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JPR Advance Access originally published online on March 9, 2004
Journal of Plankton Research 2004 26(5):501-508; doi:10.1093/plankt/fbh055
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Journal of Plankton Research Vol. 26 No. 5 © Oxford University Press 2004; all rights reserved

Peritrich epibiont protozoans in the zooplankton of a subtropical shallow aquatic ecosystem (Monjolinho Reservoir, São Carlos, Brazil)

Mirna H. Regali-Seleghim and Mirna J. L. Godinho

Federal University of São Carlos, Department of Ecology and Evolutionary Biology, Laboratory of Aquatic Microorganisms Ecology, Rodovia Washington Luís, KM 235, 13565–905, São Carlos, SP, Brazil

Corresponding Author: pmhrs{at}iris.ufscar.br

Peritrich epibiont protozoans and metazooplankton (rotifers, cladocerans and copepods) were investigated seasonally in a shallow eutrophic artificial reservoir in a subtropical region (Monjolinho Reservoir, Brazil). The ciliated peritrichs Rhabdostyla sp. and Scyphidia sp. were found to colonize individuals of different metazooplanktonic groups, especially copepods (47.20% of the total number of metazooplanktonic organisms found with epibionts and 57.14% of infection in the copepod population). Copepods also had the greatest epibiont load, followed by cladocerans and rotifers. Rotifers were the most important metazooplanktonic group (90.14% of the total) and the taxa observed with epibionts were Filinia longiseta, Polyarthra, Brachionus and Keratella, with highest preference for the first organism. F. longiseta was present at low density compared with the others and the preference as a substrate for epibionts may be related to its type of adhesion surface (soft) and/or feeding habits (particle feeding).


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