Metabolic Rate and Temperature Regulation of Winter Acclimatized Black-Capped Chickadees Parus atricapillus of Interior Alaska

1977 ◽  
Vol 8 (2) ◽  
pp. 127 ◽  
Author(s):  
Andrew F. Grossman ◽  
George C. West
Keyword(s):  
Metabolic Rate ◽  
Temperature Regulation ◽  
Parus Atricapillus ◽  
Interior Alaska

scholarly journals Development of temperature regulation in newborn reindeer

Rangifer ◽  
1981 ◽  
Vol 1 (1) ◽  
pp. 29 ◽  
Author(s):  
R. Hissa ◽  
S. Saarela ◽  
M. Nieminen
Keyword(s):  
Nervous System ◽  
Body Temperature ◽  
Sympathetic Nervous System ◽  
Metabolic Rate ◽  
Heat Production ◽  
Temperature Regulation ◽  
Rangifer Tarandus ◽  
Normal Body Temperature ◽  
Newborn Calves ◽  
Sympathetic Nervous

<p>Development of temperature regulation was investigated by determining the ability of newborn reindeer calves (Rangifer tarandus tarandus) to maintain a normal body temperature when exposed to an incrementially decreasing ambient temperature. Newborn calves (1 day old) can maintain their body temperature even at -15 &deg;C. They can increase their metabolic rate five- to sixfold. Heat production is primarily stimulated by the sympathetic nervous system. The response to exogenous administration of noradrenaline and propranolol was investigated.</p><p>Poronvasan l&aring;mmons&aring;&aring;telyn syntym&aring;nj&aring;lkeinen kehittyminen.</p><p>Abstract in Finnish / Yhteenveto: Vastasyntyneiden poronvasojen kylmansietoa ja lammonsaatelya tutkittiin toukokuussa 1981 Inarin Kaamasessa Paliskuntain yhdistyksen koetarhassa. Tutkittavat vasat olivat 1-10 vuorokauden ikaisia. Vasa asetettiin j&aring;&aring;hdytett&aring;va&aring;n mittauskammioon. Sen aineenvaihdunta, lampotilat niin ihon eri kohdista kuin perasuolesta, lihasvarina ja sydanfrekvenssi rekisteroitiin jatkuvasti. Tulosten mukaan naytt&aring;a silt&aring; kuin 1 vuorokauden ikaiselle vasalle -15 &deg;C olisi ehdoton alaraja l&aring;mpotilan s&aring;&aring;telyssa. Se kykeni kohottamaan hapenkulutusta talloin 5-kertaisesti. Lihasvarinan merkitys on vahainen verrattuna kemialliseen l&aring;mmontuottoon kylmassa. Tama voitiin osoittaa injisoimalla vasaan sympaattisen hermoston valittajaainetta noradrenaliinia.</p><p>Temperaturreguleringens utvikling hos nyf&oslash;dte reinkalver.</p><p>Abstract in Norwegian / Sammendrag: Temperaturreguleringens utvikling er studert ved &aring; bestemme nyf&oslash;dte reinkalvers evne til &aring; opprettholde normal kroppstemperatur under p&aring;virkning av gradvis synkende omgivelsestemperatur. Nyf&oslash;dte kalver (1 d&oslash;gn gamle) kan opprettholde sin kroppstemperatur selv ved -15 &deg;C. De kan &oslash;ke sin omsetningshastighet fem til seks ganger. I starten er varmeproduksjonen stimulert av det sympatiske nervesystem. Virkningen av tilf&oslash;rt noradrenalin og propranolol ble studert og skjelving synes &aring; spille bare en mindre rolle umiddelbart etter f&oslash;dselen.</p>

THE INFLUENCE OF CLIMATE ON METABOLIC AND THERMAL RESPONSES OF INFANT CARIBOU

1961 ◽  
Vol 39 (6) ◽  
pp. 845-856 ◽  
Author(s):  
J. S. Hart ◽  
O. Heroux ◽  
W. H. Cottle ◽  
C. A. Mills
Keyword(s):  
Metabolic Rate ◽  
Heat Loss ◽  
Temperature Regulation ◽  
Weather Conditions ◽  
Wind Chill ◽  
Prediction Of Mortality ◽  
Cold Wind

Metabolic and thermal responses of infant caribou to climate were measured during the June calving period on the barrens in the area of Mosquito Lake and Beverly Lake, N.W.T. It was found that temperature regulation was well established at birth and that the calves were very sensitive metabolically to cold, wind, and precipitation. The metabolic rate was doubled by a lowering of temperature to about 0 °C, but cold combined with wind and precipitation elevated the metabolic rate to over five times the resting value. Calves which were exposed without protection to such conditions eventually became hypothermic and died. Weather conditions during storms on the barrens are sufficiently severe to produce some mortality in animals exposed without protection. The possibilities for prediction of mortality from wind chill values and estimated fur heat loss are discussed.

