Hydractinia echinata (Hydrozoa) - Organisation des Stockes, Nahrungsaufnahme

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Formal Metadata

Title
Hydractinia echinata (Hydrozoa) - Organisation des Stockes, Nahrungsaufnahme
Alternative Title
Hydractinia echinata (Hydrozoa) - Organization of the Colony; Ingestion of Food
Author
Müller, Werner
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
E 2079
Publisher
IWF (Göttingen)
Release Date
1974
Language
Silent film
Producer
IWF
Production Year
1973

Content Metadata

Subject Area
Abstract
Das marine, stockbildende Hydrozoon wächst auf Schneckengehäusen, die von Einsiedlerkrebsen bewohnt sind. Nähr-, Geschlechts-, Tentakel- und Wehrpolypen und ihre Funktionen; entodermales Kanalsystem der Stoffverteilung als Kommunikationssystem des Stockes. Nahrungstransport durch peristaltische Pulsationen.
The colony of the marine hydroid Hydractinia echinata grows symbiontically on shells of hermit crabs. It develops four types of hydranths: gastrozooids, gonozooids, spiralzooids, tentaculozooids. These polyps and their main behavioural reactions are demonstrated. The hydranths represents "organs" of a suprapersonal individual, that is the whole colony, and are interconnected by a system of endodermal channels through which fluid and food are distributed. Pulsations of the hydranths and of the stolonial endodermal tubes provide forces for the transport.
Keywords
Hydroidpolyp
Stachelpolyp
Hydractinia echinata
Organisation / Coelenterata
Nahrungsaufnahme / Coelenterata
ingestion / Coelenterata
organization / Coelenterata
Hydractinia echinata
snail fur
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Version

AV-Portal 3.9.1 (0da88e96ae8dbbf323d1005dc12c7aa41dfc5a31)