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Allometries of the durations of torpid and euthermic intervals during mammalian hibernation: A test of the theory of metabolic control of the timing of changes in body temperature

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Summary

The durations of the intervals of torpor and euthermia during mammalian hibernation were found to be dependent on body mass. These relationships support the concept that the timing of body temperature changes is controlled by some metabolic process. Data were obtained from species spanning nearly three orders of magnitude in size, that were able to hibernate for over six months without food at 5°C. The timing of body temperature changes was determined from the records of copper-constantan thermocouples placed directly underneath each animal. Because all species underwent seasonal changes in their patterns of hibernation, animals were compared in midwinter when the duration of euthermic intervals was short and relatively constant and when the duration of torpid intervals was at its longest. Large hibernators remained euthermic longer than small hibernators (Fig. 2). This was true among and within species. The duration of euthermic intervals increased with mass at the same rate (mass0.38) that mass-specific rates of euthermic metabolism decrease, suggesting that hibernators remain at high body temperatures until a fixed amount of metabolism has been completed. These data are consistent with the theory that each interval of euthermia is necessary to restore some metabolic imbalance that developed during the previous bout of torpor. In addition, small species remained torpid for longer intervals, than large species (Fig. 3). The absolute differences between different-sized species were large, but, on a proportional basis, they were comparatively slight. Mass-specific rates of metabolism during torpor also appear to be much less dependent on body mass than those during euthermia, but the precision of these metabolic measurements is insufficient for them to provide a conclusive test of the metabolic theory. Finally, small species with high mass-specific rates of euthermic metabolism are under tighter energetic constraints during dormancy than large species. The data presented here show that, in midwinter, small species compensate both by spending less time at high body temperatures following each arousal episode and by arousing less frequently, although the former is far more important energetically than the latter.

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References

  • Cranford JA (1983) Body temperature, heart rate and oxygen consumption of normothermic and heterothermic western jumping mice (Zapus princeps). Comp Biochem Physiol 74A:595–599

    Article  Google Scholar 

  • Fisher KC (1964) On the mechanism of periodic arousal in the hibernating ground squirrel. Ann Acad Sci Fenn Ser A 71:143–156

    Google Scholar 

  • Florant GL, Heller HC (1977) CNS regulation of body temperature in euthermic and hibernating marmots (Marmota flaviventris). Am J Physiol 232:R203-R208

    PubMed  CAS  Google Scholar 

  • French AR (1982a) Effects of temperature on the duration of arousal episodes during hibernation. J Appl Physiol: Resp Environ Exercise Physiol 52:216–220

    CAS  Google Scholar 

  • French AR (1982b) Intraspecific differences in the pattern of hibernation in the ground squirrelSpermophilus beldingi. J Comp Physiol 148:83–91

    Google Scholar 

  • Hammel HT, Dawson TJ, Abrams RM, Anderson HJ (1968) Total calorimetric measurements onCitellus lateralis in hibernation. Physiol Zool 41:341–357

    Google Scholar 

  • Henshaw RE (1968) Thermoregulation during hibernation: application of Newton's law of cooling. J Theor Biol 20:79–90

    Article  PubMed  CAS  Google Scholar 

  • Herreid CF (1963) The metabolism of the Mexican free-tailed bat. J Cell Comp Physiol 61:201–207

    Article  PubMed  CAS  Google Scholar 

  • Hock RJ (1951) The metabolic rates and body temperatures of bats. Biol Bull 101:289–299

    CAS  Google Scholar 

  • Hock RJ (1960) Seasonal variations in physiologic functions of arctic ground squirrels and black bears. Bull Mus Comp Zool 124:155–169

    Google Scholar 

  • Kayser C (1940) Les échanges respiratoires des hibernants. Declume, Lons-le-Saunier

    Google Scholar 

  • Kayser C (1950) Le problème de la loi des tailles et de la loi des surfaces tel qu'il apparait dan l'étude de la calorification des Batraciens et Reptiles et des Mammifères hibernants. Arch Sci Physiol 4:361–378

    Google Scholar 

  • Kayser C (1959) Les échanges respiratoires du Hamster ordinaire (Cricetus cricetus) et du Lérot (Eliomys quercinus) en hibernation. CR Séances Soc Biol Fil 153:167–170

