Fortpflanzung bei Egeln (Hirudinea)

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Formal Metadata

Title
Fortpflanzung bei Egeln (Hirudinea)
Alternative Title
Reproduction in Leeches (Hirudinea)
Author
Westheide, Wilfried
Contributors
Guntram Lotz (Redaktion)
Roland Dröscher (Kamera und Schnitt)
Jürgen Weiss (Kamera)
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
IWF Signature
C 1394
Publisher
IWF (Göttingen)
Release Date
1980
Language
German
Producer
IWF
Production Year
1979

Technical Metadata

IWF Technical Data
Film, 16 mm, LT, 170 m ; F, 15 1/2 min

Content Metadata

Subject Area
Abstract
Erpobdella octoculata (Hundeegel), Piscicola geometra (Fischegel), Theromyzon tessulatum (Entenegel). Die zwittrigen Egel begatten sich gegenseitig durch Übertragung von Spermatophoren. Diese werden auf der Haut des Partners befestigt (Erpobdella, Piscicola) oder in die weibliche Geschlechtsöffnung gedrückt (Theromyzon). Die Eier werden einzeln (Piscicola) oder zu mehreren in die vom Clitellum sezernierten Kokons abgelegt. Theromyzon betreibt Brutpflege.
The film contains characteristic scenes of the reproduction biology of three well-konwon European leeches. First transfer of spermatophores, than formation and deposition of a cocoon with eggs is shown in Erpobdella octoculata. Likewise in Piscicola geometra, copulation with exchange of spermatophores and cocoon deposition were filmed. In Theromyzon tessulatum direct sperm transfer through the female genital pore is preceded by an extensive courtship display. This leech places its body over the cocoons; the juveniles, after hatching, are then sheltered by holding on to the ventral side of the parent.
Keywords
Clitellata
Egel
Entenegel
Theromyzon tessulatum
Fischegel
Piscicola geometra
Hundeegel
Erpobdella octoculata
Spermatophore / Annelida
Kokonbau / Annelida
Brutpflege / Annelida
Fortpflanzung, geschlechtliche / Annelida
Clitellum
clitellum
reproduction, sexual / Annelida
brood care / Annelida
cocoon deposition / Annelida
spermatophore / Annelida
Erpobdella octoculata
dog leech
Piscicola geometra
fish leech
Theromyzon tessulatum
duck leech
leech
Clitellata

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AV-Portal 3.9.2 (c7d7a940c57b22d0bc6d7f70d6f13fde2ef2d4b8)