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Predator–prey interactions between Dugesia gonocephala and free‐living nematodes by S. Beier; M. Bolley; W. Traunspurger is a Environmental Science article available to read on EtoBox.

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## Summary 1. Three groups of laboratory experiments clarified the role of nematodes as a potential food resource for the triclad __Dugesia gonocephala__. The first group measured the functional response of adult __D. gonocephala__ feeding on juvenile or adult __Caenorhabditis elegans__. The feeding rates of __D. gonocephala__ on adult and juvenile __C. elegans__ followed a type II functional response. The maximum number of adult nematodes and juvenile nematodes eaten by a single __D. gonocephala__ individual within 3 h was 94 and 197 nematodes, respectively. 2. A second group of microcosm experiments investigated the effect of __D. gonocephala__ on the density and the vertical distribution of a nematode community in fine sand. The following treatments were performed: (i) microcosms with 400 nematodes and (ii) microcosms with 400 nematodes and one __D. gonocephala__. After 5 days, nematodes as a group, as well as the dominant species __Tobrilus pellucidus__ and __Trischistoma monohystera__, showed no significant difference in vertical patterns between the treatments with and without __D. gonocephala__. 3. The third group of experiments determined whether grain size of the sediment

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Author

S. Beier; M. Bolley; W. Traunspurger

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0046-5070)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)