CS06 Benthos
Date: Friday, June 14, 2002
Time: 10:45:00 AM
Location: Colwood
 
BrendelbergerH, University of Kiel, Zoological Institute, Dept. Limnology, Kiel, Germany, hbrendelberger@zoologie.uni-kiel.de
Weichbrodt, S, , University of Kiel, Zoological Institute, Dept. Limnology, Kiel, Germany, sweichbrodt@zoologie.uni-kiel.de
Loesken, B, , University of Kiel, Zoological Institute, Dept. Limnology, Kiel, Germany, 
 
OMNIVORY OF TWO BENTHIC MACROINVERTEBRATE CRUSTACEANS
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Asellus aquaticus (Isopoda) and Gammarus pulex (Amphipoda) are generally classified as shredders feeding on CPOM. In laboratory experiments we tested survival, growth and body mass index of different size classes (neonates, juveniles, adults) of both species under different food regimes. Foods given alone or in various combinations were unicellular algae, CPOM (maple leaves, macrophytes), FPOM, Feces and animal food (Chironomus sp., Tubifex sp., own and competitor's juveniles). Results show that both species can be considered as simultaneous or life-cycle-omnivores using a much more diverse diet than previously thought.