Ultrastructure of the Corpuscles of  Stannius in a Freshwater and Sea Water  Fish

Pruthvi raj C.Bedjargi; Nagaveni P.Bedjargi; R.S.Kulkarni

Volume : III, Issue : III, March - 2014

Ultrastructure of the Corpuscles of Stannius in a Freshwater and Sea Water Fish

Pruthvi Raj C. Bedjargi, Nagaveni P. Bedjargi, R. S. Kulkarni

Abstract :

The corpuscles of Stannius (CS) of two species of fish having different habitat has been compared under electron microscopic observation. The two species of fish are; a freshwater fish, Notopterus notopterus and Indian marine mackerel fish Rostragellar kanagurta. The ultrastructural study of corpuscles of Stannius in two representative fishes collected from freshwater and sea water indicates that although three types of cells noticed in freshwater fish, N. notopterus predominantly one type of cell (type–I) is active having abundant secretary granules along with all characteristic of cytoplasmic hyper condition including large number of vacuoles. Similarly in the marine fish, R. kanagurta although single type of cell identified similar to type–I cells of freshwater fish exhibiting all characteristic of active cell, the other type of cells are not a abundance. However, in both the fishes a single type of cell (type–I cell) is active and probably involved in calcium homeostersis. The studies indicates that the corpuscles of Stannius in the freshwater fish, Notopterus notopterus has three types of cells and amongst them one type (type–I) is predominent a found to be active.