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Influence of Gravity on the Maintenance Feed Requirement of Chickens¹

Departments of Animal Physiology and Agricultural Engineering, University of California, Davis, California 95616

The influence of chronic acceleration, simulating an increased gravity, upon maintenance feed requirements was examined in male Leghorn chickens. Maintenance requirements increase arithmetically with field strength up to 2.5 G. The kinetics of this relationship indicate that about 25% of the maintenance requirement under natural conditions is determined by gravity. With increased acceleration, less feed is required per unit of tissue formation, due mainly to a marked decrease in body fat.

Manuscript received 27 May 1970.

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