... ) of eight undisturbed loggerhead turtles in shallow tanks were measured using self-contained ECG data loggers under five conditions: spontaneous dives, resting motionless on the tank bottom, resting in shallow water with their head out of water, feeding on squid, and swimming at the surface between dives...

... breakpoint temperature as the red-blooded Antarctic fish Notothenia coriiceps . Cardiac output Heart rate Stroke volume ECG Warming Sympathovagal balance The notothenioid suborder of fishes that are dominant in the frigid Southern Ocean include the remarkable haemoglobinless (Hb...

...Amanda D. V. MacCannell; Ethan C. Jackson; Katherine E. Mathers; James F. Staples ABSTRACT We used electrocardiogram (ECG) telemeters to measure the heart rate of hibernating Ictidomys tridecemlineatus (thirteen-lined ground squirrel). An increase in heart rate from 2.2 to 5 beats min –1 accurately...

... in a marsupial hibernator, and to see whether f H variability differs from that of deep placental hibernators, we used radiotelemetry to measure ECG and body temperature ( T b ) while measuring the rate of O 2 consumption and ventilation. f H and O 2 consumption rate during euthermia were at a minimum (321±34...

... seals) regulate heart rate ( f H ) while diving. We investigated dive f H in five adult female California sea lions ( Zalophus californianus ) during foraging trips by instrumenting them with digital electrocardiogram (ECG) loggers and time depth recorders. In all dives, dive f H (number of beats...

... for correspondence (e-mail: [email protected] ) 25 4 2007 © The Company of Biologists Limited 2007 2007 power spectral analysis heart rate variability ventilation rate variability ECG To satisfy metabolic demand animals have evolved efficient systems for oxygen uptake from...