Summary
The weight-specific oxygen consumption (\(\mathop V\limits^ \bullet _{{\rm O}_2 } \)) of prairie voles caught in winter is 24% higher at 27.5° C and 29% higher at 7.5° C than that of summer animals, thus affording a higher weight-specific thermogenesis in winter than in summer which may allow tolerance to lower thermal exposures. Coincident with the increase in weight-specific rates of oxygen consumption is a decrease in body weight. When total energetic cost to maintain an animal per unit time is calculated, the cost at 27.5° C is the same for both summer and winter animals. Further, the cost to maintain an animal at 7.5° C is less in winter than in summer. Arguments are presented suggesting that prairie voles compensate for increased weight-specific thermogenesis in winter by lowering body weight. The responses to thermal acclimation are quite different in summer and winter animals, thus implying different sorts of metabolic organization. Acclimation to 5° C effects a 26% increase in \(\mathop V\limits^ \bullet _{{\rm O}_2 } \) at 27.5° C of winter voles, and acclimation to 30° C does not change \(\mathop V\limits^ \bullet _{{\rm O}_2 } \). In contrast, \(\mathop V\limits^ \bullet _{{\rm O}_2 } \) at 27.5° C of summer animals is unaffected by 5° C acclimation, and depressed 20% by 30° C acclimation. Thus, the animals are capable of considerable physiological adjustment to varying thermal conditions in different seasons.
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References
Barnett, S.A., Mount, L.E.: Resistance to cold in mammals. In: Thermobiology (A.H. Rose, ed.), pp. 411–477. New York: Academic Press 1967
Barry, W.J.: The effect of photoperiod and temperature on food hoarding in deer mice (Peromyscus). Ph.D. dissertation, Michigan State University (1974)
Bartholomew, G.A.: Body temperature and energy metabolism. In: Animal physiology (M.S. Gordon, ed.), pp. 326–328. New York: Macmillan 1972
Borowski, S.: Variations in the density of coat during the life cycle of Sorex araneus. Acta theriol. 2, 286–289 (1958)
Chaffee, R.R.J., Roberts, J.C.: Temperature acclimation in birds and mammals. Ann. Rev. Physiol. 33, 155–197 (1971)
Cherry, R.H., Verner, L.: Seasonal acclimatization to temperature in the prairie vole, Microtus ochrogaster. Amer. Midl. Naturalist 94, 354–360 (1975)
Costello, D.F.: Vegetation zones in Colorado. In: Manual of the plants of Colorado (H.D. Harrington, ed.). Denver: Sage Books 1954
Dehnel, A.: Studies on the genus Sorex L. Ann. Univ. M. Curie-Sklodowska, Sect. C4. 2, 17–102 (1949)
Didow, L.A., Hayward, J.S.: Seasonal variation in the mass and composition of brown adipose tissue in the meadow vole, Microtus pennsylvanicus. Canad. J. Zool. 47, 547–555 (1969)
Folk, G.E.: Introduction to environmental physiology, p. 308. Philadelphia: Lea & Febiger 1966
Fuller, W.A.: Changes in numbers of three species of small rodent near Great Slave Lake, N.W.T. Canada, 1964–67, and their significance for general population theory. Ann. Zool. Fenn. 6, 113–144 (1969)
Gessaman, J.A.: Ecological energetics of homeotherms: A view compatible with ecological modeling. Monograph Ser., Vol. 20, pp. 1–155. Logan, Utah: Utah State U. Press 1973
Grodzinski, W., Gorecki, A.: Daily energy budgets of small rodents. In: Secondary productivity of terrestrial ecosystems. (K. Petrusewicz, ed.), pp. 295–314. Warszawa-Krakow: Polish Acad. Sci. 1967
Grodzinski, W., Wunder, B.A.: Ecological energetics of small mammals. In: Small mammals: Their productivity and population dynamics (F.B. Golley, K. Petrusewicz, L. Rysezkowski, eds.), pp. 173–204. London: Cambridge Univ. Press 1975
