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Über Aktivitätsphasen im Epithel des Saccus vasculosus von Etmopterus spinax

Zur Frage der Funktion des Saccus vasculosus der Haie
  • Helmut Altner
Article

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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Copyright information

© Springer-Verlag 1965

Authors and Affiliations

  • Helmut Altner
    • 1
    • 2
  1. 1.Zoologischen Institut der Universität MünchenDeutschland
  2. 2.Biologisk Stasjon EspegrendBergen

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