Non-shivering thermogenesis in winter-acclimatized and in long-scotophase and cold-acclimated Apodemus mystacinus (Rodentia)

A. Haim, S. Yahav

Research output: Contribution to journalArticlepeer-review

Abstract

1. 1.|Resistance to cold through non-shivering thermogenesis (the absolute increase in O2 consumption caused by noradrenaline injection) was increased 3-fold in individuals of the broad-toothed mouse A. mystacinus, kept for 3 weeks under a short photoperiod (long scotophase 8L:16D) at an ambient temperature of 28°C, compared to control conditions (12L:12D; 28°C), and did not differ significantly from the winter-acclimatized group. 2. 2.|Acclimation of the same individuals to long scotophase and cold (8L:16d; 7°C) caused a significant (P < 0.01) increase in absolute O2 consumption and maximal body temperature, as a response to noradrenaline injectin, when compared to long-scotophase individuals (8L:16D; 28°C). 3. 3.|The results of this study support the idea that winter acclimatization of heat-production mechanisims may be induced by the extension of scotophase, which cycles very regulary in nature and in the Mediterranean region occurs before the beginning of the cold season.

Original languageEnglish
Pages (from-to)193-195
Number of pages3
JournalJournal of Thermal Biology
Volume7
Issue number4
DOIs
StatePublished - Dec 1982
Externally publishedYes

Keywords

  • Apodemus mystacinus
  • Non-shivering thermogenesis
  • long scotophase
  • photoperiod
  • resistance to cold
  • winter acclimatization

ASJC Scopus subject areas

  • General Agricultural and Biological Sciences
  • Physiology
  • Biochemistry
  • Developmental Biology

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