Hart, J.S.: Rodents. In: Comparative physiology of thermoregulation (G. Causey Whittow, ed.), Vol. II, Mammals, pp. 1–149. New York: Academic Press 1971
Heldmaier, G.: The effect of short daily cold exposures on development of brown adipose tissue in mice. J. comp. Physiol. 98, 161–168 (1975)
Heroux, O.: Patterns of morphological, physiological, and endocrinological adjustments under different environmental conditions of cold. Fed. Proc. 22, 789–797 (1963)
Herreid, C.F. II, Kessel, B.: Thermal conductance in birds and mammals. Comp. Biochem. Physiol. 21, 405–414 (1967)
Hill, R.W.: Determination of oxygen consumption by use of the paramagnetic oxygen analyzer. J. appl. Physiol. 33, 261–263 (1972)
Hill, R.W.: Daily torpor in Peromyscus leucopus on an adequate diet. Comp. Biochem. Physiol. 51A, 413–423 (1975)
Hinds, D.S.: Acclimatization of thermoregulation in the desert cottontail, Sylvilagus audubonii. J. Mamm. 54, 708–728 (1973)
Iverson, S.L., Turner, B.N.: Winter weight dynamics in Microtus pennsylvanicus. Ecology 55, 1030–1041 (1974)
Khateeb, A., Johnson, E.: Seasonal changes of pelage in the vole (M. agrestis). I. Correlation with changes in the endocrine glands. Gen. comp. Endocr. 16, 217–228 (1971)
Kleiber, M.: Metabolic turnover rate: A physiological meaning of the metabolic rate per unit body weight. J. theor. Biol. 53, 199–204 (1975)
Lynch, G.R.: Seasonal changes in thermogenesis, organ weights, and body composition in the white-footed mouse, Peromyscus leucopus. Oecologia (Berl.) 13, 363–376 (1973)
Mezhzherin, V.A., Melinkova, G.L.: Adaptive importance of seasonal changes in some morphological indices in shrews. Acta theriol. 1, 503–521 (1966)
Morhardt, J.E.: Body temperatures of white-footed mice (Peromyscus sp.) during daily torpor. Comp. Biochem. Physiol. 33, 423–439 (1970)
Morhardt, J.E., Hudson, J.W.: Daily torpor induced in white-footed mice (Peromyscus spp.) by starvation. Nature (Lond.) 212, 1046–1047 (1966)
Morrison, P., Ryser, F., Dawe, A.: Studies on the physiology of the masked shrew (Sorex cinereus). Physiol. Zool. 32, 256–271 (1959)
Packard, G.C.: Oxygen consumption of Microtus montanus in relation to ambient temperature. J. Mamm. 49, 215–220 (1968)
Rosenmann, M., Morrison, P., Feist, D.: Seasonal changes in the metabolic capacity of red-backed voles. Physiol. Zool. 48, 303–310 (1975)
Scholander, P.E.: Evolution of climatic adaptation in homeotherms. Evolution 9, 15–26 (1955)
Sealander, J.: Survival of Peromyscus in relation to environmental temperature and acclimation at high and low temperatures. Amer. Midl. Naturalist 46, 257–311 (1951)
Sealander, J.: Circum-annual changes in age, pelage characteristics and adipose tissue in the northern red-backed vole in interior Alaska. Acta theriol. 17, 1–24 (1972)
Uresk, B.W., Sims, P.L.: Influence of grazing on crude protein content of blue gramma. J. Range Mgmt. 28, 370–371 (1975)
Wang, L.C.H., Jones, D.L., MacArthur, R.A., Fuller, W.A.: Adaptation to cold: energy metabolism in an atypical lagomorph, the arctic hare (Lepus arcticus). Canad. J. Zool. 51, 841–846 (1973)
Whitney, P.H.: Population biology and energetics of three species of small mammals in the taiga of interior Alaska. Univ. Microfilms, Ann Arbor, Mich. Ph.D. Dissertation, Univ. of Alaska, 254 p. (1973)
Wunder, B.A.: A model for estimating metabolic rate of active or resting mammals. J. theor. Biol. 49, 345–354 (1975)
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Wunder, B.A., Dobkin, D.S. & Gettinger, R.D. Shifts of thermogenesis in the prairie vole (Microtus ochrogaster). Oecologia 29, 11–26 (1977). https://doi.org/10.1007/BF00345359
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DOI: https://doi.org/10.1007/BF00345359