Autecology of Limnomysis benedeni Czerniavsky, 1882 (Crustacea: Mysida) in Lake Constance, Southwestern Germany

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2008
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Gergs, René
Eisele, Isabelle
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Limnologica. 2008, 38(2), pp. 139-146. ISSN 0075-9511. Available under: doi: 10.1016/j.limno.2007.12.002
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The Ponto-Caspian mysid Limnomysis benedeni was first recorded in Lake Constance in summer 2006, and a stable population developed at the site of discovery. Although this mysid is common in the Rhine and Danube rivers, little is known about its ecology and impact in systems of invasion. We investigated the autecology of L. benedeni in habitat-choice and food experiments. In the habitat-choice experiments, highly structured habitats, i.e., stones covered with zebra mussels (Dreissena polymorpha), macrophytes, and especially stonewort, were strongly preferred. In food experiments, L. benedeni fed mostly on food sources with a small particle size, e.g., biofilm on leaf litter, biodeposited material of zebra mussels, epilithon, and phytoplankton. We also compared the L. benedeni population data from Lake Constance with that from rivers. In Lake Constance, female L. benedeni were nearly 30% larger and carried more than three times more eggs in spring (9.4±0.6 mm and 28.4±5.7 eggs) than in summer (6.7±0.8mm and 8.7±2.9 eggs). The mysids present in spring might be the generation that over-wintered; in summer, this generation was probably replaced by a new generation of smaller individuals. The large brood size and the detritivorous feeding strategy might allow L. benedeni to colonize Lake Constance rapidly.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie
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Mysid, Habitat choice, Food preference, Life cycle, Sex ratio, Invasive species, Laboratory experiments
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ISO 690GERGS, René, Almut J. HANSELMANN, Isabelle EISELE, Karl-Otto ROTHHAUPT, 2008. Autecology of Limnomysis benedeni Czerniavsky, 1882 (Crustacea: Mysida) in Lake Constance, Southwestern Germany. In: Limnologica. 2008, 38(2), pp. 139-146. ISSN 0075-9511. Available under: doi: 10.1016/j.limno.2007.12.002
BibTex
@article{Gergs2008Autec-6813,
  year={2008},
  doi={10.1016/j.limno.2007.12.002},
  title={Autecology of Limnomysis benedeni Czerniavsky, 1882 (Crustacea: Mysida) in Lake Constance, Southwestern Germany},
  number={2},
  volume={38},
  issn={0075-9511},
  journal={Limnologica},
  pages={139--146},
  author={Gergs, René and Hanselmann, Almut J. and Eisele, Isabelle and Rothhaupt, Karl-Otto}
}
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