Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"torpor"”.
-
Ecophysiology of Hibernating Eastern Red Bats (Lasiurus Borealis)
Many bats utilize torpor mechanisms to conserve energy during daily rest or seasonal periods of inactivity. Seasonal torpor (hibernation) allows bats to avoid thermoregulatory costs of extreme conditions. Unlike other temperate hibernating bats, eastern red bats (Lasiurus borealis) do not utilize …
-
Ecology and physiology of free ranging black-tailed and Utah prairie dogs
The ability of animals to enter torpor depends upon numerous physiological and environmental factors. Thus, torpor may be influenced by varying climatic conditions over a broad geographic range of a species. Because of their varied geographic distribution and distinct torpor patterns, prairie dogs …
-
Mitochondrial metabolic suppression and reactive oxygen species production during hypometabolism in mammals
During hibernation, daily torpor, and fasting, mammals reduce metabolic rate (MR) up to 99%, 95%, and 30%, respectively, compared to resting levels. Mitochondrial metabolic suppression likely contributes to this MR reduction, and the first objective of this study was to determine the relative …
-
A Preoptic Neurocircuit that Regulates Blood Glucose Homeostasis
… food deprivation, certain endotherms engage in torpor, a behavior in which body temperature and metabolic rate are substantially depressed to improve the probability of organismal survival. Induction of torpor is regulated by anteroventral POA (avPOA) Vglut2⁺/Adcyap1⁺ neurons, which are …
-
Temperature-dependent alterations of brown adipose tissue metabolism during hibernation in the thirteen-lined ground squirrel, <i>Ictidomys tridecemlineatus</i>.
… however, these rates did not differ between torpor and IBE. Contrary to these results, activities of electron transport system enzymes and brown adipocyte respiration did not differ between torpor and IBE, regardless of assay temperature. The data suggest that BAT mitochondria become less …
-
Eastern Pipistrelle (Perimyotis subflavus) Internal Temperature Differences and Sex Ratio in Gorman Cave Hibernaculum
… from 1995-98 addressed different stages of torpor during winter hibernation by eastern pipistrelles. The effects of gender and environmental variables on the internal temperature and sex ratio were assessed. Bats in hibernation are known for leaving and returning to stages of torpor. Gender …
-
Effects of Temperature on Winter Energetics of Female Indiana Bats (Myotis Sodalis)
… temperature fluctuated+- 2°C on a regular basis. Torpor bouts were longest at 4°C, and were not affected by temperature fluctuations. However, the temperature fluctuations appeared to cause longer arousals. The rest of the bats (n = 12) were individually placed in metabolic chambers at 9°, 7°, 5°, …
-
The ecology of eastern small-footed bats at Shenandoah National Park
… eastern small-footed bats. All bats engaged in torpor every day but pregnant and lactating eastern small-footed bats engaged in distinctly different thermoregulatory patterns, in which pregnant bats generally used shallower torpor and shorter torpor periods compared to lactating bats that more …
-
Molecular and Physiological Adaptations to Weight Perturbation in Mice
… phenotypes of weight perturbed to assess whether torpor contributes to metabolic adaptation; and 5) whether changes in gut microbiota accompany changes in diet composition and/or body weight. To assess whether the threshold for defended body weight could be increased or decreased by environmental …
-
Aspects of the energetics and renal physiology of some African arid-adapted rodents
… If food was restricted, G. pusillus utilized torpor to precisely balance energy expenditure with that available and so maintained a constant body mass. During torpor, assimilation efficiency was significantly reduced. The cost of maintaining coenothermia for the full duration of food …
-
The Influence of Reproductive Condition and Roost Type on Thermoregulation and Foraging in Big Brown Bats (Eptesicus Fuscus)
… together, I found that foraging duration and torpor duration were not directly related during pregnancy, but exhibited a slightly inverse relationship during lactation. These data provide support for the hypothesis that the relationship between thermoregulation and foraging is not constant …
-
Ambient Temperature Effects on Metabolism and Body Composition in Torpid Bats (Myotis Lucifugus and Pipistrellus Subflavus)
… result in an increase in metabolic rate during torpor. Without the ability to minimize metabolic needs, irreplaceable energy reserves could become depleted, resulting in death or insufficient energy to reproduce in the spring. To address causation, a study was conducted on ambient temperature …
-
How a Central-Place Forager (Callospermophilus lateralis) Modifies its Movement Behavior to Navigate a Risky Landscape and Maximize Fitness
… of seeds to survive the summer and winter torpor. Unlike their scatter-hoarding and pilfering competitors, C. lateralis larder-hoards seeds year-round in a central burrow. C. lateralis cannot always be at the burrow to defend the larder from pilferers, however, because they must leave to …
-
Where the Dead Remain
… wake of the storm, as he is pulled out of his torpor and into the affairs of the mighty once again. He is tasked with discovering who murdered Dodge Renaud, the fortune god of New Orleans. What he discovers, though, are some surprising truths about the fundamental nature of things: about loss, …
-
The behavioral physiology of labroid fishes
… In the winter, the cunner enters a state of "torpor" which has previously been described based solely on behavioral observations. The present study showed that cunner undergo physiological torpor, or hibernation, based on low oxygen consumption rates in winter, contributing to a large Q10 …
-
Feeding Ecology and Aspects of Life History in <i>Microcebus Rufus</i> (Family Cheirogaleidae, Order Primates)
… common to associate the seasonal fattening and torpor characteristic of some Cheirogaleidae with the markedly seasonal climate and resource availability in west coast dry forests where most studies on cheirogaleids have taken place. Furthermore, primates of small body size are expected to …
-
Hibernation is super complex: dynamics of electron transport system supercomplexes
… respiration. The stability of SCs differed: torpor SCs were most stable. This is the first report of SC changes during hibernation, and the first to demonstrate their dynamics on a short timescale.
-
Arousal patterns, fungal loads, and wing damage in a surviving population of little brown bats (Myotis lucifugus)
… temperature (3.2°C) was unfavorable. The mean torpor bout length (TBL) was similar to bats uninfected by WNS (16.8 days). Fungal loads were near the limit of detection (4.9 genome copies), and mean infection intensity (percent of wing area fluorescence) was low (0.02–0.14%) and much less when …
-
Thermoregulation and behavior of a peripheral population of evening bats (<i>nycticeius humeralis</i>)
… temperature significantly correlated with use of torpor, whereas ambient temperature at sunset of the previous night, temperature at sunrise, amount of precipitation, abundance of insects, roost type, number of roost-mates, reproductive condition, and age did not. An analysis of individuals …
Page 1 of 2