Relevant bibliographies by topics / Torpor metabolic rate

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Academic literature on the topic 'Torpor metabolic rate'

Author: Grafiati
Published: 7 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "Torpor metabolic rate"

1

Geiser, Fritz, Shannon E. Currie, Kelly A. O'Shea, and Sara M. Hiebert. "Torpor and hypothermia: reversed hysteresis of metabolic rate and body temperature." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 307, no. 11 (2014): R1324—R1329. http://dx.doi.org/10.1152/ajpregu.00214.2014.

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Regulated torpor and unregulated hypothermia are both characterized by substantially reduced body temperature (Tb) and metabolic rate (MR), but they differ physiologically. Although the remarkable, medically interesting adaptations accompanying torpor (e.g., tolerance for cold and ischemia, absence of reperfusion injury, and disuse atrophy) often do not apply to hypothermia in homeothermic species such as humans, the terms “torpor” and “hypothermia” are often used interchangeably in the literature. To determine how these states differ functionally and to provide a reliable diagnostic tool for
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Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

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(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp
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3

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

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Abstract:
(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp
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4

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

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Abstract:
(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp
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5

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

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Abstract:
(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp
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6

Withers, PC, KC Richardson, and RD Wooller. "Metabolic Physiology of Euthermic and Torpid Honey Possums, Tarsipes-Rostratus." Australian Journal of Zoology 37, no. 6 (1989): 685. http://dx.doi.org/10.1071/zo9890685.

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Euthermic honey possums have a higher body temperature (Tb), basal metabolic rate and wet thermal conductance than other marsupials of similar mass. Honey possums enter torpor when cold-stressed and deprived of food. The pattern of decline in body temperature and oxygen consumption during torpor generally resembles that of other heterothermic endotherms. The duration of torpor bouts in honey possums was about 10 h; torpor bouts longer than one day were not observed. The Tb declined during torpor to within 1-2�C of ambient temperature (Ta>5�C) and oxygen consumption rate declined dramaticall
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7

Heldmaier, Gerhard, Martin Klingenspor, Martin Werneyer, Brian J. Lampi, Stephen P. J. Brooks, and Kenneth B. Storey. "Metabolic adjustments during daily torpor in the Djungarian hamster." American Journal of Physiology-Endocrinology and Metabolism 276, no. 5 (1999): E896—E906. http://dx.doi.org/10.1152/ajpendo.1999.276.5.e896.

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Djungarian hamsters ( Phodopus sungorus) acclimated to a short photoperiod (8:16-h light-dark cycle) display spontaneous daily torpor with ad libitum food availability. The time course of body temperature (Tb), metabolic rate, respiratory quotient (RQ), and substrate and enzyme changes was measured during entrance into torpor and in deep torpor. RQ, blood glucose, and serum lipids are high during the first hours of torpor but then gradually decline, suggesting that glucose is the primary fuel during the first hours of torpor, with a gradual change to lipid utilization. No major changes in enzy
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8

Soto, Marion, Lucie Orliaguet, Michelle L. Reyzer, M. Lisa Manier, Richard M. Caprioli, and C. Ronald Kahn. "Pyruvate induces torpor in obese mice." Proceedings of the National Academy of Sciences 115, no. 4 (2018): 810–15. http://dx.doi.org/10.1073/pnas.1717507115.

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Mice subjected to cold or caloric deprivation can reduce body temperature and metabolic rate and enter a state of torpor. Here we show that administration of pyruvate, an energy-rich metabolic intermediate, can induce torpor in mice with diet-induced or genetic obesity. This is associated with marked hypothermia, decreased activity, and decreased metabolic rate. The drop in body temperature correlates with the degree of obesity and is blunted by housing mice at thermoneutrality. Induction of torpor by pyruvate in obese mice relies on adenosine signaling and is accompanied by changes in brain l
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9

Song, X., G. K�rtner, and F. Geiser. "Reduction of metabolic rate and thermoregulation during daily torpor." Journal of Comparative Physiology B 165, no. 4 (1995): 291–97. http://dx.doi.org/10.1007/bf00367312.

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10

Keicher, Lara, J. Ryan Shipley, Ewa Komar, Ireneusz Ruczyński, Paul J. Schaeffer, and Dina K. N. Dechmann. "Flexible energy-saving strategies in female temperate-zone bats." Journal of Comparative Physiology B 192, no. 6 (2022): 805–14. https://doi.org/10.5281/zenodo.13535733.

