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  The semipermeability of the pupal cocoon of Rhyacophila (Trichoptera: Spicipalpia)

Wichard, W., Schmidt, H.-H., & Wagner, R. (1993). The semipermeability of the pupal cocoon of Rhyacophila (Trichoptera: Spicipalpia). In C. Otto (Ed.), Proceedings of the 7th International Symposium on Trichoptera (pp. 25-27). Leiden, The Netherlands: Backhuys Publisher.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-C9A2-9 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-C9A3-7
Genre: Conference Paper

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 Creators:
Wichard, Wilfried, Author
Schmidt, Hans-Heinrich1, Author           
Wagner, Rüdiger1, Author           
Affiliations:
1Limnological River Station Schlitz, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976546              

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 Abstract: An osmotic gradient existed between river water and cocoon fluid in Rhyacophila fasciata Hagen pupae. The osmotic concentration was 4-8 mOsmol/l in the cocoon fluid and 2 mOsmol/l in the river water. Because of the gradient of osmotic tension (s = π* -p), water was forced into the cocoon until the osmotic pressure (π*) equalled the turgor pressure (p) of the cocoon membrane (π* = p; s = O). This hyperosmosis in the cocoon fluid was effected by the semipermeability of the cocoon membrane, which always kept the cocoon at its maximum volume.

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Language(s): eng - English
 Dates: 1993
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 237643
Other: 0868
 Degree: -

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Title: 7th International Symposium on Trichoptera
Place of Event: Umeå, Sweden
Start-/End Date: 1992-08-03 - 1992-08-08

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Title: Proceedings of the 7th International Symposium on Trichoptera
Source Genre: Proceedings
 Creator(s):
Otto, Christian, Editor
Affiliations:
-
Publ. Info: Leiden, The Netherlands : Backhuys Publisher
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 25 - 27 Identifier: ISBN: 9073348277