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 Stoecker, D. K.
Right arrow Articles by Sanders, N. K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Stoecker, D. K.
Right arrow Articles by Sanders, N. K.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

JOURNAL OF PLANKTON RESEARCH | VOLUME 7 | NUMBER 1 | PAGES 85-100 | 1985
© Oxford University Press

research-article

Differential grazing by Acartia tonsa on a dinoflagellate and a tintinnid+

Diane K. Stoecker1 and Nancy K. Sanders2,*

1Department of Biology, Woods Hole Oceanographic institution Woods Hole, MA 02543 2Department of Biological Sciences, Northern Arizona University Flagstaff, AZ 86011, USA

Received on March 1, 1984; accepted on October 1, 1984

The calanoid copepod, Acartia tonsa Dana, ingests both the dinoflagellate, Heterocapsa triquetra (Ehrenberg) Stein, and the tintinnid ciliate, Favella sp. In laboratory experiments its ingestion rate increases with increasing dinoflagellate density to a maximum at ~650 cells ml–1, then declines. With Favella as the sole food item, ingestion rate increases up to and possibly above prey densities of 3.4 Favella ml–1. In mixtures of the two prey, the clearance rate of Acartia for Favella decreases with increasing concentration of Heterocapsa. At a Favella concentration of ~1 ml–1 and a Heterocapsa concentration of 280 cells ml–1, Acartia ingests the same biomass of each prey type. The copepods preferentially feed on Favella even when the dinoflagellate is more abundant in terms of carbon and nitrogen than the tintinnid. If the effect of food density on the growth of Favella is considered as well as copepod predation, it is evident that both of these factors, and their interaction, can be important in regulating populations of this ciliate.

+Contribution No. 5292 from the Woods Hole Oceanographic Institution

*Present address: Department of Biology, University of California, Santa Barbara, CA 93105, USA


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. Delgado and M. Alcaraz
Interactions between red tide microalgae and herbivorous zooplankton: the noxious effects of Gyrodinium corsicum (Dinophyceae) on Acartia grani (Copepoda: Calanoida)
J. Plankton Res., December 1, 1999; 21(12): 2361 - 2371.
[Abstract] [Full Text] [PDF]

Home page
 J PLANKTON RESHome page
R. Adrian and B. Schneider-Olt
Top-down effects of crustacean zooplankton on pelagic microorganisms in a mesotrophic lake
J. Plankton Res., November 1, 1999; 21(11): 2175 - 2190.
[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.