Metabolism, Water-Balance and Temperature Regulation in the Golden Bandicoot (Isoodon-Auratus)

1992 ◽  
Vol 40 (5) ◽  
pp. 523 ◽  
Author(s):  
PC Withers
Keyword(s):  
Body Temperature ◽  
Water Balance ◽  
Metabolic Rate ◽  
Basal Metabolic Rate ◽  
Temperature Regulation ◽  
Water Loss ◽  
Thermal Conductance ◽  
Evaporative Water Loss ◽  
Evaporative Water ◽  
Low Rate

The Barrow I. golden bandicoot (Isoodon auratus) is a small arid-adapted marsupial. It has a low and labile body temperature, a low basal metabolic rate, a low thermal conductance, and a low rate of evaporative water loss. Its metabolic, thermal and hygric physiology resembles that of another arid-adapted bandicoot, the bilby, and differs from temperate and tropical bandicoots.

Temperature regulation in the new-born lamb. IV. The effect of wind and evaporation of water from the coat on metabolic rate and body temperature

1962 ◽  
Vol 13 (1) ◽  
pp. 82 ◽  
Author(s):  
G Alexander
Keyword(s):  
Metabolic Rate ◽  
Heat Loss ◽  
Heat Production ◽  
Temperature Regulation ◽  
Tap Water ◽  
High Heat ◽  
Cooling Efficiency ◽  
Experimental Conditions ◽  
Ambient Temperatures ◽  
New Born

The study of temperature regulation in new-born lambs has been extended from dry lambs in "still air" at various ambient temperatures to dry lambs in a wind of 550 cm sec-l, and to lambs whose coats are drying. Exposure to wind resulted in an increased slope of the line relating heat production to ambient temperature, but under the experimental conditions evaporation of water from the coat added approximately the same increment at all ambient temperatures. The effects of wind and evaporation at any one temperature appeared additive. The heat loss from naturally wet new-born lambs less than 1 hr old, in a wind, was greater than in slightly older lambs wetted with tap water. Lambs with hairy coats were able to conserve heat more readily than lambs with fine coats. The cooling efficiency of evaporation from the coat was about 25%. The elevation in temperature of the extremities which follows feeding and persists under conditions of moderate heat loss, appears to be almost abolished under conditions of high heat loss. During the studies on drying lambs, beat loss in many lambs exceeded heat production, and rectal temperature fell, which thus indicated the maximum possible heat production (summit metabolic rate) of which lambs are capable. Lambs from ewes on low or medium levels of feeding during pregnancy cooled more readily than lambs from well-fed ewes.

Physiological adjustments of young mean to five-hour desert walks

1976 ◽  
Vol 40 (2) ◽  
pp. 236-242 ◽  
Author(s):  
D. B. Dill ◽  
L. F. Soholt ◽  
I. B. Oddershede
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Body Weight ◽  
Metabolic Rate ◽  
Skin Temperature ◽  
Temperature Regulation ◽  
Tap Water ◽  
Physiological Adjustments ◽  
Subjective Reports ◽  
Cardiovascular Adjustment

Seven young men undertook a desert walk of 30 km at a rate of 100 m/min. Six finished; the seventh stopped after 24 km. Each satisfied his thirst with cool tap water each hour. Periodic observations included metabolic rate, blood pressure, heart rate, rectal and skin temperature, body weight, and volume of water drunk. Hand sweat was collected each hour and body sweat residues on the skin were collected at the end of the walk. Subjective reports revealed portents of breakdown: aching muscles, painful joints, hot or blistered feet, hunger, and boredom. Cardiovascular adjustment and temperature regulation maintained tolerable conditions. The volumes of water evaporated by the 5-h walkers were about the same. Wet bulb temperatures were below 25 degrees C; all sweat evaporated and was available for temperature regulation. The volume of water drawn from body reserves was closely correlated with concentration of chloride in body sweat; the volume of water that satisfied thirst maintained osmotic pressure.

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