    CAS  Google Scholar 

  • Kayser C (1963) Relations entre la température ambiante, la température centrale et le poids et la thermogenèse des hibernants en hibernation profonde. CR Séances Soc Biol Fil 157:2065–2067

    CAS  Google Scholar 

  • Kayser C (1964) La dépense d'énergie des Mammiféres en hibernation. Arch Sci Physiol 18:137–150

    CAS  Google Scholar 

  • Kleiber M (1975) Metabolic turnover rate: a physiological meaning of the metabolic rate per unit body weight. J Theor Biol 53:199–204

    Article  PubMed  CAS  Google Scholar 

  • Morrison PR (1960) Some interrelations between weight and hibernation function. Bull Mus Comp Zool 124:75–91

    Google Scholar 

  • Morrison PR, Ryser FA (1962) Metabolism and body temperature in a small hibernator, the meadow jumping mouse,Zapus hudsonius. J Cell Comp Physiol 60:169–180

    Article  CAS  Google Scholar 

  • Lachiver F, Boulouard R (1967) Évolution de la périodicité des phases de sommeil et de réveil chez le Lérot (Eliomys quercinus) au cours du sommeil hivernal et de la léthargie induite en été. J Physiol (Paris) 59:250–251

    CAS  Google Scholar 

  • Lindstedt SL, Calder WA (1981) Body size, physiological time and longevity of homeothermic animals. Q Rev Biol 56:1–16

    Article  Google Scholar 

  • Pengelley ET, Kelley KH (1966) A “circannian” rhythm in hibernating species of the genusCitellus with observations on their physiological evolution. Comp Biochem Physiol 19:603–617

    Article  PubMed  CAS  Google Scholar 

  • Snapp BD, Heller HC (1981) Suppression of metabolism during hibernation in ground squirrels (Citellus lateralis). Physiol Zool 54:297–307

    Google Scholar 

  • Soivio A, Tähti H, Kristoffersson R (1968) Studies on the periodicity of hibernation in the hedgehog (Erinaceus europaeus L). III. Hibernation in a constant ambient temperature of −5°C. Ann Zool Fenn 5:224–226

    Google Scholar 

  • Tähti H (1978) Seasonal differences in O2 consumption and respiratory quotient in a hibernator (Erinaceus europaeus L). Ann Zool Fenn 15:69–75

    Google Scholar 

  • Torke KG, Twente JW (1977) Behavior ofSpermophilus lateralis between periods of hibernation. J Mammal 58:385–390

    Article  PubMed  CAS  Google Scholar 

  • Twente JW, Twente JA (1965) Effects of core temperature upon duration of hibernation ofCitellus lateralis. J Appl Physiol 20:411–416

    PubMed  CAS  Google Scholar 

  • Twente JW, Twente JA (1968) Effects of epinephrine upon progressive irritability of hibernatingCitellus lateralis. Comp Biochem Physiol 25:475–483

    Article  PubMed  CAS  Google Scholar 

  • Twente JW, Twente JA, Moy RM (1977) Regulation of arousal from hibernation by temperature in three species ofCitellus. J Appl Physiol: Resp Environ Exercise Physiol 42:191–195

    CAS  Google Scholar 

  • Vleck D, Kenagy GJ (1982) Daily temporal organization of metabolism in small mammals: adaptation and diversity. In: Aschoff J, Daan S, Groos G (eds) Vertebrate circadian systems. Springer, Berlin Heidelberg New York, pp 322–338

    Google Scholar 

  • Wang LCH (1979) Time patterns and metabolic rates of natural torpor in the Richardson's ground squirrel. Can J Zool 57:149–155

    Article  Google Scholar 

  • Withers PC, Casey TM, Casey KK (1979) Allometry of respiratory and haemotological parameters of arctic mammals. Comp Biochem Physiol 64A:343–350

    Article  Google Scholar 

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French, A.R. Allometries of the durations of torpid and euthermic intervals during mammalian hibernation: A test of the theory of metabolic control of the timing of changes in body temperature. J Comp Physiol B 156, 13–19 (1985). https://doi.org/10.1007/BF00692921

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  • DOI: https://doi.org/10.1007/BF00692921

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