Daily and seasonal variation in metabolic response to cold during rest and forced exercise in the common redpoll

Pohl, H.; West, George C.

doi:10.1016/0300-9629(73)90088-1

Cited by 92 publications

(50 citation statements)

References 25 publications

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“…We have listed whether heat generated by activity was additive or substitutive and at which temperature substitution first occurred. The two studies on birds indicate partial or complete substitution of exercise-generated heat production for thermoregulatory costs usually at low ambient temperatures and additive at moderately cold ambient temperature (Paladino and King 1984;Pohl and West 1973). In mammals the results are more scattered with cases of total, partial and no substitution (see Table 4).…”

Section: Discussionmentioning

confidence: 99%

Wheel-running activity and energy metabolism in relation to ambient temperature in mice selected for high wheel-running activity

et al. 2006

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Wheel-running activity and energy metabolism in relation to ambient temperature in mice selected for high wheel-running activity Vaanholt, Lobke M.; Garland, Theodore; Daan, Serge; Visser, G. Henk; Garland Jr., Theodore; Heldmaier, G. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date: 12-05-2018Abstract Interrelationships between ambient temperature, activity, and energy metabolism were explored in mice that had been selectively bred for high spontaneous wheel-running activity and their randombred controls. Animals were exposed to three different ambient temperatures (10, 20 and 30°C) and wheelrunning activity and metabolic rate were measured simultaneously. Wheel-running activity was decreased at low ambient temperatures in all animals and was increased in selected animals compared to controls at 20 and 30°C. Resting metabolic rate (RMR) and daily energy expenditure (DEE) decreased with increasing ambient temperature. RMR did not differ between control and selected mice, but mass-specific DEE was increased in selected mice. The cost of activity (measured as the slope of the relationship between metabolic rate and running speed) was similar at all ambient temperatures and in control and selected mice. Heat generated by running apparently did not substitute for heat necessary for thermoregulation. The overall estimate of running costs was 1.2 kJ/km for control mice and selected mice.

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Section: Discussionmentioning

confidence: 99%

Wheel-running activity and energy metabolism in relation to ambient temperature in mice selected for high wheel-running activity

et al. 2006

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“…Increased BMR and M sum in winter for both chickadees and titmice demonstrate that metabolic adaptations are important components of winter acclimatization in these species. BMR varies seasonally in some passerines (Pohl and West 1973;Weathers and Caccamise 1978;Swanson 1991a;Cooper and Swanson 1994;Liknes and Swanson 1996) but not in others (Dawson and Carey 1976;Dawson et al 1985;O'Connor 1995;Sharbaugh 2001).…”

Section: Summit and Basal Metabolic Ratesmentioning

confidence: 92%

“…Small birds meet this energetic challenge primarily through metabolic adjustments (reviews: Dawson and Marsh 1989;Marsh andDawson 1989a, 1989b;Dawson and O'Connor 1996). These metabolic adjustments generally include tolerance of colder temperatures in winteracclimatized birds relative to summer birds (Hart 1962;Barnett 1970;Pohl and West 1973), increased thermogenic endurance in winter birds (Dawson and Carey 1976;Dawson et al 1983;Swanson 1990;O'Connor 1995), and increased summit metabolism (M sum ) in winter birds (Hart 1962;Dawson and Smith 1986;Swanson 1990;Cooper and Swanson 1994;O'Connor 1995;Liknes and Swanson 1996).…”

Section: Introductionmentioning

confidence: 99%

Seasonal Metabolic Acclimatization in Mountain Chickadees and Juniper Titmice

Cooper¹

2002

Physiological and Biochemical Zoology

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Mountain chickadees and juniper titmice from northern Utah were examined to determine metabolic and body-composition characteristics associated with seasonal acclimatization. These species use behavioral adaptations and nocturnal hypothermia, which reduce energetic costs. These adjustments could reduce the need for extensive metabolic adjustments typically found in small passerines that overwinter in cold regions. In addition, these species live at higher altitudes, which may also decrease metabolic acclimatization found in birds. Winter birds tolerated colder test temperatures than summer birds. This improved cold tolerance was associated with an increase in maximal thermogenic capacity or summit metabolism (M sum ). Winter M sum exceeded summer M sum by 26.1% in chickadees and 16.2% in titmice. Basal metabolic rates (BMR) were also significantly higher in winter birds compared with summer birds. Pectoralis wet muscle mass increased 33.3% in chickadees and 24.1% in titmice in winter and paralleled the increased M sum and BMR. Dry mass of contour plumage increased in winter for both species and was associated with decreased thermal conductance in winter chickadees compared to summer chickadees. Chickadees and titmice show metabolic acclimatization similar to other temperate species.

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“…Historically, most research in this field has focused on north-temperate species, which generally increase resting metabolic rates during winter (Pohl 1971;Pohl and West 1973;Rising and Hudson 1974;Swanson 1990;O'Connor 1996).…”

Section: Introductionmentioning

confidence: 99%

Global patterns of seasonal acclimatization in avian resting metabolic rates

2015

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The adjustment of resting metabolic rates represents an important component of avian seasonal acclimatization, with recent studies revealing substantial differences between summer and winter in birds from a wide range of latitudes. We compared seasonal variation in basal metabolic rate (BMR) and summit metabolism (Msum) between temperate and tropical/subtropical latitudes, and examined correlations with latitude and temperature. The direction and magnitude of seasonal adjustments in BMR are broadly related to temperature and latitude, but are significantly more variable among tropical and subtropical species compared to those inhabiting temperate zones. Winter adjustments in BMR among subtropical species, when expressed relative to summer 1 values, range from decreases of approximately 35 % to increases of more than 60 %, whereas the majority of temperate-zone species show increases in BMR during winter. Relatively few seasonal Msum data exist for tropical/subtropical species, but those that are available involve responses ranging from winter decreases to increases of similar magnitude to those characteristic of many temperate-zone species. Recent studies also highlight the substantial variation in seasonal adjustments that may occur within species, and reiterate the need for further investigations of the relative roles of environmental variables such as temperature and food availability as determinants of seasonal metabolic variation.

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Daily and seasonal variation in metabolic response to cold during rest and forced exercise in the common redpoll

Cited by 92 publications

References 25 publications

Wheel-running activity and energy metabolism in relation to ambient temperature in mice selected for high wheel-running activity

Wheel-running activity and energy metabolism in relation to ambient temperature in mice selected for high wheel-running activity

Seasonal Metabolic Acclimatization in Mountain Chickadees and Juniper Titmice

Global patterns of seasonal acclimatization in avian resting metabolic rates

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