Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Strömungsverhalten von Ephemerella ignita (Ephemeroptera)

Ilse Butz
Oikos
Vol. 24, No. 3 (1973), pp. 469-472
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3543824
Stable URL: http://www.jstor.org/stable/3543824
Page Count: 4
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Strömungsverhalten von Ephemerella ignita (Ephemeroptera)
Preview not available

Abstract

The drifting behaviour of mature nymphs of Ephemerella ignita Poda was observed in a fluviarium. The current resistance is slight. At 7 cm/sec the nymphs moved out of the current, and at 10 cm/sec no movement was possible without drift. The preference for calm water and the characteristic drift behaviour of nymphs in open water, enables this species to inhabit running water. /// В местах с сильным течением наблюдалось пассивное плавательное поведение у нимф Ephemerella ignita Poda. Соротивление течению слабое: при 7 м/сек. нимфы могут активно плавать, при 10 м/сек. движение без сноса невозможно. Предпочтение холодной воды и характерное пассивное плавательное поведение обеспечивают возможность обитания нимф в реках с быстрым течением.

Page Thumbnails

  • Thumbnail: Page 
469
    469
  • Thumbnail: Page 
470
    470
  • Thumbnail: Page 
471
    471
  • Thumbnail: Page 
472
    472