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Heterotrophic protozoa and small metazoa feeding rates and prey-consumer interactions


Heterotrophic protozoa and small metazoa feeding rates and prey-consumer interactions



Journal of Plankton Research 20.1: 121-133



ISSN/ISBN: 0142-7873

DOI: 10.1093/plankt/20.1.121

A common approach to divide zooplankton into groups has been by size or size fractionation (micro-, meso- and macrozooplankton). Whereas almost all zooplankton retained by 200 mu m mesh are metazoa, those not retained are proto- and metazoa. Even so, the variability of major taxa among those retained by 200 mu m mesh can range widely between samples, that of passing 200 mu m can vary even more when considering the grazing impact. If heavily weighted towards protozoa, the 50 mu m super(3) in volume, i.e. those which could be actively perceived. It is hypothesized that in the absence of control by metazooplankton, protozoa control their own abundance by predation/cannibalism.

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Accession: 037344966

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