Effect of chronic noise or water restriction on weight of body and organs in the rat.

The effect of either chronic noise or water restriction on body weight gain and weight of several glands and organs has been studied in male Wistar rats. The results indicate that chronic noise does not affect the relative weight of glands and organs but it induces a slight decrease in body weight gain. Water restriction provokes a strong decrease in body weight gain and relative weight of the liver while it increases significantly the relative weight of other glands and organs as a likely consequence of the decrease in body mass. Chronic noise does not seems to be a strong stress and it markedly differs from water restriction which is not appropriate as a model of chronic stress.