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The Rate of Cooling during Torpor Entry Drives Torpor Patterns in a Small Marsupial
Physiological and Biochemical Zoology, 2023AbstractTo maximize energy savings, entry into torpor should involve a fast reduction of metabolic rate and body temperature (Tb); that is, animals should thermoconform. However, animals often defend against the decrease in Tb via a temporary increase in thermoregulatory heat production, slowing the cooling process. We investigated how thermoregulating
Chris B, Wacker, Fritz, Geiser
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Journal of Cellular Physiology, 2012
Mammalian hibernation consists of periods of depressed metabolism and reduced body temperature called torpor that are interspersed by normothermic arousal periods. Numerous cellular processes are halted during torpor, including transcription, translation, and ion homeostasis.
Bouma, Hjalmar R. +7 more
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Mammalian hibernation consists of periods of depressed metabolism and reduced body temperature called torpor that are interspersed by normothermic arousal periods. Numerous cellular processes are halted during torpor, including transcription, translation, and ion homeostasis.
Bouma, Hjalmar R. +7 more
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Public, 2018
Abstract Reflecting Torpordocuments methods, research, and reflections on a performance artwork titledTorpor(Pace Investigations No.5)that was developed on site at the Banff Centre for Art and Creativity by artist Sandrine Schaefer.The text engages ideas and strategies around how the acceleration and deceleration of actions can make ...
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Abstract Reflecting Torpordocuments methods, research, and reflections on a performance artwork titledTorpor(Pace Investigations No.5)that was developed on site at the Banff Centre for Art and Creativity by artist Sandrine Schaefer.The text engages ideas and strategies around how the acceleration and deceleration of actions can make ...
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Hypoglycemia and torpor in Siberian hamsters
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1999We tested whether reduced blood glucose concentrations are necessary and sufficient for initiation of torpor in Siberian hamsters. During spontaneous torpor bouts, body temperature (Tb) decreases from the euthermic value of 37 to <31°C. Among hamsters that displayed torpor during maintenance in a short-day length (10 h light/day) at an air ...
J, Dark, D A, Lewis, I, Zucker
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Nature, 2000
Torpor is a natural state in which animals show a substantial and controlled reduction of body temperature to conserve energy1,2. A few small birds (weighing less than 80 g) are known to use it as a survival strategy in winter, but we have discovered that a large bird, the Australian tawny frogmouth, which weighs 500 g, can also enter this state.
G, Körtner, R M, Brigham, F, Geiser
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Torpor is a natural state in which animals show a substantial and controlled reduction of body temperature to conserve energy1,2. A few small birds (weighing less than 80 g) are known to use it as a survival strategy in winter, but we have discovered that a large bird, the Australian tawny frogmouth, which weighs 500 g, can also enter this state.
G, Körtner, R M, Brigham, F, Geiser
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American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2007
Torpor, a state characterized by a well-orchestrated reduction of metabolic rate and body temperature (Tb), is employed for energetic savings by organisms throughout the animal kingdom. The nucleotide AMP has recently been purported to be a primary regulator of torpor in mice, as circulating AMP is elevated in the fasted state, and administration of ...
Steven J, Swoap +2 more
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Torpor, a state characterized by a well-orchestrated reduction of metabolic rate and body temperature (Tb), is employed for energetic savings by organisms throughout the animal kingdom. The nucleotide AMP has recently been purported to be a primary regulator of torpor in mice, as circulating AMP is elevated in the fasted state, and administration of ...
Steven J, Swoap +2 more
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2011
(Uploaded by Plazi for the Bat Literature Project) This chapter considers the nature and evolution of the process of torpor and hibernation of animals and applies the process to bats. It briefly discusses the equation of energy balance and relates it to the bat's daily activities. It investigates the occurrence of thermal homeostasis and enumerates the
Altringham, John D., Altringham, John D.
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(Uploaded by Plazi for the Bat Literature Project) This chapter considers the nature and evolution of the process of torpor and hibernation of animals and applies the process to bats. It briefly discusses the equation of energy balance and relates it to the bat's daily activities. It investigates the occurrence of thermal homeostasis and enumerates the
Altringham, John D., Altringham, John D.
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1971
It is a curious thing that although lowered body temperature must be among the defining characteristics of mammalian hibernation (see Hoffman, 1964a), it is not so firmly entrenched in the animal’s biology as other aspects of the cycle. Reproductive rhythms (Johnson, Foster, and Coco, 1933) and weight rhythms may persist in hibernating species without ...
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It is a curious thing that although lowered body temperature must be among the defining characteristics of mammalian hibernation (see Hoffman, 1964a), it is not so firmly entrenched in the animal’s biology as other aspects of the cycle. Reproductive rhythms (Johnson, Foster, and Coco, 1933) and weight rhythms may persist in hibernating species without ...
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Torpor and metabolism in hummingbirds
Comparative Biochemistry and Physiology Part A: Physiology, 1982Abstract 1. 1 Body temperature and diurnal cycle of energy metabolism at different ambient temperatures (+2 to +25°C) were tested for 18 different hummingbird species from different biotopes and of different body-masses (2.7–17.5 g). 2. 2.
Kristine Krüger +2 more
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The Function of Torpor in Hummingbirds
Physiological Zoology, 1977We constructed estimates of daily energy budgets for male Eugenes fulgens and female Archilochus alexandri from daily time budgets, energetic rate functions, measurements of food intake, and nocturnal oxygen consumption. These budgets permitted us to examine the relationship between net energy gains and the occurrence of torpor.
F. Reed Hainsworth +2 more
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