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JPR Advance Access originally published online on September 30, 2004
Journal of Plankton Research 2005 27(1):27-35; doi:10.1093/plankt/fbh147
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Journal of Plankton Research Vol. 27 No. 1 © Oxford University Press 2004; all rights reserved

Sloppy feeding in marine copepods: prey-size-dependent production of dissolved organic carbon

Eva Friis Møller*

National Environmental Research Institute, Department of Marine Ecology, Frederiksborgvej 399, Po Box 358, DK-4000 Roskilde, Denmark and University of Aarhus, Department of Marine Ecology, Finlandsgade 14, DK-8200 Århus, Denmark

* Corresponding Author: eva{at}greibe.dk

Received May 28, 2004; accepted in principle July 16, 2004; accepted for publication September 14, 2004; published online September 30, 2004

An equation predicting dissolved organic carbon (DOC) production by sloppy feeding was developed from literature data on apparent gross growth efficiency and copepod-to-prey size ratio based on the assumption that real gross growth efficiency is independent of relative prey size. The equation suggests that, for copepod-to-prey size ratios <55, DOC production by sloppy feeding can be quantitatively important. It can be calculated as: Q = 0.714 – 0.013 x (ESDcopepod/ESDprey), where Q is the fraction of carbon removed from suspension that is lost as DOC and ESD is equivalent spherical diameter. Predictions by the equation were corroborated by actual measurements of copepod DOC production from the literature.


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