Skip Navigation


JPR Advance Access originally published online on November 22, 2005
Journal of Plankton Research 2005 27(10):987-1001; doi:10.1093/plankt/fbi084
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
27/10/987    most recent
fbi084v1
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 (1)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Leising, A. W.
Right arrow Articles by Frost, B. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Leising, A. W.
Right arrow Articles by Frost, B. W.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Published by Oxford University Press 2005.

Copepod foraging and predation risk within the surface layer during night-time feeding forays

Andrew W. Leising1,*, James J. Pierson2, Scott Cary2 and Bruce W. Frost2

1 Noaa, Environmental Research Division, Southwest Fisheries Science Center, 1352 Lighthouse Avenue, Pacific Grove, CA 93950, USA and 2 School of Oceanography, University of Washington, Seattle, WA 98150, USA

* Corresponding Author: andrew.leising{at}noaa.gov

Received June 21, 2005; accepted in principle July 26, 2005; accepted for publication October 7, 2005; published online November 22, 2005
Communicating editor: R.P. Harris

Vertical distribution data seem to indicate that certain species of diel vertical migrating copepods avoid the surface high chlorophyll (Chl) region within coastal and estuarine environments, even during the night. Copepods may avoid this layer to reduce predation mortality, avoid advective loss or to avoid consuming too much toxic algae. We hypothesize that copepods make several intermittent feeding ‘forays’ into shallow surface layers during the night, returning to intermediate depths between forays. Using an individual-based model (IBM) of Calanus pacificus, we examined the implications of this behavior on feeding success and mortality risk, and tested whether a practical field-sampling scheme would be able to detect foray-like behavior. In some cases, mortality of the foray-foraging copepods was up to 50% less than that of randomly behaving controls, for a given amount of food ingested. The trapping scheme devised should be able to detect the occurrence of foray behavior (FB) in the field and should show differences in the gut contents of copepods entering and leaving the uppermost food-rich layer. The presence or absence of foray-like behavior significantly altered the relative concentration of copepods within various surface strata and thus could influence the temporal availability of copepods as prey for the larvae and juveniles of several important managed fish species.

This paper is one of six on the subject of the role of zooplankton predator–prey interactions in structuring plankton communities.


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.