Summary
The histology and cytology of the praeoptico-hypophysial system, nucleus tuberis lateralis and subcommissural organ in Gasterosteus aculeatus were analyzed after the fishes had been put in waters of different salinity (see Tables 1–4).
These three structures are all identical in fishes which are accustomed to fresh water and to 32‰ salt-water. A transference to hypertonic water causes changes in the neurosecretory system which suggest the existence of an antidiuretic principle in the neurosecretory substance. No such relationship is found when the fishes are put into hypotonic water. Further, no connection is found between either the secretion production in nucleus tuberis lateralis or in the subcommissural organ and variations in osmotic value.
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Aided by grants from the Swedish Natural Science Research Council.
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Fridberg, G., Olsson, R. The praeoptico-hypophysial system, Nucleus tuberis lateralis and the subcommissural organ of Gasterosteus aculeatus after changes in osmotic stimuli. Zeitschrift füur Zellforschung 49, 531–540 (1959). https://doi.org/10.1007/BF00338863
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DOI: https://doi.org/10.1007/BF00338863