Temperature regulation in the new-born lamb. III. Effect of environmental temperature on metabolic rate body temperatures, and respiratory quotient

摘要: Studies were made on temperature regulation of lambs in a closed circuit indirect calorimeter. Dry new-born able to maintain normal body ambient temperatures as low -5°C. This was accomplished by increasing heat production 2–3 times "basal" levels, apparently increased oxidation fats, and reducing loss through the extremities vasoconstriction. The lower limit zone thermal neutrality about 29°C. In unsuckled within 24 hr birth, produced response cold appeared be independent pre-natal nutrition age. It considerably with hairy coats than fine coats. Milk intake production, this increase abolished after 12 fasting up 3 days old, but persisted older lambs. accompanied by, due to, elevated from extremities, which even at temperatures. maximal insulation tissues, calculated these results, 1 Clo; that fleece plus air only 2 Clo.