Abstract
Corpuscles of Stannius (CS) from Atlantic salmon ( Salmo salar L.) in various stages of their freshwater spawning journey were examined by light and electron microscopy. The ultrastructural features of the typical columnar parenchymal cell were characteristic of a cell engaged in protein secretion, namely, a large vescular nucleus with dispersed chromatin, numerous secretory franules, a well-developed Golgi complex and an extensive rough-surfaced endoplasmic reticulum. Regressive changes, typified by the presence of clusters of degenerative parenchymal cells, were observed in the CS of all fish examined. There was a direct relation between the extent of glandular regression and the length of time the fish had been in fresh water. These observations support the presently held view that the CS are involved in the production of a proteinaceous hormone active in mineral exeretion, particularly in hypersaline environments.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
