwelling zone off northern Chile (23{degrees} S)
J. Plankton Res., February 1, 2006; 28(2): 115 - 129.
[Abstract] [Full Text] [PDF]

Home page
 J PLANKTON RESHome page
D. Thibault-Botha, J. R. E. Lutjeharms, and M. J. Gibbons
Siphonophore assemblages along the east coast of South Africa; mesoscale distribution and temporal variations
J. Plankton Res., September 1, 2004; 26(9): 1115 - 1128.
[Abstract] [Full Text] [PDF]

Home page
 ICES J. Mar. Sci.Home page
H.E. Gonzalez, R. Giesecke, C.A. Vargas, M. Pavez, J. Iriarte, P. Santibanez, L. Castro, R. Escribano, and F. Pages
Carbon cycling through the pelagic foodweb in the northern Humboldt Current off Chile (23{degrees}S)
ICES J. Mar. Sci., January 1, 2004; 61(4): 572 - 584.
[Abstract] [Full Text] [PDF]


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.