Summary
The cholinesterase (ChE)-activity and the content of gangliosides in the egg yolk and in the brain of rainbow trout was investigated at different development stages.
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1.
The ChE-activity in the egg yolk begins to increase 4 weeks after fertilization, concomitantly with the differentiation of the eyes.
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2.
The specific ChE-activity in the brain increases most markedly after hatching.
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3.
The time course of the increase in ganglioside content in the brain is similar to that of the ChE-activity.
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4.
During the period around hatching the trout brain contains mainly mono- and disialogangliosides.
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5.
More polar high molecular weight sialogangliosides are not synthesized before the young fish becomes mobile.
Zusammenfassung
Die Cholinesterase (ChE)-Aktivität und der Gangliosidgehalt in den Eiern bzw. im Hirn von Regenbogenforellen (Salmo gairdneri) wurde auf verschiedenen Entwicklungsstadien untersucht.
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1.
Die ChE-Aktivität setzt im Fischei 4 Wochen nach der Befruchtung parallel zur Augenentwicklung der Larve ein.
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2.
Die spezifische ChE-Aktivität des Gehirns steigert sich besonders im Anschluß an den Schlüpfvorgang.
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3.
Parallel zum ChE-Anstieg erfolgt die Zunahme der Gangliosid-Konzentration im Forellenhirn.
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4.
Während der perinatalen Entwicklungsphase enthält das Forellenhirn nahezu nur Mono- und Disialoganglioside.
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5.
Erst beim Übergang zum aktiven Schwimmen werden im Forellenhirn zunehmend polare Multisialoganglioside gebildet.
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Breer, H., Rahmann, H. Cholinesterase-Aktivität und Hirnganglioside während der Fisch-Entwicklung. Wilhelm Roux' Archiv 181, 65–72 (1977). https://doi.org/10.1007/BF00857268
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DOI: https://doi.org/10.1007/BF00857268