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Raumkonkurrenz bei der Prachtlibelle Calopteryx haemorrhoidalis

Formal Metadata

Title
Raumkonkurrenz bei der Prachtlibelle Calopteryx haemorrhoidalis
Alternative Title
Territorial Competition in the Damselfly Calopteryx haemorrhoidalis
Author
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.
Identifiers
IWF SignatureD 1766
Publisher
Release Date1991
LanguageGerman
Producer
Production Year1989

Content Metadata

Subject Area
Genre
Abstract
German
German
Die Tiere sonnen sich morgens auf Pflanzen an kleinen Fließgewässern der Steinsteppe Crau in Südfrankreich. Im Laufe des Vormittags konkurrieren die Prachtlibellen um Sitzwarten nahe der Wasseroberfläche, um zu jagen. Einzelne Männchen beginnen Territorien zu gründen. Darin begatten sie paarungswillige Weibchen und verjagen nichtfortpflanzungsgestimmte Tiere und Konkurrenten. Am Nachmittag sind deshalb Fortpflanzungs- und Freßgruppen räumlich getrennt. Mit Zeitdehnung.
English
English
The film shows the spatial distribution and the behaviour of the Mediterranean demoiselle Calopteryx haemorrhoidalis on typical reproduction waters. The great importance of suitable perches becomes obvious. These perches, e. g. single rush stems, are used by immature, hunting individuals as well as by reproductive males that are controlling territories from these sites. The latter chase all other individuals, the result being a spatial segregation between immature and reproductive specimens during the day. Typical behaviour, such as threatening, courting, copulation, and oviposition is shown in different film speeds.
Keywords
German
German
English
English
IWF Classification
German
German
English
English