ECG
- Activity, not submergence, explains diving heart rates of captive loggerhead sea turtles
Highlighted Article: Heart rates of undisturbed loggerhead sea turtles were not different whether turtles were submerged or out of water. Rather, heart rates changes were driven by turtles' activity level.
- Exploring nature's natural knockouts: in vivo cardiorespiratory performance of Antarctic fishes during acute warming
Summary: Routine cardiac output in the haemoglobinless icefish Chaenocephalus aceratus is lower than previously reported; they have a large cardiorespiratory scope during acute warming and activity, and show the same cardiac breakpoint temperature as the red-blooded Antarctic fish Notothenia coriiceps.
- An improved method for detecting torpor entrance and arousal in a mammalian hibernator using heart rate data
Summary: An increase in heart rate detects arousal from torpor long before body temperature changes in Ictidomys tridecemlineatus. Digitally filtered (Butterworth) heart rate data also detect entrance into torpor before body temperature changes.
- Heart rate dynamics in a marsupial hibernator
Summary: Control and function of the cardiac system in the eastern pygmy possum during deep torpor is indistinguishable from that of a placental hibernator, and its dynamic heart rate range is one of the greatest measured to date at ∼600 beats min−1.