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Arapaima gigas (Osteoglossidae) - Beutefang


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Formal Metadata

Title Arapaima gigas (Osteoglossidae) - Beutefang
Alternative Title Arapaima gigas (Osteoglossidae) - Catching of Prey
Author Lüling, Karl Heinz
License CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.3203/IWF/E-1692
IWF Signature E 1692
Publisher IWF (Göttingen)
Release Date 1973
Language Silent film
Producer IWF
Production Year 1969

Technical Metadata

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

Content Metadata

Subject Area Life Sciences
Abstract Der Arapaima visiert Beutefische binokular an, bewegt sich entweder auf diese zu oder läßt sie herankommen, öffnet kurz vor dem Beuteobjekt blitzschnell sein sehr spreizbares Maul und saugt die Beute hinein. Manchmal wird die Beute für kurze Zeit in der dehnbaren Rachen-Maulhöhle aufbewahrt. Aufnahme atmosphärischer Luft. Mit Zeitdehnung.
The film shows the capturing of the south American kind of fish Arapaima gigas (Osteoglossidae) with several ways of acting using 24 B /s and 200 B /s. The capture fishes are taken a sight on binocularly. Arapaima rushes to the capture fish (if it is very hungry) or it is swimming quickly but not hasty to the capture or it is waiting if the capture is swimming in the direction of his front body (if it is not hungry). Coming nearer to the capture. A. gigas takes a permanent sight on it binocularly. Shortly before the capture Arapaima gigas stops and opens the mouth very quickly. With the mouth widely opened the capture will be sucked in. The capture will be sucked in in vertical direction or horizontal to the mouth with a more or less strong longitudinal curve. Sometimes the capture fish tries in the last moment as a flight reaction to escape lateral. But in most cases the suction is so strong that the capture fish will be sucked in with a longitudinal curve. With large capture fishes the flexible mouth pharinx will be humped up. With a strong spreading of the operculare and suboperculare the capture will be sucked in completely. Then several swallow movements are following with a slight opening of the mouth. A failed capture is to be seen in which the capture fish is successful in the last moment to escape to be suckled in by a lateral flight reaction.
Keywords Pirarucu
Arapaima gigas
Beuteerwerb / Pisces
prey capture / Pisces
Arapaima gigas

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