SEASONAL VARIATION IN THE RESPONSE OF FROG BODY WATER TO PITUITRIN

Abstract

Pituitrin was found to cause Rana pipiens to take up 20% of body wt. of water in non-hibernating and 10% in hibernating seasons in southern Ontario. No extrinsic factor such as storage, light, temp., fatigue, dose of pituitrin or changes in controls, was found responsible for this seasonal variation which was suggested as being associated with the sexual cycle.