... latirostris ) reside exclusively in tropical or subtropical waters. Although potentially providing an energetic benefit through reduced maintenance and thermal costs, little is known about the cascading effects that may alter energy expenditure during activity, dive responses and overall energy budgets...

.... , Williams , T. M. , Kendall , T. and Cuccurullo , V. ( 2012a ). The dive response redefined: underwater behavior influences cardiac variability in freely diving dolphins . J. Exp. Biol.   215 , 2735 - 2741 . 10.1242/jeb.069583 Noren , S. R. , Williams , T. M. , Ramirez , K...

... a strong respiratory sinus arrythmia and an important cardiorespiratory coupling that enhances gas exchange. Diving physiology Marine mammals Cardiac ultrasound Cetaceans Aortic flow Ejection fraction Dive response Respiratory sinus arrythmia Variation in heart rate ( f H ) associated...

...Birgitte I. McDonald; Michael S. Tift; Luis A. Hückstädt; Michael Jeffko; Paul J. Ponganis ABSTRACT The dive response, bradycardia (decreased heart rate) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long-duration dives while actively swimming...

...Birgitte I. McDonald; Mark Johnson; Peter T. Madsen ABSTRACT The dive response, a decrease in heart rate ( f H ) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long-duration dives. This pronounced cardiovascular response to diving has been investigated...

... of Biologists Ltd 2014 Dive response Otariid Electrocardiogram ECG Heart rate f H Resting Pinniped The diving physiology and capabilities of breath-hold divers are crucial to their ability to exploit prey resources, thereby influencing their role in the ecosystem. The dive capacity...

...Shawn R. Noren; Traci Kendall; Veronica Cuccurullo; Terrie M. Williams SUMMARY A hallmark of the dive response, bradycardia, promotes the conservation of onboard oxygen stores and enables marine mammals to submerge for prolonged periods. A paradox exists when marine mammals are foraging underwater...

... that harbour seals meet their ecological needs through repetitive short aerobic dives, we were interested in the functional role, if any, of the dive response during these short dives. During voluntary diving in an 11 m deep tank, the cardiovascular responses to submergence of five harbour seals were...

...P. D. Jobsis; P. J. Ponganis; G. L. Kooyman SUMMARY In several pinniped species, the heart rates observed during unrestrained dives are frequently higher than the severe bradycardias recorded during forced submersions. To examine other physiological components of the classic ‘dive response’ during...

... power output during submergence. Since most voluntary dives are believed to remain aerobic, the goal of this study was to examine the potential importance of the dive response in optimizing the use of blood and muscle oxygen stores during dives involving different levels of muscular exertion...