Hydrobiologia

, Volume 415, Issue 0, pp 13–19 | Cite as

Effects of Cyprinus carpio on Potamogeton pectinatus in experimental culture: the incidence of the periphyton

  • N. S. Sidorkewicj
  • A. C. López Cazorla
  • O. A. Fernández
  • G. C. Möckel
  • M. A. Burgos
Article

Abstract

The effect of one-year-old common carp (Cyprinus carpio L.) on plants and seedlings of Potamogeton pectinatus L., and on periphyton development was studied in 100 l glass aquaria. Two 30-day experiments were conducted using a muddy sediment or a pebbly bottom. In both cases, three treatments based on different fish size (two fish/aquarium) were assayed. The control had no fish. In both experiments, chlorophyll content of the periphyton increased from the beginning to the end of the period, for the three fish treatments. Light attenuation by periphyton was high, with final values 12-30% higher than in the control. Periphytic communities acclimated to reduced light conditions when the bottom was muddy. It can be concluded that, in muddy conditions, small carp affected plant growth by shade stress, which is achieved by a combination of increase in turbidity and the developing of a leaf periphytic cover. Under pebbly conditions, plant damage was caused by collisions and the growth of epiphytic algae. Medium and large fish consumed plants in both experiments. Seedlings were affected by herbivory in all cases.

common carp sago pondweed epiphyton light attenuation 

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • N. S. Sidorkewicj
    • 1
  • A. C. López Cazorla
    • 1
  • O. A. Fernández
    • 1
  • G. C. Möckel
    • 1
  • M. A. Burgos
    • 1
  1. 1.CERZOS and Departamento de AgronomíaUniversidad Nacional del SurBahía BlancaArgentina E-mail

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