Entwicklung von Sagitta (Chaetognatha)

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Formal Metadata

Title
Entwicklung von Sagitta (Chaetognatha)
Alternative Title
Development of Sagitta (Chaetognatha)
Author
Kuhl, Willi
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
D 1058
Publisher
IWF (Göttingen)
Release Date
1971
Language
German
Producer
Willi Kuhl
Gertrud Kuhl
Production Year
1964

Technical Metadata

IWF Technical Data
Film, 16 mm, LT, 100 m ; SW, 9 1/2 min

Content Metadata

Subject Area
Abstract
Pfeilwurm. Bewegung des gesamten Tieres, der Spermatozoen und deren Eindringen in das Receptaculum seminis. Ablage und Entwicklung der Eier, totaläquale Furchung, Austritt von vier Urgeschlechtszellen während der fünften bis siebten Teilung. Gastrulation durch Invagination. Zurückdrängen des Blastocoels durch Vergrößerung des Urdarmlumens. Verschluß des Urmundes (Deuterostomia).
The film shows the motion behaviour of the Sagitta setosa Mueller, the movement of the sperms and their penetration into the receptaculum seminis. Segmentation and gastrulation in the Sagitta setosa are shown from the animal pole and in profile several times in slow-motion and the closure of the blastopore is presented. A film of the segmentation and gastrulation of the ovum of the Sagitta elegans arctica Aurv., and her larvae are shown for purposes of comparison.
Keywords
Wurm / Pfeilwurm
Pfeilwurm
Sagitta
Eiablage / Chaetognatha
Larven / Chaetognatha
Gastrulation
Furchung / Chaetognatha
cleavage / Chaetognatha
gastrulation
larvae / Chaetognatha
oviposition / Chaetognatha
Sagitta
arrow worm
worm / arrow worm
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Timings

  362 ms - page object

Version

AV-Portal 3.9.1 (0da88e96ae8dbbf323d1005dc12c7aa41dfc5a31)