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JPR Advance Access originally published online on April 27, 2004
Journal of Plankton Research 2004 26(8):937-948; doi:10.1093/plankt/fbh087
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Journal of Plankton Research Vol. 26 No. 8 © Oxford University Press 2004; all rights reserved

Calanus the cannibal

Delphine Bonnet1,*, Josefin Titelman1,2 and Roger Harris1

1 Plymouth Marine Laboratory, Prospect Place, Plymouth PL1 3DH, UK 2 Present Address: University of Bergen, Department of Biology, PO Box 7800, N-5020 Bergen, Norway

* Corresponding Author: bode{at}mail.pml.ac.uk

Received December 19, 2003; accepted in principle April 8, 2004; accepted for publication April 15, 2004; published online April 27, 2004

Recent modelling efforts have suggested that cannibalism on eggs and young nauplii is an important factor controlling the population dynamics of Calanus. We measured cannibalistic feeding rates on eggs and nauplii of Calanus helgolandicus in the laboratory. Clearance rates on nauplii were ~102 mL ind.–1 day–1, while generally higher on eggs (320 mL ind.–1 day–1). Female starvation did not affect ingestion rates of eggs. We discuss our results in light of published model predictions, cannibalistic feeding rates of other copepods, and field distributions of Calanus developmental stages.


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