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Über Aktivitätsphasen im Epithel des Saccus vasculosus von Etmopterus spinax

Zur Frage der Funktion des Saccus vasculosus der Haie

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Summary

The coronet cells in the saccus vasculosus of Etmopterus spinax L. were investigated histologically and histochemically. Inclusions of granula in the coronet cells were observed in 8 specimens. The granules react positivly as lipid and protein containing substances. They are attached to the “Einschlußkörper” in the cell base and accumulate around the nuclei or in the inner fibre apparatus of the cell apex. The diameter of the granules reaches 2,5 μ in the cell base and diminishes to less than 1 μ in the apical structures. These granula are interpreted as a sign of secretion into the third ventricle.

This secretory activity is high in gravid females (31,4–54,7 % of the cells) and low in juvenile females or specimens in which no ovulation could be stated (0–4,7 %). Gravid females show differences in the distribution pattern of the granula within the cells, thus indicating a phasic activity.

The coronet cells in the saccus vasculosus of Etmopterus seem to be involved in the secretory phenomena related to gravidity.

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Authors and Affiliations

  1. Zoologischen Institut der Universität München, Deutschland

    Helmut Altner

  2. Biologisk Stasjon Espegrend, Bergen

    Helmut Altner

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  1. Helmut Altner
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Die Untersuchungen wurden mit dankenswerter Unterstützung durch die Deutsche Forschungsgemeinschaft durchgeführt.

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Altner, H. Über Aktivitätsphasen im Epithel des Saccus vasculosus von Etmopterus spinax . Zeitschrift für Zellforschung 66, 663–672 (1965). https://doi.org/10.1007/BF00339250

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  • DOI: https://doi.org/10.1007/BF00339250

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