Abstract

METABOLIC adaptations have been shown to occur when chickens and rats are induced to consume their daily rations in a short period of time as compared to ad libitum fed animals (Tepperman and Tepperman, 1958; Cohn and Joseph, 1960; Cohn, 1961; Heggeness, 1961). Rats on limited feeding schedules had lower thyroid activity, more body fat, and a smaller quantity of body protein than those allowed feed ad libitum (Cohn and Joseph, 1960). This was thought to be due to an increased ingestion rate and its effect on intermediary metabolism. The rate of calorie influx probably caused increased hexosemonophosphate activity with resultant increased lipogenesis (Tepperman and Tepperman, 1958). According to Heggeness (1961), metabolic and morphological adaptation by rats to partial quantitative dietary restriction resulted in a temporary increase in rate of gain in body weight and improved efficiency when the animals were returned to ad libitum consumption. Lepkovsky et al. (1960)…

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