1. 1.|The maximum thermoregulatory increase in heat production (HP) of defeathered laying hens exceeded that of the feathered ones at thermoneutral temperatures by 238%. 2. 2.|The HP of laying hens is an appropriate physiological parameter to calculate the total effective ambient temperature (Ta). 3. 3.|The cold sensitivity of the thermoregulatory system in laying hens was determined by three different methods (a) from the relationships between Taand HP in well feathered birds in the range 5 to 25°C; (b) fromm the relationships between Taand HP in defeathered hens in range 20 to 40°C; (c) from the relationships between Taand HP in the total effective ambient temperature range (EAT1)(-15 to -18°C) and was found to be about -3,2 W kg-1. © 1986.
Mendeley saves you time finding and organizing research
Choose a citation style from the tabs below