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Predation by pioneer water beetles (Coleoptera: Dytiscidae) from sandpit ponds based on cropcontent analysis and laboratory experiments

Title data

Kehl, Siegfried ; Dettner, Konrad:
Predation by pioneer water beetles (Coleoptera: Dytiscidae) from sandpit ponds based on cropcontent analysis and laboratory experiments.
In: Archiv für Hydrobiologie. Vol. 158 (2003) Issue 1 . - pp. 109-126.
ISSN 0003-9136
DOI: https://doi.org/10.1127/0003-9136/2003/0158-0109

Abstract in another language

Crop-content analyses of 898 pioneer beetles, belonging to five dytiscid species of sandpit ponds, (Coleoptera: Dytiscidae) were performed to identify possible nutritionally-based niches and competitive effects. Agabus nebulosus, Nebrioporus canaliculatus, Scarodytes halensis, Hygrotus confluens and Hydroglyphus geminus mainly feed on chironomid larvae and planktonic crustacea, especially Copepoda. However, a large amount of filamentous algae was found in the crops of A. nebulosus and H. confluens fed on Rotatoria, especially Keratella, while the small hydroporine H. geminus fed on the small nauplius larvae of Copepoda. Experiments were used to test the relative feeding preference of S. halensis for Copepoda and Cladocera and for dead or living plankton. Dead plankton was preferred, whereas the size of the plankton was important in the selection of Copepoda or Cladocera. The crop clearance times for different food items were also ascertained: no differences in digestion times of chironomid larvae, Chaoborus larvae and plankton were found.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER32484
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Former Professors > Chair Animal Ecology II - Univ.-Prof. Dr. Konrad Dettner
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 11 Sep 2015 06:34
Last Modified: 11 Sep 2015 06:34
URI: https://eref.uni-bayreuth.de/id/eprint/19273