Regulation of hibernating periods by temperature.
نویسندگان
چکیده
منابع مشابه
Regulation of body temperature and energy requirements of hibernating alpine marmots (Marmota marmota).
Body temperature and metabolic rate were recorded continuously in two groups of marmots either exposed to seasonally decreasing ambient temperature (15 to 0 degrees C) over the entire hibernation season or to short-duration temperature changes during midwinter. Hibernation bouts were characterized by an initial 95% reduction of metabolic rate facilitating the drop in body temperature and by rhy...
متن کاملEffect of hypothalamic lesions on temperature regulation in hibernating ground squirrels.
The evidence for the importance of the hypothalamus in hibernationin mammals was reviewed recently by Mrosovsky 3. The role played by anterior hypothalamic and preoptic areas in the regulation of body temperature in non-hibernators is well known; a few studies seem to indicate that these areas are important in hibernators as well. Satinoff4, 5 found that ground squirrels, made hypothermic by hy...
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Echidnas (Tachyglossus aculeatus) are amongst the largest deep hibernators, but it is difficult to get them to hibernate normally under laboratory conditions. We measured body temperature (Tb) in 14 free-ranging echidnas using implanted data-loggers. Cooling during entry into hibernation bouts followed a Newtonian cooling curve, and conductances calculated from cooling curves were identical to ...
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Hibernation consists of periods of low metabolism, called torpor, interspersed by euthermic arousal periods. During deep and daily (shallow) torpor, the number of circulating leukocytes decreases, although circulating cells, is restored to normal numbers upon arousal. Here, we show that neutropenia, during torpor, is solely a result of lowering of body temperature, as a reduction of circulating...
متن کاملEndocrine regulation of bone and energy metabolism in hibernating mammals.
Precise coordination among organs is required to maintain homeostasis throughout hibernation. This is particularly true in balancing bone remodeling processes (bone formation and resorption) in hibernators experiencing nutritional deprivation and extreme physical inactivity, two factors normally leading to pronounced bone loss in non-hibernating mammals. In recent years, important relationships...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1965
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.54.4.1044