The Effects of Zebra Mussels (Dreissena polymorpha) on the Foraging Success of Eurasian Perch (Perca fluviatilis) and Ruffe(Gymnocephalus cernuus)

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2004
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Dieterich, Axel
Mörtl, Martin
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International Review of Hydrobiology. 2004, 89(3), pp. 229-237. ISSN 1434-2944. eISSN 1522-2632. Available under: doi: 10.1002/iroh.200310693
Zusammenfassung

Complex habitat structures can influence the foraging success of fish.Competition for food between fish species can therefore depend on the competitors abilities to cope with structural complexity. In laboratory experiments, we comparatively assessed effects of zebra mussels (Dreissena polymorpha PALL.) on the foraging success of Eurasian perch (Perca fluviatilisL.) and ruffe (Gymnocephalus cernuus(L.)). In single-species and mixed-species experiments, the fish were fed caddisfly larvae (Tinodes waeneri (L.)) over complex (mussel-covered stones) and less-complex (bare stones) substrates. With intraspecific competition, food consumption by perch and ruffe decreased significantly when the complex substrate was used. With interspecific competition, food consumption by perch and ruffe did not change with substrate complexity, but perch clearly out-competed ruffe on both substrates. Zebra mussel beds provide a refuge for macrozoobenthos against predation by ruffe and probably also by perch.

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570 Biowissenschaften, Biologie
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perch, ruffe, zebra mussel, foraging, habitat complexity, limnologicalinstitute
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ISO 690DIETERICH, Axel, Martin MÖRTL, Reiner ECKMANN, 2004. The Effects of Zebra Mussels (Dreissena polymorpha) on the Foraging Success of Eurasian Perch (Perca fluviatilis) and Ruffe(Gymnocephalus cernuus). In: International Review of Hydrobiology. 2004, 89(3), pp. 229-237. ISSN 1434-2944. eISSN 1522-2632. Available under: doi: 10.1002/iroh.200310693
BibTex
@article{Dieterich2004Effec-8106,
  year={2004},
  doi={10.1002/iroh.200310693},
  title={The Effects of Zebra Mussels (Dreissena polymorpha) on the Foraging Success of Eurasian Perch (Perca fluviatilis) and Ruffe(Gymnocephalus cernuus)},
  number={3},
  volume={89},
  issn={1434-2944},
  journal={International Review of Hydrobiology},
  pages={229--237},
  author={Dieterich, Axel and Mörtl, Martin and Eckmann, Reiner}
}
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