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Keywords: Hibernation
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J Exp Biol (2022) 225 (1): jeb229542.
Published: 4 January 2022
...Madeleine S. Junkins; Sviatoslav N. Bagriantsev; Elena O. Gracheva ABSTRACT Hibernators thrive under harsh environmental conditions instead of initiating canonical behavioral and physiological responses to promote survival. Although the physiological changes that occur during hibernation have been...
Journal Articles
J Exp Biol (2021) 224 (17): jeb215764.
Published: 6 September 2021
...Birgitte S. Jensen; Angela Fago ABSTRACT Hibernation is a powerful response of a number of mammalian species to reduce energy during the cold winter season, when food is scarce. Mammalian hibernators survive winter by spending most of the time in a state of torpor, where basal metabolic rate...
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J Exp Biol (2019) 222 (19): jeb196493.
Published: 4 October 2019
.... Here, we propose that induced pluripotent stem cells (iPSCs) from unconventional model organisms may retain certain species-specific features that can consequently be investigated in depth in vitro ; we use hibernating mammals as an example. Many species (including ground squirrels, bats and bears) can...
Journal Articles
J Exp Biol (2019) 222 (4): jeb195750.
Published: 22 February 2019
... of mammalian hibernation. In animals housed at constant ambient temperatures (5°C or 25°C, 12 h:12 h light:dark photoperiod), the volume of this depot increased in the autumn and decreased in the spring, suggesting an endogenous circannual pattern. Water-fat MRI revealed that throughout the year this depot...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (3): jeb194548.
Published: 1 February 2019
...Amanda D. V. MacCannell; Kevin J. Sinclair; Charles A. McKenzie; James F. Staples ABSTRACT Obligate hibernators express circannual patterns of body mass and hibernation, which persist under constant laboratory conditions. Brown adipose tissue (BAT) is important for thermogenesis during arousals...
Journal Articles
J Exp Biol (2018) 221 (Suppl_1): jeb162586.
Published: 7 March 2018
...Mallory A. Ballinger; Matthew T. Andrews; Raul K. Suarez; Hans H. Hoppeler ABSTRACT Brown adipose tissue (BAT) is a unique thermogenic tissue in mammals that rapidly produces heat via nonshivering thermogenesis. Small mammalian hibernators have evolved the greatest capacity for BAT because they use...
Journal Articles
J Exp Biol (2018) 221 (4): jeb174508.
Published: 22 February 2018
...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...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2018) 221 (1): jeb170894.
Published: 4 January 2018
...Shannon E. Currie; Clare Stawski; Fritz Geiser ABSTRACT Many hibernating animals thermoregulate during torpor and defend their body temperature ( T b ) near 0°C by an increase in metabolic rate. Above a critical temperature ( T crit ), animals usually thermoconform. We investigated...
Journal Articles
J Exp Biol (2017) 220 (16): 2939–2946.
Published: 15 August 2017
...Steven J. Swoap; Gerhard Körtner; Fritz Geiser ABSTRACT The eastern pygmy possum ( Cercartetus nanus ) is a small marsupial that can express spontaneous short bouts of torpor, as well as multi-day bouts of deep hibernation. To examine heart rate ( f H ) control at various stages of torpor...
Journal Articles
J Exp Biol (2017) 220 (15): 2748–2756.
Published: 1 August 2017
...Jordan Balaban; Emanuel Azizi ABSTRACT Extended periods of skeletal muscle disuse can cause a significant loss of contractile proteins, which compromises the ability to generate force, mechanical work or power, thus compromising locomotor performance. Several hibernating organisms can resist muscle...
Journal Articles
Journal Articles
J Exp Biol (2017) 220 (7): 1181–1186.
Published: 1 April 2017
... respiratory motor processes following cold-submergence. Unlike mammalian hibernators with unloaded limb muscles and inactive locomotor systems, respiratory mechanics of frogs counterintuitively allow for ventilatory maneuvers when submerged. Thus, we hypothesized that bullfrogs generate respiratory motor...