... of thermoneutrality ( T uc ) varied by >20°C and maximum RMR during acute heat exposure scaled to M b 0.75 in both the overall data set and among passerines. The slope of RMR at T a > T uc increased significantly with M b but was substantially higher among passerines, which rely on panting, compared...

...Caleb L. Loughran; Blair O. Wolf ABSTRACT Because most desert-dwelling lizards rely primarily on behavioral thermoregulation for the maintenance of active body temperature, the effectiveness of panting as a thermoregulatory mechanism for evaporative cooling has not been widely explored. We measured...

... to increase evaporative heat dissipation when body temperature ( T b ) approached 41.5°C in response to increasing T a , with gular flutter observed in cuckoos and panting in rollers and starlings. Resting metabolic rate and evaporative water loss increased by quantitatively similar magnitudes in all three...

... ( T brain ) rose from 38.5±0.1°C at 10°C to 39.5±0.2°C at 50°C, while f increased from ×7 to ×250 breaths min –1 , with a change to open-mouth panting (OMP) at T brain 39.0±0.1°C, and carotid and sublingual arterial flows increased by 160% and 500%, respectively. OMP caused jugular venous and carotid...

... for controlling or modifying T b . * Author for correspondence (e-mail: [email protected] ) 30 6 2005 © The Company of Biologists Limited 2005 2005 body temperature evaporative heat loss hypoxia panting reptile set-point sex differences thermoregulation The bearded dragon...