Year: 2019, Issue: June
Effect of reproductive cycle on the interrenal activity of a fresh water teleost fish Channa punctatus
Channa punctatus, Sinusoids, Vascularity, Oviparous
This fish is oviparous and breeds once a year during the rainy season (through June-August). Histomorphology of the gonads as well as changes in the interrenal tissue have been studied in this fish during different months of the year. The interrenal tissue in Channa punctatus is situated in the anterior end of the kidney surrounding the posterior cardinal vein and its tributaries, consists of irregular strands of cells. The interrenal tissue could be divide into two phases active and inactive are well differentiated. Active phase is characterized by increased vascularity, homogenous cytoplasm, bigger nuclei and large number of cell layers around sinusoids. In the inactive phase the number of cell layers is less nuclei decrease in size, cytoplasm becomes granulated, vascularity becomes less pronounced and no follicles are seen in the interrenal tissue. The active phase persists through the main reproductive period (June-September in female and May-September in male). It clearly suggests the involvement of interrenal in controlling reproduction. There is a definite role of corticosteroids in reproduction of this teleost.