Studies on osmotic balance and its control in the freshwater mollusc parreysia corrugata

Percent increase in body weight of 48 hours cerebralactomized mussels in tap water was significantly higher than in control mussels. 48 hours cerebralactomized mussels, injected with cerebral ganglia homogenate, restored their body weight to the normal level in tap water. 48 hours cerebralactomized mussels injected with saline solution did not show any significant increase in weight.The aminoacid levels were studied by introducing the mussels in different salinities. There was an increase in the amino acid content as the percent salinity increased. Thus it may be inferred that osmotic balance in Parreysia corrugata is controlled both by cerebral neurosecretion and by amino acid levels.