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Dromia vulgaris (Dromiidae) - Kampf um die Tarnbedeckung

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Formal Metadata

Title Dromia vulgaris (Dromiidae) - Kampf um die Tarnbedeckung
Alternative Title Dromia vulgaris (Dromiidae) - Fighting for the Camouflage
Author Schöne, Hermann
License No Open Access License:
German copyright law applies. This film may be used for your own use but it may not be distributed via the internet or passed on to external parties.
DOI 10.3203/IWF/E-896
IWF Signature E 896
Publisher IWF (Göttingen)
Release Date 1965
Language Silent film
Producer Hermann Schöne
Production Year 1964

Technical Metadata

IWF Technical Data Film, 16 mm, 29 m ; SW, 3 min

Content Metadata

Subject Area Life Sciences
Abstract Eine Wollkrabbe ohne Tarnung (Schwammhut) klettert auf die Bedeckung einer anderen und versucht diese umzuklappen. Die angegriffene Krabbe läßt nach dem Umklappen den Schwamm los, den sich der Angreifer aneignet. Der Schwamm wechselt öfter den Besitzer; Abwehrbewegungen außer Ducken und Drohen kommen nicht vor.
Dromia vulgaris (Dromiidae) holds sponges or Ascidia colonies over its body by means of the specialised two last pairs of the cephalothorax appendages. If an uncamouflaged Dromia detects a camouflaged one, it approaches and climbs onto the cover. The camouflaged animal does not defend by means of chelipeds but only ducks in response to the mounting. The uncamouflaged crab climbs over the sponge towards the posterior, lifts the sponge with one claw and squeezes strongly one of the holding legs with its other claw. The assaulted animal moves forward and leaves the sponge loose, which the attacking crab now puts on its back. The film shows how a case changes owner several times. Intraspecific threat and fighting behaviour with the chelipeds as described for other water-living crabs, has not been observed in Dromia up to now.
Keywords Wollkrabbe
Dromia vulgaris
Krabbe / Wollkrabbe
Laufen / Crustacea
Kampfverhalten / Crustacea
fighting behaviour / Crustacea
running / Crustacea
Dromia vulgaris
dromid crab


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