Cookies Policy
Cookie Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Untersuchungen Über Die Endopeptidase-Aktivität Des Verdauungssystem Der Höheren Krebse (Malacostraca)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

$30.00+ Tax (if applicable)
Add to Favorites

image of Crustaceana

The pH dependency of the endopeptidase activity in various inland Crustacea was investigated using the method of Anson (1939). In the case of Astacus leptodactylus Eschscholtz the optimum for the homogenised hepatopancreas, the hepatopancreatic juice and the stomach juice was at pH 5.2. The curves for stomach juice and homogenised hepatopancreas break at pH 6. It is suggested that here an unknown endopeptidase may also interfere. In the case of the two Amphipoda - Dicerogammarus haematobaphes balatonicus Ponyi and Gammarus (Rivulogammrus) roeselii var. triacanthus Schaferna - the optimum for the hepatopancreas tubes was identical at pH 6.6-7.1. In contrast to Astacus, here no differences could be detected in the activity curves of the homogenised hepatopancreas and the hepatopancreas juice. Owing to technical difficulties, only the homogenised hepatopancreas was investigated in Asellus aquaticus (L.) and Limnomysis benedeni Czerniavski. The pH optimum was at 5.5-6.0 in Asellus and at 7.3-7.5 in Limnomysis. On the basis of these data it is suggested that the pH dependency of animals living in the same biotope and feeding in the same way is different. On the other hand, in the two phylogenetically closely related Amphipoda it is identical although their food is different.


Article metrics loading...


Affiliations: 1: Biologisches Forschungsinstitut der Ungarischen Akademie der Wissenschaften, Tihany, Ungarn


Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to email alerts
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Crustaceana — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation