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Naturwissenschaften

, Volume 87, Issue 2, pp 90–93 | Cite as

Optimal Area Use in Orb Webs of the Spider Araneus diadematus

  • T. Krink
  • F. Vollrath
SHORT COMMUNICATION

Abstract

 We studied the abilities of the garden cross spider Araneus diadematus regarding adaptation of web geometry to spatial constraints. Spiders reacted to a spatial reduction in their building site from a square-shaped frame to a slimmer, rectangular frame (side ratio 1 : 2) by maintaining overall web geometry while reducing the web area covered by the sticky capture spiral. However, when the frames were changed further to a rectangular side ratio of 1 : 3, the spiders changed specific web properties in such a way that a further reduction in the capture spiral area was prevented. Construction of the threads making up the web frame and the auxiliary spiral requires that the spider explores the spatial constraints of its building site. The geometry of both frame and auxiliary spiral threads in turn determine the geometry of the capture threads. Since in very narrow frames the spider adjusted the auxiliary to suit the subsequent capture spiral, we suggest that an initial spatial survey led to the final adaptation of overall web geometry to a web site.

Keywords

Spatial Constraint Building Site Side Ratio Subsequent Capture Narrow Frame 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • T. Krink
    • 1
  • F. Vollrath
    • 2
  1. 1.Department of Computer Science, Aarhus University, Ny Munkegade B 540, 8000 Aarhus C, Denmark e-mail: krink@daimi. au.dk, Tel.: +45-89-423358, Fax: +45-89-423255)DK
  2. 2.Department of Zoology, South Parks Road, Oxford OX1 3PS, UK

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