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Population Density, Biomass and Calorific Values of Freshwater Bivalve, Parreysia favidens (Benson) of Kosi River Basin, North Bihar, India

Freshwater bivalves, which are an important component of the macroinvertebrate fauna, play a very significant role in the trophic dynamics of the ecosystem. They occupy almost a middle position in the food chain and transfer energy from primary producers to the consumers of higher order at secondary productivity level. Because of this, it is extremely important to assess their density, biomass and calorific values in order to understand their specific role in the energy dynamics of the ecosystem.