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(Uploaded by Plazi for the Bat Literature Project) Torpor is characterized by an extreme reduction in metabolism and a common energy-saving strategy of heterothermic animals. Torpor is often associated with cold temperatures, but in the last decades, more diverse and flexible forms of torpor have been described. For example, tropical bat species maintain a low metabolism and heart rate at high ambient and body temperatures. We investigated whether bats (Nyctalus noctula) from the cooler temperate European regions also show this form of torpor with metabolic inhibition at high body temperatures
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Books on the topic "Torpor metabolic rate"

1

Clarke, Andrew. Torpor and hibernation. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199551668.003.0011.

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A diurnal (circadian) rhythm in body temperature is a widespread, and possibly universal, feature of endotherms. Some mammals and birds down-regulate their metabolic rate significantly by night, allowing their body temperature to drop sufficiently that they become inactive and enter torpor. Both the minimum temperature achieved and the duration of torpor are highly variable. Daily torpor is principally a response to reduced energy intake, and a drop in ambient temperature. Hibernation is essentially an extreme form of torpor. Small mammals hibernating at high latitudes have regular arousals du
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Book chapters on the topic "Torpor metabolic rate"

1

Tattersall, Glenn J. "Diurnal Changes in Metabolic Rate in Pygmy Marmosets: Implications for Sleep, Torpor, and Basal Metabolism in Primates." In Living in a Seasonal World. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28678-0_41.

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2

Geiser, Fritz. "Energetics, Thermal Biology, and Torpor." In Functionaland Evolutionary Ecology of Bats. Oxford University PressNew York, NY, 2006. http://dx.doi.org/10.1093/oso/9780195154726.003.0001.

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Abstract Although most Australian bats have been isolated from bat species in other parts of the world for prolonged periods and may functionally differ, little detailed research has been conducted to determine how Australian bats cope with seasonal and short-term food shortages and adverse environmental conditions. This chapter provides a comparative summary about the limited information on the thermal biology and energetics of Australian bats. The data suggest that, in general, Australian bats are similar in their thermal characteristics and energy use to other bats. Thermal conductance of A
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3

Willis, Craig K. R. "Daily Heterothermy by Temperate Bats Using Natural Roosts." In Functionaland Evolutionary Ecology of Bats. Oxford University PressNew York, NY, 2006. http://dx.doi.org/10.1093/oso/9780195154726.003.0003.

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Abstract Periods of heterothermy, or torpor, can save mammals and birds substantial amounts of energy. Temperate-zone insect-eating bats often use torpor to accommodate the thermoregulatory challenges associated with their large surface area to volume ratio and dependence on food that fluctuates within and between seasons. Torpor associated with hibernation has been well studied, but heterothermy during summer has received less attention, especially in free-ranging bats. Roosting ecology almost certainly influences patterns of daily heterothermy, but, to date, the majority of studies have focu
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4

Mcnab, Brian K., and Frank J. Bonaccorso. "The energetics of pteropodid bats." In Ecology, Evolution and Behaviour of Bats. Oxford University PressOxford, 1995. http://dx.doi.org/10.1093/oso/9780198549451.003.0007.

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Abstract The temperature regulation and energetics of pteropodid bats are highly variable. Their thermoregulation is effective in species that weigh more than 60 g, but smaller species often exhibit imprecise regulation at cool environmental temperatures. The smallest nectarivores usually maintain a small temperature differential with the environment, especially at low altitudes. Nectarivores either regulate body temperature at high altitudes or are limited in distribution to lowlands. Basal rate in pteropodids varies with body size, with the propensity to enter torpor and with the size of the
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Buskirk, Steven W. "Physiological ecology." In Carnivoran Ecology. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/oso/9780192863249.003.0004.

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Abstract Physiological ecology deals with how processes at cellular and molecular levels relate to ecological challenges. Carnivorans occupy the widest range of habitat and trophic niches of any mammalian order, variously specializing on vertebrate flesh, insects, fruits, and plant leaves. Carnivorous carnivorans eat less frequently than herbivores, retain food in their guts for briefer periods, and lack the genes that code for proteins that regulate appetite in response to gut contents. Carnivorans, even those with high-cellulose diets, lack special gut structures to hold microbial fermenters
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