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Predator-prey relationship between the cyclopoid copepod Diacyclops bicuspidatus and a free-living bacterivorous nematode

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For more content, see Nematologica.

The potential of copepods as predators of free-living nematodes was tested by presenting Diacyclops bicuspidatus, a common holarctic cyclopoid copepod, with Panagrolaimus sp. as prey in the laboratory. Diacyclops bicuspidatus readily fed on nematodes of all size classes, including prey longer than itself. No size preference was observed. Handling times varied between a few seconds and several minutes, depending on the size of the prey. At different prey densities, the feeding rates of D. bicuspidatus followed a type II functional response. Starved D. bicuspidatus consumed up to 45.1 nematodes in 2 h, equivalent to 43.5% of the copepod's body mass. Indications that nematophagous nutrition is common among freshwater copepods are discussed.

Affiliations: 1: University Bielefeld, Animal Ecology, Morgenbreede 45, 33615 Bielefeld, Germany;, Email: daniel.muschiol@uni-bielefeld.de; 2: University Bielefeld, Animal Ecology, Morgenbreede 45, 33615 Bielefeld, Germany

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/content/journals/10.1163/156854108783360203
2008-01-01
2016-09-26

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