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Limnische Muscheln
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ISBN10: 6208306337
ISBN13: 9786208306335
Publisher: Verlag Unser Wissen
Published: Nov 19 2024
Pages: 108
Weight: 0.37
Height: 0.26 Width: 6.00 Depth: 9.00
Language: German
ISBN13: 9786208306335
Publisher: Verlag Unser Wissen
Published: Nov 19 2024
Pages: 108
Weight: 0.37
Height: 0.26 Width: 6.00 Depth: 9.00
Language: German
Die limnischen Muscheln oder Najaden der Ordnung Unionoida stellen mit sechs Familien, 181 Gattungen und 800 Arten die grö te Gruppe der Sü wassermuscheln dar. Sie kommen auf allen Kontinenten vor und sind derzeit die am stärksten vom Aussterben bedrohte Gruppe von Sü wassertieren. Die dramatischste Ursache für den Rückgang und das Aussterben der Sü wassermuscheln ist die Veränderung und Zerstörung ihres Lebensraums, der globale Klimawandel und die Einführung exotischer (nicht einheimischer) Wassertiere. Dieses Taxon ist das einzige Mitglied der Klasse der Muscheln (Bivalvia), das ein parasitäres Larvenstadium in seinem Lebenszyklus aufweist, das eine obligatorische Beziehung zu einem Wirbeltierwirt, in der Regel ein Fisch, und eine stark modifizierte Larve, die Gloquide oder Laside, beinhaltet. Dieses Merkmal des Lebenszyklus ist ein Schlüsselelement eines jeden Erhaltungsplans für limnische Muscheln. Um Arten zu vermehren, die vom Aussterben bedroht sind, sollten praktikable Techniken entwickelt werden, um Jungtiere im Labor durch die künstliche Kultivierung (in vitro) von Gloquiden zu erhalten.
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