Seasonal variation in the resting metabolic rate of male wood mice Apodemus sylvaticus from two contrasting habitats 15 km apart

N Corp, Martyn Lee Gorman, John Roger Speakman

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Diurnal and nocturnal resting metabolic rates of winter- and summer-acclimatized adult male wood mice Apodemus sylvaticus from two adjacent populations, 15 km apart, were measured. One population lived in deciduous woodland, and experienced a narrower daily range of temperatures than the second population, which inhabited maritime sand-dunes. Ambient temperature and body mass had significant effects on the resting metabolism of mice, excluding winter-acclimatized sand-dune animals where only temperature explained significant amounts of the observed variation. Only in this latter group could a thermoneutral zone be determined, with a lower critical temperature of ca. 25 degrees C and resting metabolism of 0.155 W. Nocturnal resting metabolic rates were significantly greater than diurnal levels. Winter acclimatization was associated with reductions in thermal conductance and resting metabolism, thus minimizing energy expenditure at rest. Site differences in thermoregulatory strategies were only found in winter, thermal conductances remained similar but mice from the sand-dunes had significantly lower metabolic rates than those from the woodland. Winter acclimatization in wood mice was influenced by factors in addition to photoperiod. Intra-specific and individual variations in resting metabolism, as shown in this study, potentially have a pronounced effect on the daily energy expenditure of a free-living animal.

Original languageEnglish
Pages (from-to)229-239
Number of pages11
JournalJournal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Volume167
Issue number3
Publication statusPublished - Apr 1997

Keywords

  • seasonal acclimatization
  • intraspecific variation
  • wood mouse, Apodemus sylvaticus
  • brown adipose-tissue
  • Djungarian hamster
  • nonshivering thermogenesis
  • peromyscus-leucopus
  • energy-metabolism
  • phodopus-sungorus
  • body-temperature
  • bank voles
  • thermoregulation
  • photoperiod

Cite this

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title = "Seasonal variation in the resting metabolic rate of male wood mice Apodemus sylvaticus from two contrasting habitats 15 km apart",
abstract = "Diurnal and nocturnal resting metabolic rates of winter- and summer-acclimatized adult male wood mice Apodemus sylvaticus from two adjacent populations, 15 km apart, were measured. One population lived in deciduous woodland, and experienced a narrower daily range of temperatures than the second population, which inhabited maritime sand-dunes. Ambient temperature and body mass had significant effects on the resting metabolism of mice, excluding winter-acclimatized sand-dune animals where only temperature explained significant amounts of the observed variation. Only in this latter group could a thermoneutral zone be determined, with a lower critical temperature of ca. 25 degrees C and resting metabolism of 0.155 W. Nocturnal resting metabolic rates were significantly greater than diurnal levels. Winter acclimatization was associated with reductions in thermal conductance and resting metabolism, thus minimizing energy expenditure at rest. Site differences in thermoregulatory strategies were only found in winter, thermal conductances remained similar but mice from the sand-dunes had significantly lower metabolic rates than those from the woodland. Winter acclimatization in wood mice was influenced by factors in addition to photoperiod. Intra-specific and individual variations in resting metabolism, as shown in this study, potentially have a pronounced effect on the daily energy expenditure of a free-living animal.",
keywords = "seasonal acclimatization, intraspecific variation, wood mouse, Apodemus sylvaticus, brown adipose-tissue, Djungarian hamster, nonshivering thermogenesis, peromyscus-leucopus, energy-metabolism, phodopus-sungorus, body-temperature, bank voles, thermoregulation, photoperiod",
author = "N Corp and Gorman, {Martyn Lee} and Speakman, {John Roger}",
year = "1997",
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language = "English",
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pages = "229--239",
journal = "Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology",
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TY - JOUR

T1 - Seasonal variation in the resting metabolic rate of male wood mice Apodemus sylvaticus from two contrasting habitats 15 km apart

AU - Corp, N

AU - Gorman, Martyn Lee

AU - Speakman, John Roger

PY - 1997/4

Y1 - 1997/4

N2 - Diurnal and nocturnal resting metabolic rates of winter- and summer-acclimatized adult male wood mice Apodemus sylvaticus from two adjacent populations, 15 km apart, were measured. One population lived in deciduous woodland, and experienced a narrower daily range of temperatures than the second population, which inhabited maritime sand-dunes. Ambient temperature and body mass had significant effects on the resting metabolism of mice, excluding winter-acclimatized sand-dune animals where only temperature explained significant amounts of the observed variation. Only in this latter group could a thermoneutral zone be determined, with a lower critical temperature of ca. 25 degrees C and resting metabolism of 0.155 W. Nocturnal resting metabolic rates were significantly greater than diurnal levels. Winter acclimatization was associated with reductions in thermal conductance and resting metabolism, thus minimizing energy expenditure at rest. Site differences in thermoregulatory strategies were only found in winter, thermal conductances remained similar but mice from the sand-dunes had significantly lower metabolic rates than those from the woodland. Winter acclimatization in wood mice was influenced by factors in addition to photoperiod. Intra-specific and individual variations in resting metabolism, as shown in this study, potentially have a pronounced effect on the daily energy expenditure of a free-living animal.

AB - Diurnal and nocturnal resting metabolic rates of winter- and summer-acclimatized adult male wood mice Apodemus sylvaticus from two adjacent populations, 15 km apart, were measured. One population lived in deciduous woodland, and experienced a narrower daily range of temperatures than the second population, which inhabited maritime sand-dunes. Ambient temperature and body mass had significant effects on the resting metabolism of mice, excluding winter-acclimatized sand-dune animals where only temperature explained significant amounts of the observed variation. Only in this latter group could a thermoneutral zone be determined, with a lower critical temperature of ca. 25 degrees C and resting metabolism of 0.155 W. Nocturnal resting metabolic rates were significantly greater than diurnal levels. Winter acclimatization was associated with reductions in thermal conductance and resting metabolism, thus minimizing energy expenditure at rest. Site differences in thermoregulatory strategies were only found in winter, thermal conductances remained similar but mice from the sand-dunes had significantly lower metabolic rates than those from the woodland. Winter acclimatization in wood mice was influenced by factors in addition to photoperiod. Intra-specific and individual variations in resting metabolism, as shown in this study, potentially have a pronounced effect on the daily energy expenditure of a free-living animal.

KW - seasonal acclimatization

KW - intraspecific variation

KW - wood mouse, Apodemus sylvaticus

KW - brown adipose-tissue

KW - Djungarian hamster

KW - nonshivering thermogenesis

KW - peromyscus-leucopus

KW - energy-metabolism

KW - phodopus-sungorus

KW - body-temperature

KW - bank voles

KW - thermoregulation

KW - photoperiod

M3 - Article

VL - 167

SP - 229

EP - 239

JO - Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology

JF - Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology

SN - 0174-1578

IS - 3

ER -