..., and in many cases swallowing prey whole. In seals, little work has been done to explore the anatomy and function of the UAT in the context of valving mechanisms that function to separate food and air pathways. Here we use videofluoroscopy, gross dissection, histology and computed tomography (CT) renderings...

...Christin T. Murphy; Colleen Reichmuth; David Mann ABSTRACT Prior efforts to characterize the capabilities of the vibrissal system in seals have yielded conflicting results. Here, we measured the sensitivity of the vibrissal system of a harbor seal ( Phoca vitulina ) to directly coupled sinusoidal...

..., arctic ground squirrels that respire at extremely low rates during winter hibernation, seals and whales that undertake breath-hold dives lasting minutes to hours, and naked mole-rats that live in crowded burrows completely underground for their entire lives. These species exhibit remarkable...

... interests. © 2014. Published by The Company of Biologists Ltd 2014 Acoustic telemetry Energetics Hypoxia Logger Penguin Scaling Seal Shark Stroke frequency Temperature The collective term ‘biologging’ has been coined to describe a process by which researchers gain information...

... metabolism. However, in prolonged-fasted, metabolically active elephant seal pups, TH levels are maintained, if not elevated. The functional relevance of this apparent paradox is unknown and demonstrates variability in the regulation of TH levels, metabolism and function in food-deprived mammals. To address...

...Arnoldus Schytte Blix Summary The structural features of the venous system of seals, including such specialties as a caval sphincter, a huge posterior caval vein and hepatic sinuses, venous plexuses and a huge extradural intravertebral vein, are described and functional aspects of these features...

...José Pablo Vázquez-Medina; José Guadalupe Soñanez-Organis; Jennifer M. Burns; Tania Zenteno-Savín; Rudy M. Ortiz SUMMARY Maturation in hooded seals is characterized by the rapid development of their physiological diving capacity and is accompanied by increases in oxidant production...

...Michael John Moore; Terrence Hammar; Julie Arruda; Scott Cramer; Sophie Dennison; Eric Montie; Andreas Fahlman SUMMARY Lung compression of vertebrates as they dive poses anatomical and physiological challenges. There has been little direct observation of this. A harbor and a gray seal, a common...

... the intracellular concentration of myoglobin, the intracellular diffusion coefficient of myoglobin and the intracellular myoglobin oxygen saturation. The review considers the role of myoglobin in oxygen transport in vertebrate heart and skeletal muscle, in the diving seal during apnea as well as the role...

... a predominant role in facilitating O 2 diffusion in seal myocytes ( Lin et al., 2007a ; Ponganis et al., 2008 ). Plants also utilize proteins to facilitate intracellular O 2 transport. Leghemoglobin, a protein similar to myoglobin found in legume root nodules, has a tenfold greater oxygen affinity than...

... in phocid seals ( Halichoerus grypus and Phoca vitulina ). We compared behavioural responses of seals to playbacks of sounds based on a model of sensory unpleasantness for humans, sounds from acoustic deterrent devices and sounds with assumed neutral properties in different contexts of food motivation...

...Björn Mauck; Kerstin Bilgmann; Daryl D. Jones; Ulf Eysel; Guido Dehnhardt SUMMARY Seals have adapted to the high heat transfer coefficient in the aquatic environment by effective thermal insulation of the body core. While swimming and diving, excess metabolic heat is supposed to be dissipated...

...P. J. Ponganis; G. L. Kooyman; M. A. Castellini; E. P. Ponganis; K. V. Ponganis ABSTRACT Locomotory muscle temperature and swim velocity profiles of an adult Weddell seal were recorded over a 21h period. The highest temperatures occurred during a prolonged surface period (mean 37.3°C, S.D. 0.16°C...

..., University of California, Santa Cruz, CA 95064, USA. ‡ Present address: National Marine Fisheries Service, NOAA, 8604 La Jolla Shores Drive, La Jolla, CA 92037, USA. 10 12 1991 © 1992 by Company of Biologists 1992 cardiac output stroke volume dive depth duration seal...