Gonadal Index Of The Freshwater Snail, Bellamya Dissimilis

Molluscs are a part of the invertebrate macro fauna of freshwater habitats throughout the world. Genus Bellamya (family viviparidae) is proven food for many aquatic animals and aquatic birds. The driving force in life cycle of a snail is reproduction. Gonadal index (GI) is which express the relative change in gonad weight to the percentage of the body weight. The healthy and active snails were used for an experiment and GI was estimated. Results shows that GI was maximum in the month of November (0.548), December (0.518), and January (0.485) and minimum in the month of August (0.183) and April (0.198).