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JOURNAL OF PLANKTON RESEARCH | VOLUME 4 | NUMBER 2 | PAGES 237-244 | 1982
© Oxford University Press

research-article

Intersetule distances are a poor predictor of particle-retention efficiency in Diaptomus sicilis1

Henry A. Vanderploeg and Robin L. Ondricek- Fallscheer2

Great Lakes Environmental Research Laboratory, NOAA 2300 Washtenaw Avenue, Ann Arbor, MI 48104, USA

Received on January 1, 1981; accepted on October 1, 1981

In contrast to published results for the copepod Acartia, the cumulative frequency distribution of intersetule distances on the second maxillae of Diaptomus sicilis is a poor predictor of the experimentally determined particle-retention efficiencies of feeding. Moreover, a simple model that includes intersetal retention also does not work. This may be because D. sicilis raptorially seizes particles, as well as filtering them. Also, certain assumptions about the hydrodynamics of the filtering process that are implicit in the intersetule-distance models may be false for Diaptomus and other calanoid copepods whose second maxillae form a stationary filter chamber.

1GLERL Contribution No. 246

2Present address: Department of Biological Sciences, California State University, Chico, CA 95929, USA


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