Daily torpor and hibernation in birds and mammals [PDF]
Biological Reviews, 2015 ABSTRACTMany birds and mammals drastically reduce their energy expenditure during times of cold exposure, food shortage, or drought, by temporarily abandoning euthermia, i.e. the maintenance of high body temperatures. Traditionally, two different types of heterothermy, i.e.
Fritz Geiser, Thomas Ruf
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Seasonal Expression of Avian and Mammalian Daily Torpor and Hibernation: Not a Simple Summer-Winter Affair†. [PDF]
Front Physiol, 2020 Daily torpor and hibernation (multiday torpor) are the most efficient means for energy conservation in endothermic birds and mammals and are used by many small species to deal with a number of challenges.
Geiser F.
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Pronounced differences in heart rate and metabolism distinguish daily torpor and short-term hibernation in two bat species. [PDF]
Sci Rep, 2022 Torpor, and its differential expression, is essential to the survival of many mammals and birds. Physiological characteristics of torpor appear to vary between those species that express strict daily heterothermy and those capable of multiday hibernation,
Currie SE, Körtner G, Geiser F.
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Ambient Temperature Cycles Affect Daily Torpor and Hibernation Patterns in Malagasy Tenrecs. [PDF]
Front Physiol, 2020 Hibernation and daily torpor (heterothermy) allow endotherms to cope with demanding environmental conditions. The depth and duration of torpor bouts vary considerably between tropical and temperate climates, and tropical hibernators manage to cope with a
Dausmann KH +3 more
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Central adenosine and daily torpor in mice. [PDF]
Temperature (Austin), 2017 Daily torpor in the mouse is a comprehensive physiological and biochemical suite of changes in response to a caloric deficit and a cool ambient temperature.
Swoap SJ.
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Daily Torpor and Sleep in a Non-human Primate, the Gray Mouse Lemur (Microcebus murinus). [PDF]
Front Neuroanat, 2019 Daily torpor is an energy-saving process that evolved as an extension of non-rapid eye movement (NREM) sleep mechanisms. In many heterothermic species there is a relation between torpor expression and the repartition of the different behavioral states of
Royo J, Aujard F, Pifferi F.
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Hippocampal neuroimmune response in mice undergoing serial daily torpor induced by calorie restriction. [PDF]
Front NeuroanatHibernating animals demonstrate a remarkable ability to withstand extreme physiological brain changes without triggering adverse neuroinflammatory responses.
Cogut V +4 more
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Modulation of Gene Expression in Key Survival Pathways During Daily Torpor in the Gray Mouse Lemur, Microcebus murinus. [PDF]
Genomics Proteomics Bioinformatics, 2015 A variety of mammals employ torpor as an energy-saving strategy in environments of marginal or severe stress either on a daily basis during their inactive period or on a seasonal basis during prolonged multi-day hibernation.
Biggar KK +6 more
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Hypothalamic control systems show differential gene expression during spontaneous daily torpor and fasting-induced torpor in the Djungarian hamster (Phodopus sungorus). [PDF]
PLoS One, 2017 Djungarian hamsters are able to use spontaneous daily torpor (SDT) during the winter season as well as fasting-induced torpor (FIT) at any time of the year to cope with energetically challenging environmental conditions.
Cubuk C, Markowsky H, Herwig A.
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Primate Torpor: Regulation of Stress-activated Protein Kinases During Daily Torpor in the Gray Mouse Lemur, Microcebus murinus. [PDF]
Genomics Proteomics Bioinformatics, 2015 Very few selected species of primates are known to be capable of entering torpor. This exciting discovery means that the ability to enter a natural state of dormancy is an ancestral trait among primates and, in phylogenetic terms, is very close to the ...
Biggar KK +6 more
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