Changes in the glycogen content of freshwater bivalve Indonaia caeruleus (Prashad, 1918) with injections of cerebral ganglionic extract and equivalent commercial hormones (progesterone and estradiol) during winter season.

We report here the effect of injections of cerebral ganglionic extract and equivalent commercial hormones (Progesterone & Estradiol) on glycogen metabolism of freshwater bivalve molluscIndonaia caeruleus (Prashad, 1918) from Godavari River, as we know the importance ofneuroendocrine control on the metabolic physiology of freshwater bivalves. During winter season, the adult bivalve mollusc, Indonaiacaeruleus (50-55 mm shell length) were subjected tothe five respective experimental groups are as follows- 1) injection of commercial hormone progesterone 2) injection of ganglionic extract 3) injection of sham operation 4) injection ofestradiol and 5) control (normal) for 10 days. The glycogen estimation in bivalves from all four