INTRODUCTION 101 TERMINOLOGY OF NUTRmONAL ENERGETICS........................................ 103 Description of Energy Transactions in Animals 104 Expression ofAnimal Energy Requirements and Feed Energy Values 105 BASAL METABOLISM AND MAINTENANCE REQUIREMENTS 106 Sources of Variation in Basal Metabolism................................................... 107 PRODUCTIVE PROCESSES....................

Energy metabolism is the most integral body function, and, as any functional activity, it has an effect on energy expenditure. Body energy expenditures are composed of three unequal parts: basal metabolism, energy supply of functional activity and energy expenditure on growth, development and the adaptive processes. The proportion of these expenditures is determined by the stage of individual d...

Since Gessler (1) reported a seasonal variation of his own standared metabolism in 1924, this problem has been investigated by many authors. Their opinions are, however, not in complete accord with one another. Most of the American authors (e. g. Tilt (2), Benedict and Carpenter (3), Du Bois (4)) support the view that the basal metabolism is almost constant throughout the year, while many Japan...