Abstract :
Reproductive phenomenon in freshwater molluscs is less studied in comparison to marine
ones. Seasonal changes in the oocytes due to maturation of female gametes and onset of breeding
period show some changes. Freshwater bivalve, Lamellidens corrianus showed seasonal
gametogenic changes that depend upon external factors like salinity, light, food and temperature.
Present study highlights the spawning activity of freshwater bivalve, Lamellidens corrianus in
different seasons. In current exploration, specimens were collected in all the three seasons and
studied for micrometric analysis of female gonads to find out the seasonal differences. With the
observation, the author concluded that in Lamellidens corrianus, environmental factors
synchronized the gonadal development at an early stage in the process of adulthood so that spawning
can be coordinated to achieve synchronous release of gametes.
Keyword :
Lamellidens corrianus, Mollusca, Oocytes, Seasonal changes.