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Science 23 June 1978:
Vol. 200. no. 4348, pp. 1403 - 1405
DOI: 10.1126/science.200.4348.1403
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Articles

Chemosensory Grazing by Marine Calanoid Copepods (Arthropoda: Crustacea)

S. A. POULET 1 and P. MARSOT 1

1 Institut National de la Recherche Scientifique, INRS—Ocanologie, Rimouski, Québec G5L 3A1, Canada

In laboratory experiments, mixed populations of two marine copepods (Acartia clausi and Eurytemora herdmani) when fed artificial food particles consisting of microcapsules that were either enriched with an encapsulated homogenate of naturally occurring phytoplankton or nonenriched preferentially ingested the enriched capsules. Beads or nonenriched capsules were either seldom ingested or not ingested at all. The observations demonstrate that filter-feeding in these species is a behavioral process, under sensory control, and that the copepods are able to discriminate between enriched and nonenriched food particles.

Submitted on November 9, 1977
Revised on January 9, 1978


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Science. ISSN 0036-8075 (print), 1095-9203 (online)