Ernährungsbiologie und Nahrungsspektrum der Gerandeten Jagdspinne Dolomedes fimbriatus (Araneae: Pisauridae)
Feeding biology and prey of Dolomedes fimbriatus (Araneae: Pisauridae)
fishing spider; prey; feeding-periods; prey-size; euryphagy; cannibalism
Abstract
In 369 individuals of feeding Dolomedes fimbriatus (all stages/sizes) living in moorlands of Northwestern Germany, field studies were carried out, in particular concerning relations of spider size, kind/size of prey and lurking-site as well. Findings reveal extremely variable food types, depending on seasonal fluctuations of active prey species and of lurking-sites of Dolomedes. Largest prey (relative to spider size) is not captured by the big sized preadults or adults, but by juveniles of 6-9mm length. The prey spectrum comprises also syntopical spiders and opilionids. Surprisingly cannibalism among Dolomedes individuals is rahter requent in spring and autumn and may serve to maintain the population when prey is rare.
Ambros Hänggi, Edi Stöckli & Wolfgang Nentwig: Lebensräume mitteleuropäischer Spinnen. Charakterisierung der Lebensräume der der häufigsten Spinnenarten Mitteleuropas und der mit ihnen vergesellschafteten Arten
book review
Abstract
book review: Ambros Hänggi, Edi Stöckli & Wolfgang Nentwig: Lebensräume mitteleuropäischer Spinnen. Charakterisierung der Lebensräume der der häufigsten Spinnenarten Mitteleuropas und der mit ihnen vergesellschafteten Arten
Verzeichnis der Spinnen (Araneae) des nordwestdeutschen Tieflandes und Schleswig-Holsteins
Checklist of the spiders of North-West-Germany
Araneae; Check list; faunistics; Germany; Lower Saxony; Schleswig-Holstein; Hamburg; Bremen
Abstract
The checklist contains records of spiders from the federal contries Schleswig-Holstein, Hamburg, Bremen and the northern plain of Lower Saxony which are compiled from published data, unpublished papers and personal communications. Among the total of 601 species Gnaphosa leporina, Marpissa nivoyi, Dictyna major, Baryphyma maritium, Pelecopsis nemoraloides, Ozyptila westringi, Silometopus ambiguus and Micaria romana are species which occur in Germany mostly in the north-western region. The species records in the checklist can be related to their informational sources and they can be localised in the TK25-grid, which represents sheets of the 1:25.000 topographical map.

